B212C-IGNITION RUN/START INPUT CIRCUIT OPEN

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition in the Run-Start position.
Set Condition:
If voltage on the (F201) Fused Run/Start Relay Output circuit drops below 6.0 +/- 0.25 volts.

Possible Causes

(F201) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN

(F201) FUSED RUN/START RELAY OUTPUT CIRCUIT SHORTED TO GROUND

OPEN TIPM FUSE 35

TOTALLY INTEGRATED POWER MODULE (TIPM)

OCCUPANT RESTRAINT CONTROLLER (ORC)

Diagnostic Test

1. VERIFY THAT DTC B212C-IGNITION RUN/START INPUT CIRCUIT OPEN IS ACTIVE IN THE ORC.

NOTE: Ensure the battery is fully charged.

Turn the ignition on.
Wait 10 seconds.
With the scan tool, read Occupant Restraint Controller (ORC) DTC.

Does the scan tool display active: B212C-IGNITION RUN/START INPUT CIRCUIT OPEN?

Yes

Go To 2

Go To 8

2. INSPECT AIRBAG RUN-START FUSE

Turn the ignition off.
Remove the Airbag Run-Start TIPM Fuse 35 from the TIPM and inspect the fuse.

NOTE: Check connectors - Clean and repair as necessary.

Is the Run/Start fuse open?

Yes

Go To 3

Go To 5

3. CHECK (F201) FUSED RUN/START RELAY OUTPUT (RUN-START) CIRCUIT RESISTANCE

Measure the resistance of the (F201) Fused Run/Start Relay Output circuit between ground and the Airbag Run-Start Fuse 35 (output side) terminal.

Is the resistance below 100.0 ohms?

Yes

Go To 4

Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
Replace Airbag Run-Start TIPM Fuse 35.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

4. CHECK (F201) FUSED RUN/START RELAY OUTPUT CIRCUIT RESISTANCE WITH ORC DISCONNECTED

WARNING: If the Occupant Restraint Controller is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect both ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-32-L Adaptor to the ORC connectors.
Measure the resistance of the (F201) Fused run/Start Relay Output circuit between C2-32 of the 8443-32-L Adaptor and ground.

Is the resistance below 100.0 ohms?

Yes

Repair the (F201) Fused Run/Start Relay Output circuit for a short to ground.
Replace the Airbag Run-Start TIPM Fuse 35.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

Replace the ORC in accordance with the Service Information.
Replace the Airbag Run-Start TIPM Fuse 35.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

5. CHECK AIRBAG RUN/START TIPM FUSE 35 SUPPLY VOLTAGE

Turn the ignition on.
Measure the voltage between Ground and the Airbag Run-Start TIPM Fuse 35 (supply side) terminal.

Is the voltage above 6.0 volts?

Yes

Go To 6

Replace the TIPM in accordance with the Service Information.
Perform *BODY SYSTEM VERIFICATION TEST - VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

6. CHECK (F201) FUSED RUN/START RELAY OUTPUT CIRCUIT FOR AN OPEN

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Reinstall the Airbag Run-Start TIPM Fuse 35.
Disconnect the both ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Install the Airbag Load tool ORC 8443-32-L adaptor to the ORC connectors.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

Measure the voltage of the (F201) Fused Run/Start Relay Output circuit between the 8443-32-L connector cavity C2-32 and ground.

Is the voltage above 6.0 volts?

Yes

Replace the ORC in accordance with the Service Information.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

Go To 7

7. CHECK (F201) FUSED RUN/START RELAY OUTPUT CIRCUIT FOR AN OPEN

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the TIPM C6 connector.

NOTE: Check connectors - Clean and repair as necessary.

Measure the resistance of the (F201) Fused Run/Start Relay Output Circuit between the 8443-32-L connector cavity C2-32 and cavity 7 of the TIPM C6 connector.

Is the below 5.0 ohms?

Yes

Replace the TIPM in accordance with the Service Information.

Perform *BODY SYSTEM VERIFICATION TEST - VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Repair the open (F201) Fused Run/Start Relay Output circuit.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

8. TEST FOR INTERMITTENT CONDITION

With the scan tool, record and erase all DTC from all Airbag modules.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent problem.
Reconnect any disconnected components and harness connector.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

With the scan tool, monitor active codes as you work through the following steps.

WARNING: To avoid serious or fatal injury, maintain a safe distance from all airbags while performing the following steps.

Wiggle the wiring harness and connectors of the related airbag circuit or component.
If only stored codes return, continue the test until the problem area has been isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the active DTC in question.

Does the scan tool display any ACTIVE DTC?

Yes

Select appropriate symptom from Symptom List.

No problem found. Erase all codes before returning the vehicle to the customer.