Diagnosis Procedure

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

CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Check the vacuum sensor harness connector for disconnection or looseness.
3. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
Is the inspection result normal?

YES

GO TO 2.

NO

Repair / replace harness or connector. GO TO 2.
CHECK TERMINAL
1. Turn the ignition switch OFF.
2. Disconnect vacuum sensor harness connector.
3. Check the vacuum sensor pin terminals for damage or loose connection with harness connector.
4. Disconnect ABS actuator and electric unit (control unit) harness connector.
5. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

GO TO 3.

NO

Repair / replace harness, connector, or terminal.

CHECK VACUUM SENSOR CIRCUIT

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

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

Vacuum sensor		ABS actuator and electric unit (control unit)		Continuity
Connector	Terminal	Connector	Terminal
E51	1	E26	12	Yes
	2		24
	3		5

Check the continuity between vacuum sensor harness connector and ground.

Vacuum sensor		-	Continuity
Connector	Terminal
E51	1	Ground	No
	2
	3

Is the inspection result normal?

YES

GO TO 4.

Repair / replace harness or connector.

REPLACE VACUUM SENSOR
CONSULT
1. Connect ABS actuator and electric unit (control unit) harness connector.
2. Replace the vacuum sensor.
  CAUTION: Always replace brake booster because vacuum sensor cannot be disassembled. Refer to Removal and installation .
3. Erase "Self Diagnostic Result" mode of "ABS".
4. Turn the ignition switch OFF → ON → OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF or ON.
5. Start engine.
  NOTE: Wait at least 10 seconds after starting the engine.
6. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1198" detected?

YES

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

NO

Inspection End.