Wiper Mode Switch Circuit Low
Monitored & Set Condition
- When Monitored: With ignition On.
- Set Condition: The BCM detects a voltage less than .25-volts on the Wiper Mode Switch input for more than 5 seconds.
Possible Causes:
- Intermittent Condition
- Multifunction Switch Shorted
- Front Wiper Switch MUX Circuit Short To Ground
- Body Control Module
Testing
- Turn the ignition on. With the DRBIII(R), clear all BCM DTC's. Turn the Wipers on. With the DRBIII(R), read DTCs. Does the DRBIII(R) display: WIPER MODE SWITCH CIRCUIT LOW? If yes, go to next step. If no, the condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform BODY VERIFICATION TEST .
- Turn the ignition off. Disconnect the Multifunction Switch harness connector. Turn the ignition on. With the DRBIII(R), select Body, Body Control Module and read: Multifunction Switch voltage. Does the DRBIII(R) display: Multifunction Switch voltage above 4.75 volts? If yes, replace the Multifunction Switch. Perform BODY VERIFICATION TEST . If no, go to next step.
- Turn the ignition off. Disconnect the Body Control Module harness connector. Disconnect the Multifunction Switch harness connector. Measure resistance between ground and the Front Wiper Switch MUX circuit. Is the resistance above 5.0 ohms? If yes, repair the Front Wiper Switch MUX Circuit for a short to ground condition. Perform BODY VERIFICATION TEST . If no, replace the Body Control Module. Perform BODY VERIFICATION TEST .