Pinpoint Test D: DTCs B0020:11, B0020:12, B0020:13 and B0020:1A
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test D: DTCs B0020:11, B0020:12, B0020:13 and B0020:1A
Normal Operation
The Restraints Control Module (RCM) continuously monitors the driver seat side air bag module and circuits for the following faults:
- Resistance out of range
- Unexpected voltage
- Short to ground
- Faulted driver seat side air bag module
If a fault is detected, the RCM (Restraints Control Module) stores DTC B0020:11, B0020:12, B0020:13 or B0020:1A in memory and sends 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 and uses this measurement in combination with an age correction factor 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. The RCM (Restraints Control Module) fault trigger threshold may vary as the vehicle ages. Small variations in resistance can occur due to the effect of road vibrations on terminal fit and/or temperature changes. 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 the time of diagnosis. Following this direction helps 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 seat side air bag module
- RCM (Restraints Control Module)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver seat side air bag module
- RCM (Restraints Control Module)
PINPOINT TEST D : DTCs B0020:11, B0020:12, B0020:13 AND B0020:1A
WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM 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.
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.
NOTE: 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.
D1 RETRIEVE RCM (Restraints Control Module) DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Was DTC B0020:11, B0020:12, B0020:13 or B0020:1A 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 B0020:13 or B0020:1A, GO to D2.
For DTC B0020:11, GO to D8.
For DTC B0020:12, GO to D10.
No
This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only.
For DTC B0020:13 or B0020:1A, GO to D13.
For DTC B0020:11, GO to D14.
For DTC B0020:12, GO to D15.
D2 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID
- Enter the following diagnostic mode on the scan tool: DataLogger- RCM (Restraints Control Module).
- DEPLOY_10_R PID
Does the PID value read between 1.7 and 2.78 ohms?
Yes
GO to D12.
No
GO to D3.
D3 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID WHILE CARRYING OUT THE HARNESS TEST
- While monitoring the DEPLOY_10_R PID, carry out the harness test of the driver seat side air bag 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 the harness test?
Yes
DEPOWER the SRS (Supplemental Restraint System) and REPAIR the connector, terminals or wire harness as needed.
GO to D17.
No
For PID value less than 1.7 ohms, GO to D4.
For PID value greater than 2.78 ohms, GO to D6.
D4 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC 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 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 Seat Side Air Bag Module C3051.
- 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 seat side air bag module disconnected, an open circuit fault would normally be retrieved.
Did the on-demand DTC change from B0020:1A to B0020:13?
Yes
GO to D11.
No
GO to D5.
D5 CHECK FOR A SHORT BETWEEN DRIVER SEAT SIDE AIR BAG 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) C310A and C310B.
- Measure the resistance between driver seat side air bag module C3051-1, circuit CR105 (GN/BU), harness side and C3051-2, circuit RR105 (GY/YE), harness side.
Is the resistance greater than 10,000 ohms?
Yes
GO to D12.
No
REPAIR circuits CR105 (GN/BU) and RR105 (GY/YE). GO to D17.
D6 CHECK THE DRIVER SEAT SIDE AIR BAG 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: Driver Seat Side Air Bag Module C3051.
- Disconnect: RCM (Restraints Control Module) C310A and C310B.
- Measure the resistance between RCM (Restraints Control Module) C310B, harness side and driver seat side air bag module C3051, harness side using the following chart.
RCM (Restraints Control Module) Circuit Driver Seat Side Air Bag Module C310B-6 CR105 (GN/BU) C3051-1 C310B-5 RR105 (GY/YE) C3051-2
Are the resistances less than 0.5 ohm?
Yes
GO to D7.
No
REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to D17.
D7 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC 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.
- Connect: RCM (Restraints Control Module) C310A and C310B.
- Connect a fused jumper wire between driver seat side air bag module C3051-1, circuit CR105 (GN/BU), harness side, and driver seat side air bag module C3051-2, circuit RR105 (GY/YE), 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 seat side air bag module circuits shorted together, a low resistance fault would normally be retrieved.
Did the on-demand DTC change from B0020:13 to B0020:1A?
Yes
REMOVE the fused jumper wire and GO to D11.
No
REMOVE the fused jumper wire and GO to D12.
D8 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC 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.
- 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 Seat Side Air Bag Module C3051.
- 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 seat side air bag module disconnected, an open circuit fault would normally be retrieved.
Did the on-demand DTC change from B0020:11 to B0020:13?
Yes
GO to D11.
No
GO to D9.
D9 CHECK THE DRIVER SEAT SIDE AIR BAG 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) C310A and C310B.
