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.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY

Turn the ignition switch OFF.
Disconnect ABS actuator and electric unit (control unit) harness connectors.

Check the voltage between ABS actuator and electric unit (control unit) harness connectors and ground.

ABS actuator and electric unit (control unit)		--	Voltage (Approx.)
Connector	Terminal
E125	18	Ground	0 V
E127	49

Turn the ignition switch ON
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connectors and ground.

ABS actuator and electric unit (control unit)		--	Voltage (Approx.)
Connector	Terminal
E125	18	Ground	Battery voltage
E127	49

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT

Turn the ignition switch OFF.
Check the 10 A fuses (12 and 50).
Disconnect fuse block (J/B) harness connector.
Disconnect IPDM E/R harness connector.

Check the continuity between ABS actuator and electric unit (control unit) harness connector and fuse block (J/B).

ABS actuator and electric unit (control unit)		Fuse block (J/B)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E127	49	E51	2T	Yes

Check the continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R.

ABS actuator and electric unit (control unit)		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E125	18	E119	15	Yes

Check the continuity between ABS actuator and electric unit (control unit) harness connectors and ground.

ABS actuator and electric unit (control unit)		--	Continuity
Connector	Terminal
E125	18	Ground	No
E127	49

Is the inspection result normal?

YES

Perform trouble diagnosis for ignition power supply.

Repair / replace harness, connector, or fuse.

CHECK MOTOR AND MOTOR RELAY POWER SUPPLY

Turn the ignition switch OFF.

Check the voltage between ABS actuator and electric unit (control unit) harness connectors and ground.

ABS actuator and electric unit (control unit)		--	Voltage (Approx.)
Connector	Terminal
E125	4	Ground	Battery voltage
E127	47

Turn the ignition switch ON.
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connectors and ground.

ABS actuator and electric unit (control unit)		--	Voltage (Approx.)
Connector	Terminal
E125	4	Ground	Battery voltage
E127	47

Is the inspection result normal?

YES

GO TO 5.

GO TO 4.

CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check the 50 A fusible link (F).
3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminals 4, 47 and 50 A fusible link (F).
Is the inspection result normal?

YES

Perform trouble diagnosis for battery power supply.

NO

Repair / replace harness, connector, or fusible link.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY

Turn the ignition switch OFF.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

ABS actuator and electric unit (control unit)

Voltage

(Approx.)

Connector

Terminal

E125

Ground

Battery voltage

Turn the ignition switch ON
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

ABS actuator and electric unit (control unit)

Voltage

(Approx.)

Connector

Terminal

E125

Ground

Battery voltage

Is the inspection result normal?

YES

GO TO 7.

GO TO 6.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check the 30 A fusible link (L).
3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal 1 and 30 A fusible link (L).
Is the inspection result normal?

YES

Perform trouble diagnosis for battery power supply.

NO

Repair / replace harness, connector, or fusible link.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

ABS actuator and electric unit (control unit)		--	Continuity
Connector	Terminal
E125	2	Ground	Yes
	3
E127	48

Is the inspection result normal?

YES

GO TO 8.

Repair / replace harness, connector, or terminal.

CHECK TERMINAL
1. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
2. Check the fuse block (J/B) pin terminals for damage or loose connection with harness connector.
3. Check the IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation .

NO

Repair / replace harness, connector, or terminal.