B2108

B2108-IGNITION SWITCH SENSE INPUT CIRCUIT LOW





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

With the Instrument Cluster awake.

- Set Condition:

Ignition Switch Sense circuit voltage less than .3 volts.





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.

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 OPERATION OF IGNITION SWITCH





Turn the ignition off.

Disconnect the Ignition Switch harness connector.

Connect a jumper wire between Ignition Switch harness connector cavities 3 and 5.

NOTE: This will provide power to the vehicle systems with the ignition switch disconnected.

With the scan tool, erase Instrument Cluster DTCs.

Wait 30 seconds.

With the scan tool, read Instrument Cluster DTCs.

Does the scan tool display-B2109-IGNITION SWITCH SENSE INPUT CIRCUIT HIGH?

Yes

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

No

- Go To 3

3.CHECK THE (G20) IGNITION SWITCH SENSE CIRCUIT FOR A SHORT TO THE (G900) IGNITION SWITCH SENSE RETURN CIRCUIT





Remove the jumper wire between Ignition Switch harness connector cavities 3 and 5.

Disconnect the Instrument Cluster C2 harness connector.

Measure the resistance between the (G20) Ignition Switch Sense Circuit and the (G900) Ignition Switch Sense Return circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (G20) Ignition Switch Sense Circuit for a short to the (G900) Ignition Switch Sense Return circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4.CHECK THE (G20) IGNITION SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND





Measure the resistance between ground and the (G20) Ignition Switch Sense Circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (G20) Ignition Switch Sense Circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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