DTC C1095, C1096 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2805900

DTC | C1095, C1096 | Pump motor, motor relay system
DETECTION CONDITION | • C1095 ― When the motor relay is switched from ON to OFF, the pump motor voltage is turned off within the specified time (Pump motor rotation malfunction (sticking)). ― Malfunction is detected in pump motor drive circuit during motor relay test. ― Motor relay supply voltage is 40%of the ignition voltage or lower. ― While the pump motor is stopped, pump motor monitor voltage is continuously 2 V or more for 1 s. • C1096 ― While the pump motor is operated, difference in voltage between ignition and pump motor is continuously more than 4.0 V for 100 ms.
POSSIBLE CAUSE | • ABS 40A fuse malfunction • Open or short to ground circuit in the wiring harness between the battery and the DSC HU/CM terminal B • Open circuit in the wiring harness between the DSC HU/CM terminal A and the body ground • Open or short circuit in the DSC HU/CM internal motor relay, or stuck motor relay • Open or short circuit in the DSC HU/CM internal motor, or frozen motor • Poor connection at connectors (female terminal)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT FUSE CONDITION • Is the ABS 40A fuse normal? | Yes | Go to the next step.
No | Replace the fuse, then go to Step 5.
2 | INSPECT MOTOR RELAY POWER SUPPLY FOR OPEN CIRCUIT • Turn the ignition switch to the LOCK position. • Disconnect DSC HU/CM connector. • Turn the ignition switch to the ON position (engine off). • Measure voltage between DSC HU/CM terminal B (harness-side) and ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between battery positive terminal and DSC HU/CM terminal B, then go to Step 5.
3 | INSPECT PUMP MOTOR GROUND FOR OPEN CIRCUIT • Turn the ignition switch to the LOCK position. • Inspect for continuity between DSC HU/CM terminal A (harness-side) and ground. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal A and ground, then go to Step 5.
4 | VERIFY PUMP MOTOR OPERATION • Turn the ignition switch to the LOCK position. • Connect the M-MDS to the DLC-2. • Turn the ignition switch to the ON position (engine off). • Access PMP_MOTOR active command modes using M-MDS. • Does the pump motor operate? | Yes | Go to the next step.
No | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
5 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Gradually slow down and stop the vehicle. • Is the same DTC present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
6 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No | DTC troubleshooting completed.