Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SOURCE (PART 1)

Turn ignition switch OFF.
Disconnect stop lamp switch connector.
Turn ignition switch ON.

Check voltage between stop lamp switch harness connector terminal and ground.

+		-	Voltage (Approx.)
Stop lamp switch
Connector	Terminal
E57	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 2 .

GO TO STEP 8 .

CHECK STOP LAMP SWITCH MOUNTING POSITION

Check stop lamp switch mounting position. Refer to INSPECTION AND ADJUSTMENT .

Is the inspection result normal?

YES

GO TO STEP 3 .

NO

Adjust stop lamp switch mounting position.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to COMPONENT INSPECTION (STOP LAMP SWITCH) .

Is the inspection result normal?

YES

GO TO STEP 4 .

NO

Repair or replace damaged parts.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND SHIFT SELECTOR (PART 1)

Disconnect A/T shift selector connector.

Check continuity between stop lamp switch harness connector terminal and A/T shift selector harness connector terminal.

Stop lamp switch		A/T shift selector		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E57	2	M7	8	Existed

Is the inspection result normal?

YES

GO TO STEP 5 .

Repair or replace damaged parts.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND SHIFT SELECTOR (PART 2)

Check continuity between stop lamp switch harness connector terminal and ground.

Stop lamp switch		-	Continuity
Connector	Terminal	-	Continuity
E57	2	Ground	Not existed

Is the inspection result normal?

YES

GO TO STEP 6 .

Repair or replace damaged parts.

CHECK GROUND CIRCUIT

Check continuity between A/T shift selector harness connector terminal and ground.

A/T shift selector		-	Continuity
Connector	Terminal	-	Continuity
M7	4	Ground	Existed

Is the inspection result normal?

YES

GO TO STEP 7 .

Repair or replace damaged parts.

CHECK SHIFT LOCK UNIT

Check shift lock unit. Refer to COMPONENT INSPECTION (SHIFT LOCK UNIT) .

Is the inspection result normal?

YES

Check intermittent incident. Refer to INTERMITTENT INCIDENT .

NO

Repair or replace damaged parts.

CHECK HARNESS BETWEEN FUSE BLOCK (J/B) AND STOP LAMP SWITCH

Turn ignition switch OFF and wait for 10 minutes or more.
Disconnect the sub electric oil pump inverter connector.
Disconnect fuse block (J/B) connector.

Check continuity between fuse block (J/B) harness connector terminal and stop lamp switch harness connector terminal.

Fuse block (J/B)		Stop lamp switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E65	9H	E57	1	Existed

Also check short circuit in harness.

Is the inspection result normal?

YES

GO TO STEP 9 .

Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM

Check the following items:
- Open circuit or short circuit in harness between ignition switch and fuse block (J/B). Refer to WIRING DIAGRAM - IGNITION POWER SUPPLY - .
- 10A fuse [No. 12, fuse block (J/B) ]. Refer to FUSE, CONNECTOR AND TERMINAL ARRANGEMENT .
- Fuse block (J/B)
Is the inspection result normal?

YES

Check intermittent incident. Refer to INTERMITTENT INCIDENT .

NO

Repair or replace damaged parts.