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
1. Go To step 2).
No
1. 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 chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .
2) CHECK FOR VOLTAGE AT THE SWITCH BANK HARNESS CONNECTOR

Fig 1: Checking Fused Ignition Switch Output (Run-Start) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Switch Bank harness connector.

Check the voltage on the (F23) Fused Ignition Switch Output (Run-Start) circuit.

Is the voltage above 10.0 volts?

Yes
1. Go To step 3).
No
1. Repair the (F23) Fused Ignition Switch Output (Run-Start) circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .
3) CHECK THE (W213) REAR WIPER INDICATOR DRIVER CIRCUIT FOR AN OPEN

Fig 2: Checking Rear Wiper Indicator Driver Circuit
Courtesy of DAIMLERCHRYSLER CORP.

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
1. Repair the (W213) Rear Wiper Indicator Driver Circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .
No
1. Go To step 4).
4) CHECK THE OPERATION OF THE REAR WIPER SWITCH

Fig 3: Checking Rear Wiper Indicator Driver Circuit
Courtesy of DAIMLERCHRYSLER CORP.

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
1. Replace and program the Instrument Cluster. Refer to INSTRUMENT CLUSTER - SERVICE INFORMATION .
2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .
No
1. Replace the Switch Bank. Refer to INSTRUMENT PANEL SWITCH POD .
2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .