DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

HARNESS CONNECTOR
Visually inspect all applicable harness connectors for the following:
- Visible damage to connector or terminal
- Loose terminal
- Poor connection
  NOTE: All harness connectors should be inspected from the air bag diagnosis sensor unit to the end component (including any in-line connectors).
Is the inspection result normal?

YES

GO TO 2.

NO

Perform one of the following repairs:
- Visible damage: Replace the harness.
- Loose terminal: Secure the terminal.
- Poor connection: Secure the connection.
CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?

YES

GO TO 3.

NO

Refer to Intermittent Incident .
WIRING HARNESS
Check the wiring harness for visible damage.

NOTE: The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component (including any in-line connectors).

Is the inspection result normal?

YES

GO TO 4.

NO

Replace the harness.

CHECK SPIRAL CABLE CIRCUIT

Turn ignition switch OFF.
Disconnect driver air bag module harness connectors and spiral cable harness connector.

Check continuity between driver air bag module harness connector and spiral cable connector.

Driver air bag module		Spiral cable		Continuity
Connector	Terminal	Connector	Terminal
M101	10	M29	28	Yes
	11		30
M103	9		30
	12		29

Check continuity between driver air bag module harness connector and ground.

Driver air bag module		Ground	Continuity
Connector	Terminal
M101	10		No
	11
M103	9
	12

Is the inspection result normal?

YES

GO TO 5.

Replace the spiral cable. Refer to Removal and Installation .

CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?

YES

GO TO 6.

NO

Refer to Intermittent Incident .
FRONT DRIVER AIR BAG MODULE
1. Replace the driver air bag module. Refer to Removal and Installation .
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?

YES

GO TO 7.

NO

Clear DTC. Inspection End.
AIR BAG DIAGNOSIS SENSOR UNIT
1. Replace the air bag diagnosis sensor unit. Refer to Removal and Installation .
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?

YES

GO TO 8.

NO

Clear DTC. Inspection End.
RELATED HARNESS
Replace the related harness.

END