Part 1
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test P: DTCs B1211:11, B1211:12, B1211:13 and B1211:1A
Refer to Wiring Diagram Set 46, Supplemental Restraint System for schematic and connector information [1][2]Diagrams By Number.
Normal Operation
The Restraints Control Module (RCM) continuously monitors driver safety belt retractor pretensioner and circuits for the following faults:
- Resistance out of range
- Unexpected voltage
- Short to ground
- Faulted driver safety belt retractor pretensioner
If a fault is detected, the RCM (Restraints Control Module) will set and store DTC B1211:11, B1211:12, B1211:13 or B1211:1A in memory and send a message to the Instrument Panel Cluster (IPC) 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 is the deployment loop resistance as 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. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC 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 value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at time of diagnosis. Following this direction will help make sure that minor changes in resistance do not create a repeat concern. This test uses a process of elimination to diagnose each part of the deployment loop circuit including:
- Wiring
- Connections
- Driver safety belt retractor pretensioner
- RCM (Restraints Control Module)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver safety belt retractor pretensioner
- RCM (Restraints Control Module)
PINPOINT TEST P : DTCs B1211:11, B1211:12, B1211:13 AND B1211:1A
WARNING: Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners, adaptive load limiting retractors, or safety belt inflators, which increases the risk of serious personal injury or death.
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification
NOTE: Supplemental Restraint System (SRS) components should only be disconnected or reconnected 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 may set.
NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
P1 RETRIEVE THE RCM (Restraints Control Module) DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Was DTC B1211:11, B1211:12, B1211:13 or B1211:1A retrieved on-demand during self-test?
Yes
This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.
For DTC B1211:13 or B1211:1A, GO to P2.
For DTC B1211:11, GO to P9.
For DTC B1211:12, GO to P11.
No
This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only.
For DTC B1211:13 or B1211:1A, GO to P14.
For DTC B1211:11, GO to P15.
For DTC B1211:12, GO to P16.
P2 CHECK THE DRIVER SAFETY BELT RETRACTOR PRETENSIONER ELECTRICAL CONNECTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Gain access to safety belt retractor pretensioner and inspect for the following:
- the Connector Position Assurance (CPA) tabs are not broken or the clip not damaged.
- the CPA (Connector Position Assurance) clip is fully and correctly seated.
Is the CPA (Connector Position Assurance) clip installed correctly, not damaged or broken and fully seated?
Yes
GO to P3.
No
If the CPA (Connector Position Assurance) clip is damaged or broken, INSTALL a pigtail connector for the pretensioner using pigtail kit (8U2Z-14S411-YA).
If the CPA (Connector Position Assurance) clip is not correctly installed or seated, REPAIR as necessary.
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
P3 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL RESISTANCE (DEPLOY_23_R) PID
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger- RCM (Restraints Control Module).
- DEPLOY_23_R PID
- Monitor and record the resistance value displayed by the DEPLOY_23_R PID.
Does the recorded PID value read between 1.7 and 2.78 ohms?
Yes
GO to P13.
No
GO to P4.
P4 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL RESISTANCE (DEPLOY_23_R) PID WHILE CARRYING OUT THE HARNESS TEST
- While monitoring the DEPLOY_23_R PID carry out the harness test of the driver safety belt retractor pretensioner circuits and accessible connectors (including any in-line connectors) by wiggling connectors and flexing the wire harness frequently.
Does the PID value read between 1.7 and 2.78 ohms while carrying out a harness test?
Yes
DEPOWER the SRS (Supplemental Restraint System) and REPAIR the connector, terminals or wire harness as needed.
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
No
For PID value less than 1.7 ohms, GO to P5.
For PID value greater than 2.78 ohms, GO to P7.
P5 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL DTC 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.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Belt Retractor Pretensioner C3338.
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety belt retractor pretensioner disconnected, an open circuit fault would normally be retrieved.
Did the on-demand DTC change from B1211:1A to B1211:13?
Yes
GO to P12.
No
GO to P6.
P6 CHECK FOR A SHORT BETWEEN DRIVER SAFETY BELT RETRACTOR PRETENSIONER CIRCUITS
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: RCM (Restraints Control Module) C2041A and C2041B.
- Measure the resistance between the driver safety belt retractor pretensioner C3338-2, circuit CR120 (BU/OG), harness side and C3338-1, circuit RR120 (BN/GN), harness side.
Is the resistance greater than 10,000 ohms?
Yes
GO to P13.
No
REPAIR circuits CR120 (BU/OG) and RR120 (BN/GN).
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
P7 CHECK THE DRIVER SAFETY BELT RETRACTOR PRETENSIONER CIRCUITS FOR AN OPEN
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Drive Safety Belt Retractor Pretensioner C3338.
- Disconnect: RCM (Restraints Control Module) C2041A and C2041B.
- Measure the resistance between RCM (Restraints Control Module) C2041B, harness side and driver safety belt retractor pretensioner C3338, harness side using the following chart:
RCM (Restraints Control Module) Circuit Driver Safety Belt Retractor Pretensioner C2041B-3 CR120 (BU/OG) C3338-2 C2041B-4 RR120 (BN/GN) C3338-1
Are the resistances less than 0.5 ohm?
Yes
GO to P8.
No
REPAIR circuit CR120 (BU/OG) or RR120 (BN/GN).
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
P8 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (OPEN 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.
- Connect: RCM (Restraints Control Module) C2041A and C2041B.
- Connect a fused jumper wire between the driver safety belt retractor pretensioner C3338-2, circuit CR120 (BU/OG), harness side and C3338-1, circuit RR120 (BN/GN), harness side.
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety belt retractor pretensioner circuits shorted together, a low resistance fault would normally be retrieved.
Did the on-demand DTC change from B1211:13 to B1211:1A?
Yes
GO to P12.
No
GO to P13.
P9 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND 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.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Belt Retractor Pretensioner C3338.
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety belt retractor pretensioner disconnected, an open circuit fault would normally be retrieved.
Did the on-demand DTC change from B1211:11 to B1211:13?
Yes
GO to P12.
No
GO to P10.
P10 CHECK THE DRIVER SAFETY BELT RETRACTOR PRETENSIONER CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: RCM (Restraints Control Module) C2041A and C2041B.
- Measure the resistance between the driver safety belt retractor pretensioner:
- C3338-2, circuit CR120 (BU/OG), harness side and ground.
- C3338-1, circuit RR120 (BN/GN), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to P13.
No
REPAIR circuit CR120 (BU/OG) or RR120 (BN/GN).
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
P11 CHECK THE DRIVER SAFETY BELT RETRACTOR PRETENSIONER CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Belt Retractor Pretensioner C3338.
- Disconnect: RCM (Restraints Control Module) C2041A and C2041B.
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Measure the voltage between the driver safety belt retractor pretensioner:
- C3338-2, circuit CR120 (BU/OG), harness side and ground.
- C3338-1, circuit RR120 (BN/GN), harness side and ground.
Is voltage present on either circuit?
Yes
REPAIR circuit CR120 (BU/OG) or RR120 (BN/GN).
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information [1][2]Diagrams By Number.
GO to P18.
No
GO to P13.