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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 >> B0002 >> B0002:1A >> Part 1

Part 1




Diagnostic Routine B

Diagnostic Overview

B0002:11, B0002:12, B0002:13 and B0002:1A

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 driver air bag module stage 2 circuits for the following faults:

- Resistance out of range

- Unexpected voltage

- Short to ground

- Faulted driver air bag module

If a fault is detected, the RCM (Restraints Control Module) stores DTC (Diagnostic Trouble Code) B0002:11, B0002:12, B0002:13 or B0002:1A 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

- Clockspring

- Driver air bag module

- 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 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 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) B0002:11, B0002:12, B0002:13 or B0002:1A retrieved on-demand during self-test?








2. CHECK THE DRIVER FRONTAL STAGE 2 DEPLOYMENT CONTROL RESISTANCE (DEPLOY_01_R) PID (Parameter Identification)

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

2. Monitor and record the resistance value displayed by the DEPLOY_01_R PID (Parameter Identification).

Does the PID (Parameter Identification) value read between 2 and 3.68 ohms?








3. CHECK THE DRIVER FRONTAL STAGE 2 DEPLOYMENT CONTROL RESISTANCE (DEPLOY_01_R) PID (Parameter Identification) WHILE CARRYING OUT THE HARNESS TEST

1. Remove the steering column shrouds to access the clockspring connectors. REFER to Steering Column Shroud .

2. While monitoring the DEPLOY_01_R PID (Parameter Identification), carry out the harness test of the driver air bag circuits and accessible connectors (including any inline connectors) by wiggling and flexing the wire harness, connectors, tilting and rotating the steering wheel frequently. Record the resistance value indicated by the PID (Parameter Identification).

Does the PID (Parameter Identification) value read between 2 and 3.68 ohms while carrying out the harness test?








4. CHECK THE DRIVER FRONTAL STAGE 2 DEPLOYMENT CONTROL DTC (Diagnostic Trouble Code) FOR A FAULT STATUS CHANGE (LOW RESISTANCE 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 reported fault 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. Remove the driver air bag module. REFER to Driver Air Bag Module .

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

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 driver air bag module disconnected, open circuit faults are normally retrieved on stages 1 and 2.

Did the on-demand DTC (Diagnostic Trouble Code) change from B0002:1A to B0002:13?








5. CHECK THE DRIVER FRONTAL STAGE 2 DEPLOYMENT CONTROL DTC (Diagnostic Trouble Code) FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED) (CLOCKSPRING DISCONNECTED)

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 reported fault 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. Disconnect Clockspring C218A.

NOTE: Remove the steering column shrouds to access the clockspring connectors. REFER to Steering Column Shroud .

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

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 driver air bag module / clockspring disconnected, open circuit faults are normally retrieved on stages 1 and 2.

Did the on-demand DTC (Diagnostic Trouble Code) change from B0002:1A to B0002:13?








6. CHECK FOR A SHORT BETWEEN DRIVER AIR BAG STAGE 2 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?








7. CHECK THE DRIVER AIR BAG STAGE 2 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. Remove the driver air bag module. REFER to Driver Air Bag Module .

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

5. Measure:





Is the resistance less than 1 ohm?








8. CHECK THE DRIVER AIR BAG STAGE 2 CIRCUITS FOR AN OPEN (CLOCKSPRING DISCONNECTED)

1. Disconnect Clockspring C218A.

NOTE: Remove the steering column shrouds to access the clockspring connectors. REFER to Steering Column Shroud .

2. Measure:





Are the resistances less than 0.5 ohm?








9. CHECK THE DRIVER AIR BAG STAGE 2 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 reported fault 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 driver air bag stage 2 circuits shorted together, a low resistance fault is normally retrieved on stage 2. Stage 1 shows an open circuit fault because the driver air bag is disconnected.

Was DTC (Diagnostic Trouble Code) B0002:1A retrieved on-demand during self-test?








10. CHECK THE DRIVER AIR BAG STAGE 2 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 reported fault 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. Disconnect Clockspring C218A.

NOTE: Remove the steering column shrouds to access the clockspring connectors. REFER to Steering Column Shroud .

4. Connect a fused jumper wire:





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 driver air bag stage 2 circuits shorted together, a low resistance fault is normally retrieved on stage 2. Stage 1 shows an open circuit fault because the driver air bag is disconnected.

Was DTC (Diagnostic Trouble Code) B0002:1A retrieved on-demand during self-test?








11. CHECK THE DRIVER FRONTAL STAGE 2 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 reported fault 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. Remove the driver air bag module. REFER to Driver Air Bag Module .

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

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 driver air bag module disconnected, open circuit faults are normally retrieved on stages 1 and 2.

Did the on-demand DTC (Diagnostic Trouble Code) change from B0002:11 to B0002:13?




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