Diagnostic Test

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 step 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. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
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 in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 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) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
  No
  - Replace the Front Control Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure