Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P057E-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK FUSE
1. Turn ignition switch OFF.
2. Verify that fuse 10 (10A) is installed correctly and that the fuse is not blown.
Is the inspection result normal?

YES

GO TO 3 .

NO

Replace the fuse.
INSPECT STOP LAMP SWITCH/RELAY AND ASCD CANCEL SWITCH AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch connector E38 (with LED rear combination lamps).
3. Disconnect stop lamp relay connector E12 (without LED rear combination lamps).
4. Disconnect ASCD cancel switch connector E89.
5. Inspect the harness and switches/relay connector pins for the following:
  - Loose connector
  - Corroded pins
  - Bent or broken pins
  - Pushed back or expanded pins
  - Moisture in or on the connector
  - Missing or damaged connector seals
  - Dirt or debris on or in the connector pins
  - Connector shell broken
  - Wire insulation damage
  - Damaged connector locking tab.
Is the inspection result normal?

YES

GO TO 4 .

NO

Repair or replace error-detected parts.
INSPECT ECM AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect ECM connector E93.
3. Inspect the harness and module connector pins for the following:
  - Loose connector
  - Corroded pins
  - Bent or broken pins
  - Pushed back or expanded pins
  - Moisture in or on the connector
  - Missing or damaged connector seals
  - Dirt or debris on or in the connector pins
  - Connector shell broken
  - Wire insulation damage
  - Damaged connector locking tab.
Is the inspection result normal?

YES

GO TO 5 .

NO

Repair or replace error-detected parts.

CHECK STOP LAMP SWITCH/RELAY FOR AN OPEN CIRCUIT

Check resistance between ECM connector E93 and stop lamp switch connector E38 (with LED rear combination lamps).

With LED Rear Combination Lamps

ECM		Stop lamp switch		Resistance
Connector	Terminal	Connector	Terminal	Resistance
E93	53	E38	2	< 10 Ω

Check resistance between ECM connector E93 and stop lamp relay connector E12 (without LED rear combination lamps).

Without LED Rear Combination Lamps

ECM		Stop lamp switch		Resistance
Connector	Terminal	Connector	Terminal	Resistance
E93	53	E12	3	< 10 Ω

Is the inspection result normal?

YES

GO TO 6 .

Repair or replace the harness.

CHECK ASCD CANCEL SWITCH FOR AN OPEN CIRCUIT

Check resistance between ECM connector E93 and ASCD cancel switch connector E89.

ECM		Stop lamp switch		Resistance
Connector	Terminal	Connector	Terminal
E93	54	E89	1	< 10 Ω
	41		2

Is the inspection result normal?

YES

GO TO 7 .

Repair or replace the harness.

CHECK FOR A PIN TO PIN SHORT CIRCUIT

Check resistance between ECM connector terminals.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminals
E93	53	E93	All	> 100k Ω
	54
	41

Is the inspection result normal?

YES

GO TO 8 .

Repair or replace the harness.

CHECK SWITCH/RELAY
Perform the component inspection. Refer to Component Inspection .

Is the inspection result normal?

YES

Refer to Intermittent Incident .

NO

Replace the applicable switch/relay.