INFINITI : VQ35HR

Showing posts with label VQ35HR. Show all posts

Sunday, February 16, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 296

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 329

Check the voltage between ECM harness connector terminals under the following condition.

Is the inspection result normal?

YES - INSPECTION END

NO - GO TO 5.

5.CHECK HEATED OXYGEN SENSOR 2-III

Check the voltage between ECM harness connector terminals under the following condition.

Is the inspection result normal?

YES - INSPECTION END

NO - GO TO 6.

6.REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning heated oxygen sensor 2.

CAUTION:

- Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a

concrete floor; use a new one.

- Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread

Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant

(commercial service tool).

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 834

DTC Logic

With Mobile Entertainment System

U1220 AV CONTROL UNIT

Description

Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact

Disc/Radio/Stereo/Service and Repair/AV Control Unit/Exploded View/With Mobile Entertainment System.

DTC Logic

Without Mobile Entertainment System

Saturday, February 15, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 829

U121C AV CONTROL UNIT

Description

Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact

Disc/Radio/Stereo/Service and Repair/AV Control Unit/Exploded View/With Mobile Entertainment System.

DTC Logic

Without Mobile Entertainment System

U121C AV CONTROL UNIT

Description

Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact

Disc/Radio/Stereo/Service and Repair/AV Control Unit/Exploded View/Without Mobile Entertainment System.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 524

2. Check that water is not inside connectors.

Is the inspection result normal?

YES - GO TO 3.

NO - Repair or replace harness connector.

3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-I

1. Turn ignition switch ON.

2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

Is the inspection result normal?

YES - GO TO 10.

NO - GO TO 4.

4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES - GO TO 6.

NO - GO TO 5.

5.DETECT MALFUNCTIONING PART

Check the following.

- Harness connectors B171, B469

- Harness connectors B418, M66

- Harness for open between ECM and EVAP control system pressure sensor

- Repair open circuit.

6.CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES - GO TO 7.

NO - Repair short to ground or short to power in harness or connectors.

Friday, February 14, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 587

1. Stop vehicle.

2. Drive vehicle in "D" position allowing it to shift from 1GR to 7GR and check shift timing and shift shock.

- INSPECTION END

Diagnosis Procedure

1.CHECK INTERMITTENT INCIDENT

See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Perform Efficient Diagnosis For an Electrical Incident.

Is the inspection result normal?

YES - Replace A/T assembly. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Removal and

Replacement/7AT RE7R01A/Transmission Assembly/Exploded View.

NO - Repair or replace damaged parts.

5AT RE5R05A

P0735 5GR INCORRECT RATIO

Description

This malfunction is detected when the A/T does not shift into 5GR position as instructed by TCM. This is not only caused by electrical

malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.

On Board Diagnosis Logic

- This is an OBD-II self-diagnostic item.

- Diagnostic trouble code "P0735" with CONSULT-III or 22nd judgment flicker without CONSULT-III is detected when TCM detects any

inconsistency in the actual gear ratio.

Possible Cause

- Input clutch solenoid valve

- Front brake solenoid valve

- Direct clutch solenoid valve

- High and low reverse clutch solenoid valve

- Each clutch and brake

- Hydraulic control circuit

DTC Confirmation Procedure

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before

performing the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III

1. Start the engine and select "DATA MONITOR" in "TRANSMISSION".

2. Make sure that "ATF TEMP 1" is within the following range.

ATF TEMP 1: 20锟斤拷C (68锟斤拷F) - 140锟斤拷C (284锟斤拷F)

If out of range, drive vehicle to warm ATF or stop engine to cool ATF.

3. Select "5TH GR FNCTN P0735" in "DTC & SRT CONFIRMATION" in "TRANSMISSION".

4. Drive vehicle and maintain the following conditions.

MANU MODE SW: ON

GEAR: "5" position

ACCELE POSI: 0.6/8 or more

VEHICLE SPEED: 10 km/h (6 MPH) or more

ENGINE SPEED: INPUT SPEED - 50 rpm or more

INPUT SPEED: 300 rpm or more

5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to

"TESTING".

CAUTION:

If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than

"P0735" is shown, refer to " Road Test".

- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/5AT

RE5R05A/Trouble Diagnosis/CONSULT-III Function (Transmission) when not shifted from the 1GR to 5GR. (Neither "OK" nor "NG" are

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 504

This solenoid valve responds to signals from the ECM. When the

ECM sends an ON signal, the coil in the solenoid valve is energized.

A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative

emission control system components.

This solenoid valve is used only for diagnosis, and usually remains opened.

When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows "EVAP

Control System" diagnosis.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

- GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and wait at least 8 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES - Go to See: P Code Charts/P0447.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 427

Is intake air leak detected?

YES - Discover air leak location and repair.

NO - GO TO 2.

2.CHECK FOR EXHAUST SYSTEM CLOGGING

Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.

Is the inspection result normal?

YES-1 - With CONSULT-III: GO TO 3.

YES-2 - Without CONSULT-III: GO TO 4.

NO - Repair or replace malfunctioning part.

3.PERFORM POWER BALANCE TEST

With CONSULT-III

1. Start engine.

2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.

3. Check that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES - GO TO 9.

NO - GO TO 4.

4.CHECK FUNCTION OF FUEL INJECTOR

1. Start engine and let it idle.

2. Listen to each fuel injector operation.

Clicking sound should be heard.

Is the inspection result normal?

YES - GO TO 5.

NO - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.

5.CHECK FUNCTION OF IGNITION COIL-I

CAUTION:

Perform the following procedure in a place with no combustible objects and good ventilation.

1. Turn ignition switch OFF.

2. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pressure.

NOTE:

Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.

3. Start engine.

4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.

5. Turn ignition switch OFF.

6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.

7. Remove ignition coil and spark plug of the cylinder to be checked.

8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.

9. Connect spark plug and harness connector to ignition coil.

Thursday, February 13, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 646

Diagnosis Procedure

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connections M16, M70. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Power Supply and Ground Circuit.

Is the inspection result normal?

YES - GO TO 2.

NO - Repair or replace ground connections.

2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-I

1. Disconnect battery current sensor harness connector.

2. Turn ignition switch ON.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 716

With GST

1. Start the engine.

2. Drive vehicle for approximately 5 minutes in urban areas.

Is ATF temperature within specified range?

YES - GO TO 3.

NO - Drive vehicle to warm ATF or stop engine to cool ATF.

3.CHECK SYMPTOM (PART 1)

With CONSULT-III

1. Select "7TH GR FNCTN P1734" in "DTC & SRT confirmation" in "TRANSMISSION".

2. Drive vehicle with manual mode and maintain the following conditions.

GEAR: 7

ACCELE POSI: 0.7/8 or more

VEHICLE SPEED: 10 km/h (7 MPH) or more

3. Keep the current driving status for 2 seconds or more if CONSULT-III screen changes from "OUT OF

CONDITION" to "TESTING".

CAUTION:

When "TESTING" is not indicated on CONSULT-III for a long time, check "Self Diagnostic Results" in "TRANSMISSION". When a

DTC other than "P1734" is detected, check the DTC. See: Diagnostic Trouble Code Descriptions/DTC Index/TCM.

With GST

1. Drive vehicle and maintain the following conditions for 2 seconds or more.

Selector lever: "M" position

Gear position: 7th

Accelerator pedal opening: 0.7/8 or more

Vehicle speed: 10 km/h (7 MPH) or more

2. Check DTC.

Is "OUT OF CONDITION", "STOP VEHICLE" or "COMPLETED RESULT NG" displayed? / Is "P1734" detected?

YES-1 - "OUT OF CONDITION": Perform "Step 3" again.

YES-2 - "STOP VEHICLE": GO TO 4.

YES-3 - "COMPLETED RESULT NG": Go to See: P Code Charts/P1734.

YES-4 - "P1734" is detected: Go to See: P Code Charts/P1734.

NO - Check intermittent incident. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Perform Efficient Diagnosis

For an Electrical Incident.

4.CHECK SYMPTOM (PART 2)

With CONSULT-III

1. Stop vehicle.

2. Drive vehicle in "D" position allowing it to shift from 1st to 7th gear and check shift timing and shift shock.

- INSPECTION END

Diagnosis Procedure

1.CHECK INTERMITTENT INCIDENT

See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Perform Efficient Diagnosis For an Electrical Incident.

Is the inspection result normal?

YES - Replace A/T assembly. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Removal and

Replacement/7AT RE7R01A/Transmission Assembly/Exploded View.

NO - Repair or replace damaged parts.

P1805

P1805 BRAKE SWITCH

Description

Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.

This signal is used mainly to decrease the engine speed when the vehicle is being driven.

Wednesday, February 12, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 295

Check the voltage between ECM harness connector terminals under the following condition.

Is the inspection result normal?

YES - INSPECTION END

NO - GO TO 3.

3.PERFORM COMPONENT FUNCTION CHECK-III

Check the voltage between ECM harness connector terminals under the following condition.

Is the inspection result normal?

YES - INSPECTION END

NO - Go to See: P Code Charts/P0139.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 377

8.CHECK INTERMITTENT INCIDENT

See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Trouble

Diagnosis For Intermittent Incident/Description.

- INSPECTION END

Component Inspection

1.CHECK FUEL TANK TEMPERATURE SENSOR

1. Turn ignition switch OFF.

2. Disconnect "fuel level sensor unit and fuel pump (main)" harness connector.

3. Remove "fuel level sensor unit and fuel pump (main)".

4. Check resistance between "fuel level sensor unit and fuel pump

(main)" terminals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES - INSPECTION END

NO - Replace "fuel level sensor unit and fuel pump (main)".

P0196

P0196 EOT SENSOR

Description

The engine oil temperature sensor is used to detect the engine oil temperature. The sensor modifies a voltage signal from the ECM.

The modified signal returns to the ECM as the engine oil temperature input. The sensor uses a thermistor which is sensitive to the change in

temperature. The electrical resistance of the thermistor decreases as temperature increases.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 215

Without CONSULT-III

1. Turn ignition switch OFF.

2. Disconnect MAF sensor harness connector and reconnect it again.

3. Start engine and warm it up to normal operating temperature.

4. Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES - INSPECTION END

NO - Clean or replace malfunctioning MAF sensor.

P010D

P0102, P0103, P010C, P010D MAF SENSOR

Description

The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow.

The mass air flow sensor controls the temperature of the hot wire to a certain amount. The heat generated by the hot wire is reduced as the intake

air flows around it. The greater air flow, the greater the heat loss.

Therefore, the electric current supplied to hot wire is changed to maintain the temperature of the hot wire as air flow increases. The

Tuesday, February 11, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 560

Diagnosis For Intermittent Incident/Description.

- INSPECTION END

P0700

P0700 TRANSMISSION CONTROL

Description

The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The

TCM controls the A/T.

On Board Diagnosis Logic

- This is an OBD-II self-diagnostic item.

- Diagnostic trouble code "P0700" with CONSULT-III is detected when TCM is malfunctioning.

Possible Cause

TCM.

DTC Confirmation Procedure

NOTE:

If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before

performing the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III

1. Turn ignition switch ON.

2. Select "SELF-DIAG RESULTS" in "TRANSMISSION".

3. Touch "START".

4. Start engine.

5. Run engine for at least 2 consecutive seconds at idle speed.

6. If DTC is detected, go to See: P Code Charts/P0700.

WITH GST

Follow the procedure "WITH CONSULT-III".

Diagnosis Procedure

1.CHECK DTC

With CONSULT-III

1. Turn ignition switch ON.

2. Select "SELF-DIAG RESULTS" in "TRANSMISSION".

3. Touch "ERASE".

4. Turn ignition switch OFF and wait for at least 10 seconds.

5. Perform See: P Code Charts/P0700.

Is the "P0700" displayed again?

YES - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and

Repair.

NO - INSPECTION END

5AT RE5R05A

P0705 TRANSMISSION RANGE SWITCH A

Description

The transmission range switch detects the selector lever position and sends a signal to the TCM.

CONSULT-III Reference Value in Data Monitor Mode

On Board Diagnosis Logic

- This is an OBD-II self-diagnostic item.

- Diagnostic trouble code "P0705" with CONSULT-III or 9th judgment flicker without CONSULT-III is detected under the following

conditions.

- When TCM does not receive the correct voltage signal from the transmission range switches 1, 2, 3 and 4 based on the gear position.

- When no other position but "P" position is detected from "N" position.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 628

Electric throttle control actuator consists of throttle control motor, throttle position (TP) sensor, etc. The throttle position sensor responds to the

throttle valve movement.

The throttle position sensor has two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output

voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the

voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the

ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

- GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Repeat steps 2 and 3 for 32 times.

5. Check 1st trip DTC.

Is 1st trip DTC detected?

YES - Go to See: P Code Charts/P1226.

NO - INSPECTION END

Diagnosis Procedure

1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Turn ignition switch OFF.

2. Remove the intake air duct.

3. Check if foreign matter is caught between the throttle valve (1) and the housing.

Is the inspection result normal?

YES - GO TO 2.

NO - Remove the foreign matter and clean the electric throttle control actuator inside.

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Monday, February 10, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 240

Diagnosis Procedure

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connections M16, M70. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Power Supply and Ground Circuit.

Is the inspection result normal?

YES - GO TO 2.

NO - Repair or replace ground connections.

2.CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT

1. Disconnect electric throttle control actuator harness connector.

2. Turn ignition switch ON.

3. Check the voltage between electric throttle control actuator harness connector and ground.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 106

Diagnosis Procedure

1.LANE CAMERA UNIT TROUBLE DIAGNOSIS

Perform trouble diagnosis of the lane camera unit for "C1B00 CAMERA UNIT MALF". See: C Code Charts/C1B00/Camera Unit Malfunction.

