B0101-17
B101-17-POWER SUPPLY - CIRCUIT VOLTAGE ABOVE THRESHOLD
Special Tools:
For a complete wiring diagram, consult 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 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 Controller (ORC) Module detects that voltage on the power feed circuit is above 18 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 Body?
Yes
- Testing and Inspection for Charging System diagnostic procedures.
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. INSPECT THE BODY CONTROL MODULE 60A MAXI FUSE
1. Remove the ORC battery fuse from the Body Control Module and inspect the fuse.
NOTE: Check connectors - Clean and repair as necessary.
Is the fuse open?
Yes
- Replace the ORC 60A Maxi fuse, then Go To 7
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Go To 4
4. CHECK FOR BATTERY VOLTAGE AT THE INPUT SIDE OF THE BODY CONTROL MODULE 60A MAXI FUSE
1. Remove the Body Control Module fuse (60A Maxi) and check for battery voltage on the input side of the fuse block and ground.
Is the voltage above 18.0 ± 0.5 of a volt on the Body Control Module fuse input circuit?
Yes
- Go To 5
No
- Replace the Body Control Module and reinstall fuse. Body Control Module - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
5. CHECK BODY CONTROL MODULE (F721) IGN 1 FUSED RUN CIRCUIT FOR VOLTAGE TO THE ORC CONNECTOR
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Disconnect the ORC harness connectors.
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 connectors.
3. Reinstall the Body Control Module 60A Maxi fuse.
WARNING: Turn the ignition on then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
4. Measure the voltage of the (F721) IGN 1 Run Fused circuit at the C1-8 terminal of the 56 Way ACM Adapter (8443-25)and ground.
Is the voltage above 18.0 ± 0.5 of a volt?
Yes
- Go To 7
No
- Go To 6
6. CHECK FOR AN OPEN (F721) IGN 1 FUSED RUN CIRCUIT
1. Disconnect the Fused circuit from the Body Control Module.
2. Measure the resistance between the Fused output run circuit at the Body Control Module terminal C3 - 6 and the Fused circuit of the 56 Way ACM Adapter (8443-25) terminal C1 - 8.
Is the resistance 10 Ohms or less?
Yes
- Replace the BCM 60A Maxi fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Repair the Fused circuit for an open.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.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
7. INSPECT THE BODY CONTROL MODULE 60A MAXI IGN 1 FUSED RUN FUSE
1. Remove the BCM 60A Maxi fuse from the body control module and inspect the fuse.
NOTE: Check connectors - Clean and repair as necessary.
Is the BCM 60A Maxi fuse open?
Yes
- Replace BCM 60A Maxi fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Go To 8
8. CHECK FOR BATTERY VOLTAGE AT THE INPUT SIDE OF THE BODY CONTROL MODULE 60A MAXI FUSE
1. Remove the BCM 60A Maxi fuse and turn the ignition on. Check for battery voltage on the input side of the fuse block and ground.
2. Check for battery voltage on the input side of the fuse block and ground.
Is the voltage above 18.0 ± 0.5 of a volt on the Fused Ignition Switch Output (Run) circuit?
Yes
- Repair the Fuse circuit for an open.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 and reinstall fuse.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.