B1225

B1225-REAR WIPER INDICATOR CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

Ignition Run-Start transition to on.

- Set Condition:

Rear Wiper Output status HIGH.





Diagnostic Test

1.CHECK FOR AN ACTIVE DTC

Turn the ignition on.

With the scan tool, record and erase DTCs.

Activate the rear wiper switch.

Wait 30 seconds.

With the scan tool, read DTCs.

Is the DTC active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2.CHECK THE (W213) REAR WIPER INDICATOR DRIVER CIRCUIT FOR AN OPEN





Turn the ignition off.

Disconnect the Instrument Cluster C3 harness connector.

Measure the resistance of the (W213) Rear Wiper Indicator Driver Circuit between the Instrument Cluster Harness connector and the Switch Bank harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (W213) Rear Wiper Indicator Driver Circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3.CHECK THE OPERATION OF THE REAR WIPER SWITCH





Turn the ignition on.

Reconnect the Switch Bank harness connector.

Measure the voltage on the (W213) Rear Wiper Indicator Driver Circuit at the Instrument Cluster C3 harness connector.

Is the voltage above 10.0 volts?

Yes

- Replace the Instrument Cluster.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Switch Bank.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test