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 U0106-00, U0307-00, P0383-00, P0384-00, P064C-00, P066A-00 or P066B-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 P0678-00 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 harness connector F103 from the glow plug control module.
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 THE GLOW PLUG CONTROL MODULE
1. Turn ignition switch OFF.
2. Disconnect the glow plug harness connector F103 from the glow plug control module.
3. Connect a jumper wire between glow plug control module connector F103 terminal 29 and ground.
4. Turn ignition switch ON.
5. Connect CONSULT.
6. Wait 30 seconds.
7. Using CONSULT, check for current ENGINE diagnostic trouble codes.
Did DTC P068E-00 become current?

YES

GO TO 5 .

NO

Replace glow plug control module. Refer to Removal and Installation .
CHECK DTC PRIORITY AND VERIFY GLOW PLUG HEATER CONDITION
1. Turn ignition switch OFF.
2. Disconnect the jumper wire.
3. Connect the glow plug control module to the harness connector F103.
4. Turn ignition switch ON and wait 30 seconds.
5. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
6. Check for DTC P0678-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 6 .

NO

The removal and installation of the connector corrected the malfunction.
INSPECT GLOW PLUG AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect glow plug from the harness connector F136.
3. Inspect the glow plug connections and harness 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 7 .

NO

Repair or replace error-detected parts.
CHECK THE GLOW PLUG
1. Turn ignition switch OFF.
2. Disconnect the glow plug from the harness connector F136.
3. Connect a jumper wire between glow plug heater terminal 1 at the glow plug heater connector F136 and ground.
4. Turn ignition switch ON.
5. Connect CONSULT.
6. Wait 30 seconds.
7. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.
Did DTC P068E-00 become current?

YES

Replace the glow plug. Refer to Removal and Installation .

NO

Repair or replace the glow plug harness for an open.