Front Wiper Mode Switch Sense Circuit Short To Ground

When Monitored:

Ignition on.

Set Condition:

This DTC will set if CTM detects a short to ground on the Front Wiper Mode Switch Sense circuit.

Possible Causes:

Intermittent wiring and connections.
Front Wiper Intermittent Mode Switch Sense circuit short to ground.
Fused Ignition Switch Output circuit short to ground.
Junction Block short to ground.
Front Wiper Switch short to ground.
CTM.

CAUTION: Always turn ignition off before disconnecting or connecting any control module connector. Failure to do so could result in damage to control module.

NOTE: Ensure vehicle being tested has a fully charged battery. If it does not, false DTCs or error messages may occur.

NOTE: For component location, see appropriate illustration under COMPONENT LOCATIONS . For terminal identification, see appropriate illustration under CONNECTOR IDENTIFICATION . For circuit and wire color identification, see WIRING DIAGRAMS . For component removal and installation procedures, see appropriate component under REMOVAL & INSTALLATION .

Testing:

Turn ignition off. Connect DRBIII(R) to DLC. Turn ignition on. Using the DRBIII(R), erase DTCs. Cycle the ignition off, then on, leaving ignition on for at least 15 seconds. Operate front wiper system in all modes. Using the DRBIII(R), read DTCs. Does this DTC reset? If yes, go to next step. If no, go to step 6 .
Turn ignition off. Disconnect Front Wiper (Multifunction) Switch harness connector. Disconnect CTM harness connectors. Measure resistance between ground and Multifunction Switch harness connector terminal No. 4. Is resistance less than 5 ohms? If yes, repair Front Wiper Intermittent Wiper Mode Sense circuit for a short to ground. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Reconnect CTM harness connectors. Disconnect Instrument Panel Junction Block C8 harness connector. Measure resistance between ground and Multifunction Switch harness connector terminal No. 18. Is resistance less than 5 ohms? If yes, repair Fused Ignition Switch Output circuit for a short to ground. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Reconnect Multifunction Switch harness connector. Replace Instrument Panel Junction Block fuse No. 5 (20-amp). Turn ignition on. Inspect fuse No. 5. Is fuse No. 5 open? If yes, repair the Junction Block or other shared fused circuits for a short to ground. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Turn ignition off. Disconnect CTM harness connectors. Turn Front Wiper Switch to intermittent position. Measure resistance between ground and CTM C1 harness connector terminal No. 8. Is resistance less than 5 ohms? If yes, replace Multifunction Switch. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, replace CTM. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
The conditions necessary to set this DTC are not present at this time. Problem may be intermittent. Visually inspect related wiring harnesses for any chafed, pierced, pinched or partially broken wires. Visually inspect related harness connectors for broken, bent, pushed out or corroded terminals. Wiggle related wiring harnesses while checking for shorts or open circuits. Repair as necessary. After repair, perform BODY VERIFICATION TEST under VERIFICATION TESTS.