C1109

C1109 POWER AND GROUND SYSTEM

Description

Ignition power supply is supplied to ABS actuator and electric unit (control unit).


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Turn the ignition switch OFF to ON.
2.Drive the vehicle at approx. 30 km/h (19 MPH) or more for approx. 1 minute.
3.Stop the vehicle.
4.Perform self-diagnosis for "ABS".
Is DTC "C1109" detected?
YES- Proceed to diagnosis procedure. Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY (1)

1.Turn the ignition switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.





4.Turn the ignition switch ON.

CAUTION:
Never start engine.
5.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

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

(1)
1.Turn the ignition switch OFF.
2.Check 10A fuse (#57).
3.Disconnect IPDM E/R harness connector.
4.Check continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R
harness connector.





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





Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
NO- Repair or replace error-detected parts.

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY (2)

1.Turn the ignition switch OFF.
2.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.





3.Turn the ignition switch ON.

CAUTION:
Never start engine.
4.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

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

(2)
1.Turn the ignition switch OFF.
2.Check 10A fuse (#74).
3.Check continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (49) and 10A fuse (#74).
Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
NO- Repair or replace error-detected parts.

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

1.Turn the ignition switch OFF.
2.Check continuity between ABS actuator and electric unit (control unit) harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK TERMINAL

- Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
- Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace error-detected parts.