DTC C1095 [ABS]

id040201802900

DTC

C1095

Pump motor, motor relay

DETECTION CONDITION

• ABS motor monitor signal does not correspond to ABS HU/CM OFF signal.
• ABS motor monitor signal does not correspond to ABS HU/CM ON signal.
• ABS motor monitor OFF signal is input within specified time limit when motor signal is switched from ON to OFF by ABS HU/CM.

POSSIBLE CAUSE

• ABS 1 (30 A) fuse malfunction
• Open circuit or short to ground in the wiring harness between the battery and ABS HU/CM terminal Z
• Open circuit in the wiring harness between ABS HU/CM terminal B and body ground
• Open or short circuit in ABS HU/CM internal motor relay, or stuck motor relay
• Open or short circuit in ABS HU/CM internal pump motor, or frozen pump motor
• Poor connection at connectors (female terminal)

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT ABS FUSE CONDITION
• Is the ABS fuse (ABS 1 30 A) normal?
Yes
Go to the next step.
No
Replace the ABS fuse, then go to Step 6.
2
VERIFY PUMP MOTOR OPERATION
• Turn the ignition switch off.
• Connect the WDS or equivalent to the DLC-2.
• Turn the ignition switch to the ON position.
• Access PMP _MOTOR active command modes using the WDS or equivalent.
• Does the pump motor operate?
Yes
Go to the next step.
No
Replace the ABS HU/CM, then go to Step 6.
3
INSPECT MOTOR RELAY POWER SUPPLY FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Disconnect the ABS HU/CM connector.
• Inspect for continuity between ABS HU/CM terminal Z and the positive battery terminal.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 6.
4
INSPECT MOTOR RELAY POWER SUPPLY FOR SHORT CIRCUIT
• Inspect for continuity between ABS HU/CM terminal Z and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 6.
No
Go to the next step.
5
INSPECT PUMP MOTOR GROUND FOR OPEN CIRCUIT
• Inspect for continuity between ABS HU/CM terminal B and body ground.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
6
VERIFY THAT THE SAME DTC IS NOT PRESENT
• Reconnect all disconnected connectors.
• Clear the DTCs from the memory.
• Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more.
• Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the ABS CM, then go to the next step.
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCS ARE PRESENT
• Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See DTC Table.)
No
DTC troubleshooting completed.