B0101-16
B0101-16-POWER SUPPLY - CIRCUIT VOLTAGE BELOW THRESHOLD
Special Tools:
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Occupant Restraint Controller (ORC) module receives power from a single fused ignition 1 switch output run circuit from the Body Control Module (BCM). This circuit powers the ORC and the capacitors used to initiate the squib deployment circuits in the event of collision detection.
- When Monitored:
The Occupant Restraint Module (ORC) tests the single power feed circuit starting from 1 second after key on, and then continuously through the ignition cycle.
- Set Condition:
This code is set immediately after the Occupant Restraint Module (ORC) detects that voltage on the single power feed circuit is below 10 volts for greater than 15 seconds. The DTC will go from active to stored when the condition that set the code is not present for five seconds. The Multifunction Indicator Lamp (MIL) will set in the Instrument Cluster.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.
1. CHECK PCM FOR CHARGING SYSTEM DTC
NOTE: Make sure the battery is fully charged.
1. With the scan tool, read Powertrain Control Module DTCs.
Are there any Charging System DTCs set in the Powertrain Control Module?
Yes
- Perform the appropriate diagnostic procedure for the Charging System, Testing and Inspection.
No
- Go To 2
2. DETERMINE ACTIVE OR STORED DTC
1. Turn the ignition on.
2. With the scan tool, read all active ORC DTCs.
Is the DTC active or stored?
ORC - ACTIVE DTC
- Go To 3
ORC - STORED DTC
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. CHECK FOR A SHORT TO GROUND ON THE (F721) FUSED IGN 1 RUN CIRCUIT WITH THE ORC CONNECTED
WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Check the connectors - Clean and repair as necessary.
1. Measure the resistance between the Body Control Module fused IGN 1 run circuit output cavity C6 - 3 and ground.
Is the resistance 100 Ohms or less?
Yes
- Go To 4
No
- Replace the Body Control Module 60A Blue Maxi fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
4. CHECK FOR A SHORT TO GROUND ON THE (F721) FUSED IGN 1 RUN CIRCUIT WITH THE ORC DISCONNECTED
1. Disconnect the ORC harness connector.
NOTE: Check connectors - Clean and repair as necessary.
NOTE: After disconnecting the ORC module and the ORC module body harness connector, check the ORC module body harness connector shorting bar pin location. The shorting bar pin location should be down and not visible through the larger center holes of the ORC module body harness connector.
2. Connect the 56 Way ACM Adapter (8443-25) to the ORC harness connector.
3. Measure the resistance between the Body Control Module (F721) IGN 1 run circuit output terminal C6 - 3 and ground.
Is the resistance 100 Ohms or less on the IGN 1 run circuit ?
Yes
- Go To 5
No
- WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.
- Replace the ORC. Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
5. CHECK FOR A SHORT TO GROUND ON THE (F721) FUSED IGN 1 RUN CIRCUIT WITH THE BODY CONTROL MODULE DISCONNECTED
1. Disconnect the feed circuit from the Body Control Module 60A Maxi Fuse.
2. Measure the resistance between the Fused run circuit at the appropriate terminals of the 56 Way ACM Adapter (8443-25) and ground.
Is the resistance 100 Ohms or less?
Yes
- Repair the Fuse circuit for a short to ground.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 the Body Control Module 60A MAXI Fuse, then Go To 6.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Replace the Body Control Module and reinstall fuse. Body Control Module - Removal
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
6. CHECK FOR A SHORT TO GROUND ON THE (F721) FUSED IGN 1 RUN CIRCUIT WITH THE ORC CONNECTED
WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Check connectors - Clean and repair as necessary.
1. Measure the resistance between the Body Control Module (F721) Fused Ignition Switch Output (Run) Circuit BCM terminal cavity C6 - 3 and ground.
Is the resistance 100 Ohms or less?
Yes
- Repair the Fuse circuit for a short to ground.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.Inspect and possibly replace the Body Control Module 60A MAXI Fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Replace the Body Control Module 60A Maxi fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.