Test B: HCU Pump Motor Circuit Shorted

NOTE: DTC C1095 is generated when battery voltage is detected for pump motor input, when it is expected to be Zero. Possible contributing conditions include a seized or shorted pump motor, short in wiring and defective ABS control module.

Connect NGS tester or scan tool. Turn ignition On. Clear continuous DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES . Perform drive cycle test. See DRIVE CYCLE TEST . Retrieve and document continuous DTCs. If DTC C1095 is retrieved, go to next step. If different DTC is retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS table. If SYSTEM PASS is obtained, go to step 4 .
Turn ignition off. Connect Breakout Box. Replace ABS (60-amp) fuse, located in main fuse junction panel, with a 20-amp test fuse. Using jumper wire, connect Breakout Box pin No. 60 to 57, then 60 to 2, and then 60 to 20. Turn ignition on and listen for pump motor operation. Turn ignition off. If pump motor runs until ignition is turned off, replace ABCM and go to step 4 . If pump did not run, go to next step.
Install new 20-amp fuse. Disconnect HCU connector. Remove jumpers from Breakout Box. Turn ignition on, for at least 15 seconds. Turn ignition off. Check fuse. If fuse is okay, replace HCU and go to next step. If fuse is blown, repair short in Red/Yellow wire circuit between ABCM and HCU pump motor. Replace fuse and go to next step.
Reconnect all disconnected components. Restore vehicle, clear continuous DTCs. Repeat DRIVE CYCLE TEST . Retrieve and document continuous DTCs. Is SYSTEM PASS obtained? If yes, repair is complete. If SYSTEM PASS is not obtained and DTC C1095 is retrieved, go to step 1) . If different DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS table.