Diagnostic Test

(W12) REAR WIPER RELAY CONTROL CIRCUIT SHORT TO B+
1. Measure the resistance between ground and the (W12) Rear Wiper Relay Control circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (W12) Rear Wiper Relay Control circuit for a short to B+.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 2
INTEGRATED POWER MODULE
1. Turn the ignition off.
2. Replace the Rear Wiper relay with a known good relay.
3. With the Scan Tool, clear all TIPM DTC's.
4. Turn the Rear Wipers ON then OFF.
5. With the Scan Tool, read the TIPM DTC's.
  Does the Scan Tool read: B231C-REAR WIPER MOTOR CONTROL CIRCUIT HIGH?
  
  Yes
  - Replace the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Rear Wiper Relay in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .