Diagnostic Test

Turn the ignition on.

With the scan tool, record and erase DTC's

Operate the Heated Seat Switch several times.

Cycle the ignition from on to off.

Turn the ignition on.

With the scan tool, read DTC's.

Does the scan tool display B10BB LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK? 

Yes 

1. Go To  2).

No 

1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1 ).

Fig 1: Switch Bank Connector

Courtesy of DAIMLERCHRYSLER CORP.

With the scan tool, erase DTC's.

Disconnect the Switch Bank connector.

With the scan tool, read DTC's.

Does the scan tool display B10BB - LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK? 

No 

1. Replace the Switch Bank.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1 ).

Yes 

1. Go To  3).

Fig 2: Measuring Resistance Between Ground & LIN Bus Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Cluster C3 connector.

Measure the resistance between ground and the (D506) LIN Bus circuit.

Is the resistance below 10000.0 ohms? 

Yes 

1. Repair the (D506) LIN Bus circuit for a partial short to ground.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1 ).

No 

1. Replace the Instrument Cluster in accordance with service information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1 ).