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Theory of Operation The Sunroof Motor/Module supplies a 12 volt supply circuit to the sunroof switch. When the switch is closed to any • When Monitored: • Set Condition: Possible Causes (Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO VOLTAGE (Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO (Q6) SUNROOF SWITCH SUPPLY CIRCUIT SUNROOF SWITCH SHORTED SUNROOF MOTOR/MODULE Diagnostic Test 1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase DTC’s Press and release the Sunroof Switch in all positions several times. Wait 30 seconds. With the scan tool, read DTC’s. Does the scan tool display B1847–SUNROOF VENT SWITCH INPUT CIRCUIT HIGH? Yes >> Go To 2 No >> The conditions that caused this code to set are not present at this time. Check the switch for any bind- ing conditions and using the wiring diagram/schematic as a guide, inspect the wiring and connectors. 2. SUNROOF SWITCH SHORTED With the scan tool, erase DTC’s. Turn the ignition off. Disconnect the Sunroof Switch connector. Turn the ignition on and wait 30 seconds. With the scan tool, read DTC’s. Does the scan tool display B1847–SUNROOF VENT SWITCH Yes >> Go To 3 No >> Replace the Sunroof Switch. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8N - 210 POWER TOP - ELECTRICAL DIAGNOSIS LX |