- GO TO 2.

2.ERASE DTC

Erase DTC memory of ABS actuator and electric unit (control unit) with self-diagnosis of CONSULT-III.

Is the DTC "C1B00" erased?

YES - INSPECTION END

NO - Replace ABS actuator and electric unit (control unit).

C1B01

C1B01 CAM AIMING INCMP

DTC Logic

DTC DETECTION LOGIC

Diagnosis Procedure

1.CAMERA AIMING

Perform the camera aiming. See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Testing and

Inspection/Programming and Relearning/Camera Aiming Adjustment/Description.

- GO TO 2.

2.PERFORM SELF-DIAGNOSIS OF LANE CAMERA UNIT

Perform the self-diagnosis of lane camera unit with CONSULT-III.

Is the DTC "C1B01" detected?

YES - Replace the lane camera unit.

NO - INSPECTION END

C1B02

C1B02 VHCL SPD DATA MALF

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.DTC ERASE

Erase the DTC memory of lane camera unit with CONSULT-III.

- GO TO 2.

2.DTC CONFIRMATION

1. Turn ignition ON.

2. Drive at 40 km/h or more.

3. Stop the vehicle.

4. Perform the self-diagnosis of lane camera unit with CONSULT-III.

Is the DTC "C1B02" detected?

YES - See: C Code Charts/C1B02.

NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Perform Efficient Diagnosis For an Electrical Incident.

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 559

3. Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES - GO TO 7.

NO - GO TO 3.

3.CHECK SENSOR POWER SUPPLY CIRCUITS

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES - GO TO 4.

NO - Repair short to ground or short to power in harness or connectors.

4.CHECK COMPONENTS

Check the following.

- CMP sensor (bank 1) ( See: P Code Charts/P0340.)

- EVT control position sensor (bank 1) ( See: P Code Charts/P1078.)

- PSP sensor ( See: P Code Charts/P0550.)

Is the inspection result normal?

YES - GO TO 5.

NO - Replace malfunctioning component.

5.CHECK THROTTLE POSITION (TP) SENSOR

See: P Code Charts/P0122.

Is the inspection result normal?

YES - GO TO 9.

NO - GO TO 6.

6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.

2. Go to See: P Code Charts/P0122.

- INSPECTION END

7.CHECK APP SENSOR

See: P Code Charts/P2122.

Is the inspection result normal?

YES - GO TO 9.

NO - GO TO 8.

8.REPLACE ACCELERATOR PEDAL ASSEMBLY

1. Replace accelerator pedal assembly.

2. Go to See: P Code Charts/P2122.

- INSPECTION END

9.CHECK INTERMITTENT INCIDENT

See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Trouble

Sunday, February 9, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 122

3. Check resistance between exhaust valve timing control magnet retarder terminals as per the following.

Is the inspection result normal?

YES - INSPECTION END

NO - GO TO 2.

2.REPLACE EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

1. Replace malfunctioning exhaust valve timing control magnet retarder.

2. Perform See: Engine, Cooling and Exhaust/Engine/Timing Components/Variable Valve Timing/Testing and Inspection/Special Repair

Requirement.

- INSPECTION END

P0031

P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER

Description

SYSTEM DESCRIPTION

The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating condition to keep the temperature of

A/F sensor 1 element within the specified range.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

Saturday, February 8, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 643

3.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1. Disconnect IPDM E/R harness connector E9.

2. Check the continuity between IPDM E/R sensor harness connector and ECM harness connector.

3. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES - GO TO 5.

NO - GO TO 4.

4.DETECT MALFUNCTIONING PART

Check the following.

- Harness connectors E12, F3

- Harness for open or short between ECM and IPDM E/R

- Repair open circuit, short to ground or short to power in harness or connectors.

5.CHECK FUSE

1. Disconnect 15 A fuse (No. 87) from IPDM E/R.

2. Check 15 A fuse for blown.

Is the inspection result normal?

YES - GO TO 6.

NO - Replace 15 A fuse.

6.CHECK INTERMITTENT INCIDENT

See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Trouble

Diagnosis For Intermittent Incident/Description.

Is the inspection result normal?

YES - Replace IPDM E/R.

NO - Repair or replace harness or connectors.

P1421

P1421 COLD START CONTROL

Description

ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.

This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.

DTC Logic

DTC DETECTION LOGIC

NOTE:

- If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

- GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Select "DATA MONITOR" mode with CONSULT-III.