B2318

B2318-WIPER HIGH/LOW CONTROL CIRCUIT HIGH





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
When the Front Control Module (FCM) detects a high condition in the wiper high/low control circuit.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all Front Control Module (FCM) DTCs.
3. Turn the Wipers to Low then High.
4. With the scan tool, read the Wiper DTCs.

Does the scan tool read: B2318-WIPER HIGH/LOW CONTROL CIRCUIT HIGH?

Yes

- Go To 2

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 the BODY VERIFICATION TEST. Body Verification Test.

2. WIPER HIGH/LOW RELAY
1. Turn the ignition off.
2. Remove the Wiper High/Low Relay.
3. Turn the ignition on.
4. Activate the Wiper Switch to all speed positions.
5. With the scan tool, read the DTCs.

Does the Scan Tool read: B2318-WIPER HIGH/LOW CONTROL CIRCUIT HIGH?

Yes

- Replace the Wiper High/Low Relay.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. FRONT CONTROL MODULE (FCM)
1. Turn the ignition off.
2. Remove the Wiper Hi/Low Relay.
3. Disconnect the 49 way FCM IPM harness connector.
4. Measure the voltage between ground and the (W2) Wiper Hi/Low Relay Control circuit in the 49 way FCM IPM harness connector.

Is there any voltage present?

Yes

- Replace the Integrated Power Module (IPM).
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace the Front Control Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test