Test D: Abs Relay Shorted

DTC C1115 is generated by ABCM detection of battery voltage from pump motor feedback when it is expected to be low. Possible contributing conditions are a shorted ABS relay, defective ABCM or short to battery voltage in motor feedback circuit.

1. Check Fault Repeatability
   
   Turn ignition off. Connect scan tool. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  . Perform DRIVE CYCLE TEST  . Retrieve DTCs. If DTC C1115 exists, go to next step. If DTC C1095 exists with C1115, ignore DTC C1095. If only DTC C1095 exists, go to TEST B  . If DTC C1115 does not exist, check for possible intermittent condition. If different DTCs are retrieved, see DTC TEST INDEX  table.
2. Check For Short-To-Power
   
   Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  . Turn ignition off. Disconnect ABS relay. Perform DRIVE CYCLE TEST  . Check if any DTCs exist. If DTC C1115 exists, go to step 5)  . If a different DTC exists, ignore DTC and go to next step.
3. Check ABS Relay
   
   Perform ABS relay component test. See ABS RELAY  under COMPONENT TESTING. If relay is okay, reinstall and go to next step. If relay is not okay, replace relay and go to step 6)  .
4. Check Relay Control Circuit
   
   Install breakout box. Using DVOM, check resistance between breakout box pins No. 57 and 60. If reading is more than 10,000 ohms, replace ABCM, then go to step 6)  . If reading is less than 10,000 ohms, repair Red/Yellow wire between ABCM and HCU hydraulic pump motor. Go to step 6)  .
5. Check Circuit No. 907 (Yellow Wire) For Short-To-Power
   
   Check voltage between breakout box pin No. 30 and ground. If reading is greater than 10 volts, locate and repair short to battery voltage in Yellow wire between ABCM and HCU hydraulic pump motor. Go to next step. If reading is less than 10 volts, replace ABCM and go to next step.
6. Verify Repair
   
   Restore ABS system and connect all components. Clear DTCs. Perform DRIVE CYCLE TEST  . Check for any DTCs. If SYSTEM PASS is obtained, repair is complete. If SYSTEM PASS is not obtained, and if original code is retrieved, go to step 1)  . If different DTC is retrieved, go to DTC TEST INDEX  table.