FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Ford Truck >> 2012 >> Explorer FWD L4-2.0L Turbo >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B13B3 >> B13B3:13 >> Part 1

Part 1




Diagnostic Routine AG

Diagnostic Overview

B13B3:11, B13B3:12, B13B3:13, B13B3:1A

Refer to Wiring Diagram Set 46 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The RCM (Restraints Control Module) continuously monitors the second row left safety belt inflator and circuits for the following faults:

- Resistance out of range

- Unexpected voltage

- Short to ground

- Faulted second row left safety belt inflator

If a fault is detected, the RCM (Restraints Control Module) stores DTC (Diagnostic Trouble Code) B13B3:11, B13B3:12, B13B3:13 or B13B3:1A in memory and sends a message to the IPC (Instrument Panel Cluster) to illuminate the air bag warning indicator.

The RCM (Restraints Control Module) analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID (Parameter Identification) is the deployment loop resistance measured by the RCM (Restraints Control Module). If the value displayed is lower or higher than the desired range (refer to diagram below), the RCM (Restraints Control Module) can set a DTC (Diagnostic Trouble Code). As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC (Diagnostic Trouble Code) increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID (Parameter Identification) value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC (Diagnostic Trouble Code) at the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern. This test uses process of elimination to diagnose each part of the deployment loop circuit including:

- Wiring

- Connections

- Second Row Left Safety Belt Inflator

- RCM (Restraints Control Module)





DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- Inspect for damaged wiring harness(es)

- Inspect for loose or damaged connectors

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 disassemble or tamper with seat belt deployable components, including pretensioners, load limiters and inflators. Never back probe deployable device electrical connectors. Tampering or back probing may cause an accidental deployment and result in 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 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. Ignition ON.

2. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).

Was DTC (Diagnostic Trouble Code) B13B3:11, B13B3:12, B13B3:13 or B13B3:1A retrieved on-demand during self-test?








2. CHECK THE SECOND ROW LEFT INFLATABLE SEATBELT DEPLOYMENT CONTROL RESISTANCE (DEPLOY_27_R) PID (Parameter Identification)

1. Using a scan tool, view RCM (Restraints Control Module) PIDs (Parameter Identifications).

2. Measure and record the resistance value displayed by the DEPLOY_27_R PID (Parameter Identification).

Does the PID (Parameter Identification) value read between 1.7 and 2.78 ohms?








3. CHECK THE SECOND ROW LEFT INFLATABLE SEATBELT DEPLOYMENT CONTROL RESISTANCE (DEPLOY_27_R) PID (Parameter Identification) WHILE CARRYING OUT THE HARNESS TEST

1. While monitoring the DEPLOY_27_R PID (Parameter Identification), carry out the harness test of the second row left inflatable safety belt circuits and accessible connectors (including any inline connectors), by wiggling connectors and flexing the wire harness frequently.

Does the PID (Parameter Identification) value read between 1.7 and 2.78 ohms while carrying out the harness test?








4. CHECK THE SECOND ROW LEFT INFLATABLE SEATBELT DEPLOYMENT CONTROL DTC (Diagnostic Trouble Code) FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED)

NOTE: This pinpoint test step will attempt 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 REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

3. Vehicles equipped with a 40 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Remove 5 screws and the seat track inboard inner and outer covers.
- Detach the cushion cover front and inboard retainers.
- Lift the cushion cover and foam pad.

4. Vehicles equipped with a 60 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Detach the cushion cover retainers and position the cushion cover aside.

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 REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

6. Ignition ON.

7. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).

8. DIAGNOSTIC TIP: When viewing DTCs (Diagnostic Trouble Codes) with the second row left safety belt inflator disconnected, an open circuit fault is normally retrieved.

Did the on-demand DTC (Diagnostic Trouble Code) change from B13B3:1A to B13B3:13?








5. CHECK FOR A SHORT BETWEEN SECOND ROW LEFT SAFETY BELT INFLATOR CIRCUITS

1. Ignition OFF.

2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

3. Disconnect RCM (Restraints Control Module) C310A and C310B.

4. Measure:





Is the resistance greater than 10,000 ohms?








6. CHECK THE SECOND ROW LEFT SAFETY BELT INFLATOR CIRCUITS FOR AN OPEN

1. Ignition OFF.

2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

3. Vehicles equipped with a 40 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Remove 5 screws and the seat track inboard inner and outer covers.
- Detach the cushion cover front and inboard retainers.
- Lift the cushion cover and foam pad.

4. Vehicles equipped with a 60 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Detach the cushion cover retainers and position the cushion cover aside.

5. Disconnect RCM (Restraints Control Module) C310A and C310B.

6. Measure:





Are the resistances less than 0.5 ohm?








7. CHECK THE SECOND ROW LEFT INFLATABLE SEATBELT DEPLOYMENT CONTROL DTC (Diagnostic Trouble Code) FOR A FAULT STATUS CHANGE (OPEN INDICATED)

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. Connect RCM (Restraints Control Module) C310A and C310B.

2. Connect a fused jumper wire:





3. 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 REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

4. Ignition ON.

5. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).

6. DIAGNOSTIC TIP: When viewing DTCs (Diagnostic Trouble Codes) with the second row left safety belt inflator circuits shorted together, a low resistance fault is normally retrieved.

Did the on-demand DTC (Diagnostic Trouble Code) change from B13B3:13 to B13B3:1A?








8. CHECK THE SECOND ROW LEFT INFLATABLE SEATBELT DEPLOYMENT CONTROL DTC (Diagnostic Trouble Code) FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)

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 REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

3. Vehicles equipped with a 40 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Remove 5 screws and the seat track inboard inner and outer covers.
- Detach the cushion cover front and inboard retainers.
- Lift the cushion cover and foam pad.

4. Vehicles equipped with a 60 percent second row left seat: Disconnect Second Row Left Safety Belt Inflator C3644.

- Detach the cushion cover retainers and position the cushion cover aside.

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 REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

6. Ignition ON.

7. Using a scan tool, perform RCM (Restraints Control Module) self-test to retrieve DTCs (Diagnostic Trouble Codes).

8. DIAGNOSTIC TIP: When viewing DTCs (Diagnostic Trouble Codes) with the second row left safety belt inflator disconnected, an open circuit fault is normally retrieved.

Did the on-demand DTC (Diagnostic Trouble Code) change from B13B3:11 to B13B3:13?






9. CHECK THE SECOND ROW LEFT SAFETY BELT INFLATOR CIRCUITS FOR A SHORT TO GROUND

1. Ignition OFF.

2. Depower the SRS (Supplemental Restraint System). REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .

3. Disconnect RCM (Restraints Control Module) C310A and C310B.

4. Measure:






Are the resistances greater than 10,000 ohms?




pro multis Credits:Operation CHARM About Operation CHARM