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.

CAUTION: Never check between wheel sensor harness connector terminals.

CHECK WHEEL SENSOR
1. Turn the ignition switch OFF.
2. Check the wheel sensor for damage.
Is the inspection result normal?

YES

GO TO 3.

NO

GO TO 2.
REPLACE WHEEL SENSOR (1)
CONSULT
1. Replace the wheel sensor.
  - Front: Refer to Removal and Installation .
  - Rear: Refer to Removal and Installation .
2. Erase "Self Diagnostic Result" mode of "ABS".
3. Turn the ignition switch OFF → ON → OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF or ON.
4. Start the engine.
5. Drive the vehicle at approx. 50 km/h (31 MPH) or more for approx. 2 minutes.
  NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
6. Stop the vehicle.
7. Turn the ignition switch OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF.
8. Start the engine.
  NOTE: Wait at least 10 seconds after starting the engine.
9. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1101", "C1102", "C1103" or "C1104" detected?

YES

GO TO 3.

NO

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

YES

GO TO 5.

NO

Repair or replace harness or connector and securely lock the connector, GO TO 4.
PERFORM SELF-DIAGNOSIS (1)
CONSULT
1. Erase "Self Diagnostic Result" mode of "ABS".
2. Turn the ignition switch OFF → ON → OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF or ON.
3. Start the engine.
4. Drive the vehicle at approx. 50 km/h (31 MPH) or more for approx. 2 minutes.
  NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
5. Stop the vehicle.
6. Turn the ignition switch OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF.
7. Start the engine.
  NOTE: Wait at least 10 seconds after starting the engine.
8. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1101", "C1102", "C1103" or "C1104" detected?

YES

GO TO 5.

NO

Inspection End.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT
Check the ABS actuator and electric unit (control unit) power supply and ground circuits. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

GO TO 6.

NO

Repair / replace harness, connector, fuse, or fusible link.
CHECK TERMINAL
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector and then check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
3. Disconnect wheel sensor harness connector and check each wheel sensor pin terminal for damage or loose connection with harness connector.
Is the inspection result normal?

YES

GO TO 8.

NO

Repair / replace harness, connector, or terminal, GO TO 7.
PERFORM SELF-DIAGNOSIS (2)
CONSULT
1. Connect ABS actuator and electric unit (control unit) harness connector.
2. Connect wheel sensor harness connector.
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 the engine.
6. Drive the vehicle at approx. 50 km/h (31 MPH) or more for approx. 2 minutes.
  NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
7. Stop the vehicle.
8. Turn the ignition switch OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF.
9. Start the engine.
  NOTE: Wait at least 10 seconds after starting the engine.
10. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1101", "C1102", "C1103" or "C1104" detected?

YES

GO TO 8.

NO

Inspection End.

CHECK WHEEL SENSOR HARNESS

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

Check the continuity between ABS actuator and electric unit (control unit) harness connector and wheel sensor harness connector. (Check the continuity while turning steering wheel left and right or while moving center harness in wheel housing.)

Power Supply Circuit

ABS actuator and electric unit (control unit)		Wheel sensor			Continuity
Connector	Terminal	Connector		Terminal
E26	19	E68	Front LH wheel	1	Yes
	16	E41	Front RH wheel
	31	C1	Rear LH wheel
	17	C2	Rear RH wheel

Signal Circuit

ABS actuator and electric unit (control unit)		Wheel sensor			Continuity
Connector	Terminal	Connector		Terminal
E26	8	E68	Front LH wheel	2	Yes
	4	E41	Front RH wheel
	18	C1	Rear LH wheel
	29	C2	Rear RH wheel

Is the inspection result normal?

YES

GO TO 10.

Repair or replace harness or connector GO TO 9.

PERFORM SELF DIAGNOSTIC RESULT (3)
CONSULT
1. Connect ABS actuator and electric unit (control unit) harness connector.
2. Connect wheel sensor harness connector.
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 the engine.
6. Drive the vehicle at approx. 50 km/h (31 MPH) or more for approx. 2 minutes.
  NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
7. Stop the vehicle.
8. Turn the ignition switch OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF.
9. Start the engine.
  NOTE: Wait at least 10 seconds after starting the engine.
10. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1101", "C1102", "C1103" or "C1104" detected?

YES

GO TO 10.

NO

Inspection End.
CHECK WHEEL SENSOR OUTPUT SIGNAL
1. Disconnect ABS actuator and electric unit (control unit) harness connector.
2. Disconnect wheel sensor harness connector.
3. Connect ABS active wheel sensor tester (SST: J-45741-A) to wheel sensor using appropriate adapter.
4. Turn the ABS active wheel sensor tester power switch ON.
  NOTE: The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the battery in the ABS active wheel sensor tester before proceeding.
5. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel sensor tester. The red SENSOR indicator should flash ON and OFF to indicate an output signal.
  NOTE: If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and retest.
Does the ABS active wheel sensor tester detect a signal?

YES

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

NO

GO TO 11.
REPLACE WHEEL SENSOR (2)
CONSULT
1. Replace the wheel sensor.
  - Front: Refer to Removal and Installation .
  - Rear: Refer to Removal and Installation .
2. Connect ABS actuator and electric unit (control unit) harness connector.
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 the engine.
6. Drive the vehicle at approx. 50 km/h (31 MPH) or more for approx. 2 minutes.
  NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
7. Stop the vehicle.
8. Turn the ignition switch OFF.
  NOTE: Wait at least 10 seconds after turning ignition switch OFF.
9. Start the engine.
  NOTE: Wait at least 10 seconds after starting the engine.
10. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "C1101", "C1102", "C1103" or "C1104" detected?

YES

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

NO

Inspection End.