C1197

C1197 VACUUM SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.
1.Turn the ignition switch ON.
2.Perform self-diagnostic result.
Is DTC C1197 detected?
YES- Proceed to diagnosis procedure. Refer to "Diagnosis Procedure" .
NO- Inspection End.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Electrical Diagrams.

1. CHECK BRAKE BOOSTER

1.Turn the ignition switch OFF.
2.Check brake booster. Refer to "Inspection" Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace brake booster. Refer to "Removal and installation" Removal And Installation.

2. CHECK VACUUM PIPING

Check vacuum piping. Refer to "Exploded ViewQR25DE" Exploded View or "Exploded ViewVQ35DE" Exploded View.
Is the inspection result normal?
YES- GO TO 3.
NO- Replace vacuum piping. Refer to "Removal and Installation" Removal And Installation.

3. CHECK VACUUM SENSOR CIRCUIT

1.Disconnect vacuum sensor harness connector.
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Check continuity between vacuum sensor harness connector and ABS actuator and electric unit (control unit) harness connector.





4.Check continuity between vacuum sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace malfunctioning components.

4. CHECK TERMINAL

- Check vacuum sensor pin terminals for damage or loose connection with harness connector.
- Check 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 5.
NO- Repair or replace malfunctioning components.

5. REPLACE VACUUM SENSOR

With CONSULT
1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Replace vacuum sensor. Refer to "Exploded View" Exploded View.

CAUTION:
Always replace brake booster because vacuum sensor cannot be disassembled.
3.Erase self-diagnosis result for "ABS".
4.Turn the ignition switch OFF.
5.Start engine.
6.Perform self-diagnosis for "ABS".
Is DTC "C1197" detected?
YES- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Removal And Installation.
NO- Inspection End.