U113B

U113B-LOST COMMUNICATION WITH SWITCH BANK MODULE





For a complete wiring diagram, refer to the wiring information .

- When Monitored:
With the ignition on.

- Set Condition:
The Cluster does not receive information from the Switch Bank Module.





1. CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this 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 the BODY VERIFICATION TEST. Body Verification Test.

2. (D506) LIN BUS CIRCUIT




1. Turn the ignition off.
2. Disconnect the Switch Bank Module harness connector.
3. Turn the ignition on.
4. 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




1. Turn the ignition off.
2. Disconnect the Cluster C2 harness connector.
3. Measure the resistance of the (D506) LIN BUS circuit.

Is the resistance below 10k Ohms?

Yes

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

No

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

4. (A909) FUSED B+ CIRCUIT OPEN




1. Turn the ignition on.
2. Measure the voltage of the (A909) Fused B+ circuit at the Switch Bank Module harness connector.

Is the voltage above 10 volts?

Yes

- Go To 5

No

- Repair the (A909) Fused B+ circuit for an open. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (Z911) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Using an Ohm meter, measure the resistance between ground and the (Z911) Ground circuit at the Switch Bank Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the (Z911) ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.