- Measure the resistance between driver seat side air bag module:
- C3051-1, circuit CR105 (GN/BU), harness side and ground.
- C3051-2, circuit RR105 (GY/YE), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to D12.
No
REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to D17.
D10 CHECK THE DRIVER SEAT SIDE AIR BAG 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 Seat Side Air Bag Module C3051.
- Disconnect: RCM (Restraints Control Module) C310A and C310B.
- 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 driver seat side air bag module:
- C3051-1, circuit CR105 (GN/BU), harness side and ground.
- C3051-2, circuit RR105 (GY/YE), harness side and ground.
Is any voltage present?
Yes
REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to D17.
No
GO to D12.
D11 CONFIRM THE DRIVER SEAT SIDE AIR BAG MODULE FAULT
NOTE: Make sure all restraint system components and the RCM (Restraints Control Module) electrical connectors are connected before carrying out self-test. If not, DTCs will be recorded.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Prior to reconnecting any previously disconnected SRS (Supplemental Restraint System) component:
- inspect connector(s) (including any in-line 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 C310BConnector Position Assurance (CPA) lever/lock for correct operation. Refer to Restraints Control Module (RCM) .
- repair any concerns found.
- Connect: Driver Seat Side Air Bag Module C3051.
- 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).
Was the original DTC retrieved on-demand during self-test?
Yes
REMOVE and INSPECT the driver seat side air bag module harness for damage. REFER to Side Air Bag Module . If a concern is found, REPAIR as necessary.
If a concern was not found, INSTALL a new driver seat side air bag module. REFER to Side Air Bag Module . GO to D17.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test.
For DTC B0020:13 or B0020:1A, GO to D13.
For DTC B0020:11, GO to D14.
For DTC B0020:12, GO to D15.
D12 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 will be recorded.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Prior to reconnecting any previously disconnected SRS (Supplemental Restraint System) component:
- inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damage, pinched, cut or pierced wires.
- inspect RCM (Restraints Control Module) C310A and C310BConnector Position Assurance (CPA) lever/lock for correct operation. Refer to Restraints Control Module (RCM) .
- repair any concerns found.
- Connect: Driver Seat Side Air Bag Module C3051 (if previously disconnected).
- Connect: RCM (Restraints Control Module) C310A and C310B (if previously disconnected).
- 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).
Was the original DTC retrieved on-demand during self-test?
Yes
INSTALL a new RCM (Restraints Control Module). REFER to Restraints Control Module (RCM) . GO to D17.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test.
For DTC B0020:13 or B0020:1A, GO to D13.
For DTC B0020:11, GO to D14.
For DTC B0020:12, GO to D15.
D13 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT
- Enter the following diagnostic mode on the scan tool: DataLogger- RCM (Restraints Control Module).
- DEPLOY_10_R PID
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness frequently.
Does the PID value read between 1.7 and 2.78 ohms?
Yes
The fault is not present and cannot be recreated at this time. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to D16.
No
DEPOWER the SRS (Supplemental Restraint System) and REPAIR as necessary.
GO to D17.
D14 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO GROUND FAULT
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness frequently.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Was DTC B0020:11 retrieved on-demand during self-test?
Yes
DEPOWER the SRS (Supplemental Restraint System) and REPAIR as necessary.
GO to D17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to D16.
D15 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO BATTERY 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 Seat Side Air Bag Module C3051.
- 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.
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness frequently.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Was DTC B0020:12 retrieved on-demand during self-test?
Yes
DEPOWER the SRS (Supplemental Restraint System) and REPAIR as necessary.
GO to D17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to D16.
D16 CHECK THE HARNESS AND CONNECTORS
- 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 Seat Side Air Bag Module C3051 (if not previously disconnected).
- inspect connector(s) (including any in-line 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.
- inspect RCM (Restraints Control Module) C310A and C310BCPA (Connector Position Assurance) lever/lock for correct operation. Refer to Restraints Control Module (RCM) .
Were any concerns found?
Yes
REPAIR as necessary.
GO to D17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to D17.
D17 CHECK FOR ADDITIONAL SRS (Supplemental Restraint System) DTCs
- 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.
- Reconnect all SRS (Supplemental Restraint System) components (if previously disconnected).
- 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 Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Are any RCM (Restraints Control Module) DTCs retrieved on-demand during self-test?
Yes
Do not clear any DTCs until all DTCs have been resolved. GO to the DTC Charts for pinpoint test direction. Air Bag Systems
No
CLEAR all RCM (Restraints Control Module) CMDTCs (Continuous Memory Diagnostic Trouble Codes). PROVE OUT the SRS (Supplemental Restraint System). Repair is complete. RETURN the vehicle to the customer.