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 P066A-00, P066B-00 or P0671-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P06B9-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .
INSPECT GLOW PLUG CONTROL MODULE AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect glow plug control module connector F103.
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 4 .

NO

Repair or replace error-detected parts.

CHECK GLOW PLUG NO. 1

Turn ignition switch OFF.
Disconnect glow plug control module connector F103.

Check resistance between glow plug control module connector F103 and ground.

Glow plug control module		Ground	Resistance
Connector	Terminal
F103	18	-	< 1.5 Ω

Is the inspection result normal?

YES

Replace glow plug control module. Refer to Removal and Installation .

GO TO 5 .

CHECK GLOW PLUG NO. 1 CIRCUIT

Disconnect glow plug no. 1 connector F114.

Check resistance between glow plug no. 1 terminal 1 and ground.

Glow plug no. 1 terminal	Ground	Resistance
1	-	< 1.0 Ω

Is the inspection result normal?

YES

Repair or replace the glow plug harness for an open.

Replace glow plug no. 1. Refer to Removal and Installation .