U0208

U0208-LOST COMMUNICATION WITH HEATED SEATS CONTROL MODULE





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

With the ignition on.

- Set Condition:

The Instrument Cluster does not receive information from the Heated Seats Control Module.





Diagnostic Test

1. CHECK FOR AN ACTIVE DTC

Turn the ignition on.

With the scan tool, record and erase DTCs.

Wait 30 seconds.

With the scan tool, read DTCs.

Does the scan tool display the DTC as 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. (D506) LIN BUS CIRCUIT OPEN





Turn the ignition off.

Disconnect the Heated Seats Module harness connector.

Turn the ignition on.

Measure the voltage of the (D506) LIN BUS circuit.

Is the voltage above 5 volts?

Yes

- Go To 4

No

- Go To 3

3. (D506) LIN BUS CIRCUIT OPEN





Turn the ignition off.

Disconnect the Instrument Cluster C2 harness connector.

Turn the ignition on.

Measure the resistance of the (D506) LIN BUS circuit.

Is the resistance below 10K ohms?

Yes

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

No

- Repair the (D506) LIN BUS circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. (P693) HEATED SEAT MODULE SUPPLY





Using a 12-volt test light connected to ground, check the (P693) Heated Seat Module Supply circuit.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the (P693) Heated Seat Module Supply circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. (Z914A) GROUND CIRCUIT OPEN





Using a 12-volt test light connected to 12 volts, check the (Z914A) Ground circuit.

Does the test light illuminate brightly?

Yes

- Replace the Heated Seats Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (Z914A) ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test