Diagnostic Test
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK SENSOR POWER SUPPLY 1
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.
+ - Voltage
(Approx.)ECM Connector Terminal E32 146 Ground 5 V F78 28 F79 98
Is the inspection result normal?
YES
Check intermittent incident. Refer to INTERMITTENT INCIDENT .
NO
GO TO STEP 2 .
- CHECK SENSOR POWER SUPPLY 1 CIRCUIT
- Turn ignition switch OFF.
- Disconnect following sensor harness connector.
- Check harness for short to power and to ground, between the following terminals.
ECM Sensor Connector Terminal Name Connector Terminal E32 146 APP sensor 1 (without ICC) E31 4 APP sensor 1 (with ICC) E74 4 F78 28 CKP sensor (POS) F11 1 MAF sensor F74 1 EVT control position sensor (bank 1) F83 1 EVT control position sensor (bank 2) F84 1 F79 98 TP sensor F50 5 Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair or replace error-detected parts.
- CHECK COMPONENTS
Check the following.
- Accelerator pedal position (APP) sensor 1 (Refer to COMPONENT INSPECTION .)
- Crankshaft position (CKP) sensor (POS) (Refer to COMPONENT INSPECTION .)
- Exhaust valve timing (EVT) control position sensor [Refer to COMPONENT INSPECTION (EXHAUST VALVE TIMING CONTROL POSITION SENSOR) .]
- Mass air flow (MAF) sensor (Refer to COMPONENT INSPECTION .)
- Throttle position (TP) sensor (Refer to COMPONENT INSPECTION .)
Is the inspection result normal?
YES
Check intermittent incident. Refer to INTERMITTENT INCIDENT .
NO
Replace malfunctioning component.