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 ECM POWER SUPPLY

Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.

Check the voltage between ECM harness connector terminals.

ECM				Voltage
Connector	Terminal	Connector	Terminal	Voltage
F79	86	E32	152	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 2 .

Refer to DIAGNOSIS PROCEDURE .

CHECK CONDENSER-1 POWER SUPPLY

Turn ignition switch OFF.
Disconnect condenser-1 harness connector.
Turn ignition switch ON.

Check the voltage between condenser-1 harness connector and ground.

Condenser-1		Ground	Voltage
Connector	Terminal	Ground	Voltage
F21	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 4 .

GO TO STEP 3 .

CHECK CONDENSER-1 POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect IPDM E/R harness connector.

Check the continuity between IPDM E/R harness connector and condenser-1 harness connector.

IPDM E/R		Condenser-1		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F19	55	F21	1	Existed

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

Is the inspection result normal?

YES

Refer to DIAGNOSIS PROCEDURE .

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

CHECK CONDENSER-1 GROUND CIRCUIT

Turn ignition switch OFF.

Check the continuity between condenser-1 harness connector and ground.

Condenser-1		Ground	Continuity
Connector	Terminal	Ground	Continuity
F21	2	Ground	Existed

Also check harness for short to power.

Is the inspection result normal?

YES

GO TO STEP 5 .

Repair open circuit or short to power in harness or connectors.

CHECK CONDENSER-1

Check condenser-1. Refer to COMPONENT INSPECTION (CONDENSER-1)

Is the inspection result normal?

YES

GO TO STEP 6 .

NO

Replace condenser-1.

CHECK IGNITION COIL POWER SUPPLY

Reconnect all harness connectors disconnected.
Disconnect ignition coil harness connector-1.
Turn ignition switch ON.

Check the voltage between ignition coil harness connector and ground.

Ignition coil			Ground	Voltage
Cylinder	Connector	Terminal	Ground	Voltage
1	F47	3	Ground	Battery voltage
2	F8	3
3	F48	3
4	F9	3
5	F49	3
6	F10	3

Is the inspection result normal?

YES

GO TO STEP 7 .

Repair or replace harness or connectors.

CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Check the continuity between ignition coil harness connector and ground.

Ignition coil			Ground	Continuity
Cylinder	Connector	Terminal	Ground	Continuity
1	F47	2	Ground	Existed
2	F8	2
3	F48	2
4	F9	2
5	F49	2
6	F10	2

Also check harness for short to power.

Is the inspection result normal?

YES

GO TO STEP 8 .

Repair open circuit or short to power in harness or connectors.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Disconnect ECM harness connector.

Check the continuity between ignition coil harness connector and ECM harness connector.

Ignition coil			ECM		Continuity
Cylinder	Connector	Terminal	Connector	Terminal	Continuity
1	F47	1	F79	113	Existed
2	F8	1		106
3	F48	1		103
4	F9	1		114
5	F49	1		107
6	F10	1		104

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

Is the inspection result normal?

YES

GO TO STEP 9 .

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

CHECK IGNITION COIL WITH POWER TRANSISTOR

Check ignition coil with power transistor. Refer to COMPONENT INSPECTION (IGNITION COIL WITH POWER TRANSISTOR) .

Is the inspection result normal?

YES

Check intermittent incident. Refer to INTERMITTENT INCIDENT .

NO

Replace malfunctioning ignition coil with power transistor. Refer to REMOVAL AND INSTALLATION LH , REMOVAL AND INSTALLATION RH .