Diagnostic Routine AB
Diagnostic Routine AB
Diagnostic Overview
B00D5:12 and B00D5:14
Refer to Wiring Diagram Set 46 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
The RCM (Restraints Control Module) briefly activates the PAD (Passenger Air Bag Deactivation) indicator to prove-out and verify to the occupants correct functional operation of the PAD (Passenger Air Bag Deactivation) indicator.
The RCM (Restraints Control Module) continuously monitors the PAD (Passenger Air Bag Deactivation) indicator circuits for the following faults:
- Open circuit
- Short to voltage
- Short to ground
- Faulted PAD (Passenger Air Bag Deactivation) indicator
If a fault is detected, the RCM (Restraints Control Module) stores DTC (Diagnostic Trouble Code) B00D5:12 or B00D5:14 in memory and sends a message to the IPC (Instrument Panel Cluster) to illuminate the air bag warning indicator.
DTC Fault Trigger Conditions
Pinpoint Test
WARNING: Do not handle, move or change the original horizontal mounting position of the RCM (Restraints Control Module) while the RCM (Restraints Control Module) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy(R) and cause serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy(R) or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE:Only disconnect or reconnect SRS (Supplemental Restraint System) components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS (Supplemental Restraint System).
NOTE: Always make sure the correct SRS (Supplemental Restraint System) component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford Catalog Advantage(TM) or equivalent to make sure the correct component is being installed. If an incorrect SRS (Supplemental Restraint System) component is installed, DTCs (Diagnostic Trouble Codes) may set.
NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
1. RETRIEVE RCM (Restraints Control Module) DTCs (Diagnostic Trouble Codes)
1. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).
Was DTC (Diagnostic Trouble Code) B00D5:12 or B00D5:14 retrieved on-demand during self-test?
2. CHECK THE PAD (Passenger Air Bag Deactivation) INDICATOR CIRCUIT FOR A SHORT TO GROUND
1. Ignition OFF.
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
2. Disconnect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
3. Measure:
Is the resistance greater than 10,000 ohms?
3. CHECK THE RCM (Restraints Control Module) FOR LOW RESISTANCE
1. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
2. Disconnect RCM (Restraints Control Module) C310A and C310B.
3. Measure:
Is the resistance greater than 10,000 ohms?
4. CHECK THE PAD (Passenger Air Bag Deactivation) INDICATOR CIRCUIT FOR AN OPEN
1. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
2. Disconnect RCM (Restraints Control Module) C310A and C310B.
3. Disconnect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
4. Measure:
Is the resistance less than 0.5 ohm?
5. CHECK THE IGNITION CIRCUIT AT THE PAD (Passenger Air Bag Deactivation) INDICATOR FOR VOLTAGE
1. Repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
2. Ignition ON.
3. Measure:
Is the voltage greater than 10 volts?
6. CHECK THE PAD (Passenger Air Bag Deactivation) INDICATOR
1. Ignition OFF.
2. Connect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
3. Connect a fused jumper wire:
4. Repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
5. Ignition ON.
6. Monitor the PAD (Passenger Air Bag Deactivation) indicator.
Does the PAD (Passenger Air Bag Deactivation) indicator illuminate?
7. CHECK THE PAD (Passenger Air Bag Deactivation) INDICATOR CIRCUIT FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
3. Disconnect RCM (Restraints Control Module) C310A and C310B.
4. Disconnect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
5. Repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
6. Ignition ON.
7. Measure:
Is any voltage present?
8. CHECK THE RCM (Restraints Control Module)
NOTE: This pinpoint test step attempts to change the fault reported by the RCM (Restraints Control Module) by inducing a different fault condition. If the fault reported changes, this indicates the RCM (Restraints Control Module) is functioning correctly and is not the source of the fault.
1. Ignition OFF.
2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
3. Connect RCM (Restraints Control Module) C310A and C310B.
4. Repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
5. Ignition ON.
6. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).
7. DIAGNOSTIC TIP: When viewing DTCs (Diagnostic Trouble Codes) with the PAD (Passenger Air Bag Deactivation) indicator disconnected, an open circuit fault is normally retrieved.
Did the on-demand DTC (Diagnostic Trouble Code) change from B00D5:12 to B00D5:14?
9. CONFIRM THE RCM (Restraints Control Module) FAULT
NOTE: Make sure all restraint system components and the RCM (Restraints Control Module) electrical connectors are connected before carrying out the self-test. If not, DTCs (Diagnostic Trouble Codes) will be recorded.
1. Ignition OFF.
2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
3. Prior to reconnecting any previously disconnected SRS (Supplemental Restraint System) component:
- inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damaged, pinched, cut or pierced wires.
- inspect RCM (Restraints Control Module) C310A and C310B CPA (Connector Position Assurance) lever/lock for correct operation. REFER to Restraints Control Module (RCM). Service and Repair
- repair any concerns found. Refer to Wiring Diagram Set 5 for schematic and connector information Electrical Diagrams.
4. Connect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
5. Connect RCM (Restraints Control Module) C310A and C310B (if previously disconnected).
6. Repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
7. Ignition ON.
8. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).
Was the original DTC (Diagnostic Trouble Code) retrieved on-demand during self-test?
10. CHECK FOR AN INTERMITTENT FAULT
1. Ignition OFF.
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
2. Disconnect PAD (Passenger Air Bag Deactivation) Indicator / Defrost Switch C241.
- Inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
- Inspect wire harness for any damage, pinched, cut or pierced wires.
- Repair any concerns found.
- Refer to Wiring Diagram Set 5 for schematic and connector information Electrical Diagrams.
3. Connect all previously disconnected component(s)/connector(s).
4. Ignition ON.
5. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).
Was DTC (Diagnostic Trouble Code) B00D5:12 or B00D5:14 retrieved on-demand during self-test?
11. CHECK FOR ADDITIONAL SRS (Supplemental Restraint System) DTCs (Diagnostic Trouble Codes)
1. Ignition OFF.
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
2. Reconnect all SRS (Supplemental Restraint System) components (if previously disconnected).
3. If previously directed to depower the SRS (Supplemental Restraint System), repower the SRS (Supplemental Restraint System).Do not prove out the SRS (Supplemental Restraint System) at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) . Service and Repair
4. Ignition ON.
5. Using a scan tool, perform theRestraints self-test to retrieve DTCs (Diagnostic Trouble Codes).
NOTE: When selecting Restraints from the Self Test menu, DTCs (Diagnostic Trouble Codes) are retrieved from the RCM (Restraints Control Module) and OCSM (Occupant Classification System Module).
Are any RCM (Restraints Control Module) and/or OCSM (Occupant Classification System Module) DTCs (Diagnostic Trouble Codes) retrieved on-demand during self-test?
