B2109

B2109-IGNITION SWITCH SENSE INPUT CIRCUIT HIGH

For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

With the Instrument Cluster awake.

- Set Condition:

Ignition Switch Sense circuit voltage greater than 4.7 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 THE (G20) IGNITION SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE

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

Disconnect the Instrument Cluster C2 harness connector.

Measure the voltage of the (G20) Ignition Switch Sense Circuit.

Is the voltage above 5.4 volts?

Yes

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

No

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

4.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.

Connect a jumper wire between Ignition Switch harness connector cavities 1 and 2.

With the scan tool, erase Instrument Cluster DTCs.

Wait 30 seconds.

With the scan tool, read Instrument Cluster DTCs.

Does the scan tool display-B2108-IGNITION SWITCH SENSE INPUT CIRCUIT LOW?

Yes

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

No

- Go To 5

5.CHECK THE (G900) IGNITION SWITCH SENSE RETURN CIRCUIT FOR AN OPEN.

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

Disconnect the Instrument Cluster C2 harness connector.

Measure the resistance of the (G900) Ignition Switch Sense Return circuit between the Instrument Cluster C2 harness connector and the Ignition Switch Harness connector.

Is the resistance greater than 5 ohms?

Yes

- Repair the (G900) Ignition Switch Sense Return circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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