B212D-IGNITION RUN ONLY INPUT CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition in the Run position.
- Set Condition:
If voltage on the (F100) Fused Ignition Switch Output (RUN) circuit drops below 6.0 volts.
| Possible Causes |
| TIPM FUSE 27 OPEN |
| TIPM FUSE 27 SUPPLY VOLTAGE LOW |
| (F100) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN |
| (F100) FUSED RUN RELAY OUTPUT CIRCUIT SHORT TO GROUND |
| OCCUPANT RESTRAINT CONTROLLER (ORC) |
Diagnostic Test
1. VERIFY THAT DTC B212D-IGNITION RUN ONLY INPUT CIRCUIT OPEN IS ACTIVENOTE: Ensure the battery is fully charged.
Turn the ignition on.
Wait 10 seconds.
With the scan tool, read Occupant Restraint Controller (ORC) and Occupant Classification Module (OCM) DTCs.
Does the scan tool display active: B212D-IGNITION RUN ONLY INPUT CIRCUIT OPEN?
Yes
- Go To 2
No
- Go To 8
2. INSPECT AIRBAG RUN CIRCUIT FUSE
Turn the ignition off.
Remove the TIPM Fuse 27 and inspect the fuse.
NOTE: Check connectors - Clean and repair as necessary.
Is the fuse open?
Yes
- Go To 3
No
- Go To 5
3. CHECK (F100) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT SHORT TO GROUND
Measure the resistance of the (F100) Fused Ignition Switch Output (Run) circuit between the TIPM Fuse 27 (output side) terminal and ground.
Is the resistance below 100.0 ohms?
Yes
- Go To4
No
- 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 TIPM Fuse 27.
- Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
4. CHECK (F100) FUSED IGNITION SWITCH OUTPUT (RUN) 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 personal injury or death.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
Connect the Load Tool ORC 8443-25 Adapter to the ORC connectors.
Measure the resistance of the (F100) Fused Ignition Switch Output (Run) circuit between 8443-25 Adapter cavity C2-18 and ground.
Is the resistance below 100.0 ohms?
Yes
- Repair the (F100) Fused Ignition Switch Output (Run) circuit for a short to ground.
- Replace the TIPM Fuse 27.
- Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
- Replace the ORC in accordance with the Service Information.
- Replace the TIPM Fuse 27.
- Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
5. CHECK TIPM FUSE 27 SUPPLY SIDE CIRCUIT VOLTAGE
Turn the ignition on.
Measure the voltage of the TIPM Fuse 27 (supply side) of the fuse to ground.
Is the voltage above 6.0 volts?
Yes
- Go To 6
No
- Replace the TIPM in accordance with the Service Information.
- Perform *BODY VERIFICATION TEST - VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
6. CHECK (F100) FUSED IGNITION SWITCH OUTPUT (RUN) OUTPUT CIRCUIT FOR AN OPEN
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Reinstall the TIPM Fuse 27.
Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
Connect the Airbag Load Tool ORC 8443-25 Adapter to the ORC harness connectors.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
Measure the voltage of the (F100) Fused Ignition Switch Output (Run) circuit between the 8443-25 adaptor 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.
No
- Go To 7
7. CHECK FUSE 27 OUTPUT TO CAVITY 7 OF THE TIPM C7 CONNECTOR
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the TIPM C7 connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance of the (F100) Fused Ignition Switch Output (Run) circuit between cavity C2-18 of the 8443-25 adaptor and TIPM C7 cavity 7 connector.
Is the resistance below 5.0 ohms?
Yes
- Replace the ORC in accordance with the Service Information.
- Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
- Replace the TIPM in accordance with the Service Information.
- Perform *BODY VERIFICATION TEST - VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8. TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase all DTCs from all Airbag modules.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
WARNING: To avoid personal injury or death, 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 personal injury or death, 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 personal injury or death, 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 DTCs?
Yes
- Select appropriate symptom from Symptom List.
No
- No problem found. Erase all codes before returning vehicle to customer.