B2100

B2100-IGNITION RUN/START INPUT CIRCUIT PERFORMANCE





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Anytime the ignition input is compared against the CAN B Bus ignition status message.

- Set Condition:
The Front Control Module will set this DTC if the CAN bus message and the hardwired ignition circuit do not match.





1. CHECK FOR ACTIVE DTC

NOTE: If B2104 or B2105 are active, perform those tests first before proceeding.

NOTE: Check the Junction Block Fuse #24. An open fuse can cause this DTC to set. If open consult the Wiring Information to help isolate a possible shorted circuit.

1. With the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 10 seconds.
3. With the scan tool, read the active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
- Perform the BODY VERIFICATION TEST Body Verification Test.

2. (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the IPM C2 connector.
3. Turn the ignition on.
4. Measure the voltage of the (F942) Fused Ignition Switch Output circuit in the IPM C2 connector.

Is the voltage above 10.0 volts?

Yes

- Go To 3

No

- Repair the (F942) Fused Ignition Switch Output circuit for an open.
- Perform the BODY VERIFICATION TEST Body Verification Test.

3. (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN




1. Turn the ignition off.
2. Remove the FCM from the Integrated Power Module.

NOTE: Reconnect the IPM C2 connector.

3. Turn the ignition on.
4. Measure the voltage of the (F942) Fused Ignition Switch Output circuit in the Front Control IPM connector.

Is the voltage above 10.0 volts?

Yes

- Replace and program the Front Control Module.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Replace the Integrated Power Module.
- Perform the BODY VERIFICATION TEST Body Verification Test.