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B106B–REAR DEFROST CONTROL CIRCUIT LOW (ATC) (CONTINUED) For the Automatic Temperature Control (ATC) circuit diagram (Refer to 24 - HEATING & AIR CONDITIONING - For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT SHORTED TO GROUND (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT OPEN REAR WINDOW DEFOGGER RELAY A/C HEATER CONTROL NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC Diagnostic Test 1. INSTALL A SUBSTITUTE REAR WINDOW DEFOGGER RELAY & THEN CHECK FOR DTC B106B–REAR Turn the ignition on. Verify that the EBL mode switch is off. Turn the ignition off. Install a substitute Rear Window Defogger Relay. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display: B106B–REAR DEFROST CONTROL Yes >> Go To 2 No >> Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 24 - 260 HVAC - ELECTRICAL DIAGNOSTICS WK |