B2100

B2100-IGNITION RUN/START INPUT CIRCUIT/PERFORMANCE

For a complete wiring diagram Consult Diagrams/Electrical.





- When Monitored:
With the ignition on.

- Set Condition:
The BCM detects a performance fault on the (F20) circuit.





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 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 - VER 1. Body Verification Test.

2. BCM




Turn the ignition off.
Disconnect the BCM C1 harness connector.
Turn the ignition on.
Measure the voltage of the (F20) Fused Ignition Switch Output (Run/Start) circuit.
Does the test light illuminate brightly?

Yes

- Replace the BCM.
- PERFORM the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To 3


3. (F20) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT SHORT TO GROUND




Turn the ignition off.
Disconnect the Ignition Switch harness connector.
Measure the resistance between ground and the (F20) Fused Ignition Switch Output (Run/Start) circuit.
Is the resistance below 10K ohms?

Yes

- Repair the (F20) Fused Ignition Switch Output (Run/Start) circuit for a short to ground.
- PERFORM the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To 4

4. (F20) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN




Measure the resistance (F20) Fused Ignition Switch Output (Run/Start) circuit.
Is the resistance above 5.0 ohms?

Yes

- Repair the (F20) Fused Ignition Switch Output (Run/Start) circuit for an open.
- PERFORM the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To 5

5. CHECK (A106) FUSED B+ FOR AN OPEN




Measure the voltage of the (A106) Fused B+ circuit.
Does the test light illuminate brightly?

Yes

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

No

- Repair the (A106) Fused B+ circuit for an open.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test