Pinpoint Test G: DTCs B0021:11, B0021:12, B0021:13 and B0021:1A
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test - Restraints Control Module (RCM)
Pinpoint Test G: DTCs B0021:11, B0021:12, B0021:13 and B0021:1A
Normal Operation
The Restraints Control Module (RCM) continuously monitors the driver Safety Canopy(R) (Left Curtain Deployment Control 1) circuits for the following faults:
- Resistance out of range
- Unexpected voltage
- Short to ground
If a fault is detected, the RCM will store DTC B0021:11, B0021:12, B0021:13 or B0021:1A in memory and send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.
The RCM 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. If the value displayed is lower or higher than the desired range of 1.7-2.78 ohms, the RCM can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. The RCM fault trigger is adjusted as the vehicle ages so the exact threshold for a DTC will change over time. 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 will require the PID value to be between 1.7 ohms and 2.78 ohms 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 ensure that minor changes in resistance do not create a repeat concern. This test will use a process of elimination to diagnose each part of the deployment loop circuit including:
- Wiring
- Connections
- Driver Safety Canopy(R) module
- RCM
B0021:1A-B0021:13:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver Safety Canopy(R) module
- RCM
PINPOINT TEST G: DTCs B0021:11, B0021:12, B0021:13 AND B0021:1A
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.
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.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
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G1 RETRIEVE RCM DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Was DTC B0021:11, B0021:12, B0021:13 or B0021:1A 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 B0021:13 or B0021:1A, GO to G2.
For DTC B0021:11, GO to G8.
For DTC B0021:12, GO to G10.
No
This is an intermittent fault when present as a CMDTC only.
For DTC B0021:13 or B0021:1A, GO to G13.
For DTC B0021:11, GO to G14.
For DTC B0021:12, GO to G15.
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G2 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 RESISTANCE (DEPLOY_11_R) PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - RCM.
- Enter the following diagnostic mode on the scan tool: DEPLOY_11_R PID.
- Does the PID value read between 1.7 and 2.78 ohms?
Yes
GO to G12.
No
GO to G3.
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G3 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 RESISTANCE (DEPLOY_11_R) PID WHILE CARRYING OUT THE HARNESS TEST
NOTE: A resistance PID that reads between 1.47 and 1.69 ohms or between 2.79 and 3.31 ohms may or may not set a DTC, yet indicates a strong potential for a fault to occur. Make sure to thoroughly check the wire harness(es), connectors and terminals as they are the likely source of the fault condition.
- Continue monitoring the DEPLOY_11_R PID while carrying out the harness test of the driver Safety Canopy(R) circuits and accessible connectors (including any in-line connectors) by wiggling connectors and flexing the wire harness.
- Does the PID value read between 1.7 and 2.78 ohms while carrying out the harness test?
Yes
DEPOWER the SRS and REPAIR the connector, terminals or wire harness as needed.
Refer to Wiring Diagram Set 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
GO to G17.
No
If the DEPLOY_11_R PID is less than 1.7 ohms, GO to G4.
If the DEPLOY_11_R PID is greater than 2.78 ohms, GO to G6.
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G4 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 DTC FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED)
NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Canopy(R) C9006.
- Repower the SRS. Do not prove out the SRS 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.
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety canopy disconnected, an open circuit fault would normally be retrieved.
- Did the on-demand DTC change from B0021:1A to B0021:13?
Yes
GO to G11.
No
GO to G5.
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G5 CHECK FOR A SHORT BETWEEN DRIVER SAFETY CANOPY(R) CIRCUITS
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: RCM C2041a and C2041b.
- Measure the resistance between driver Safety Canopy(R) C9006-1, circuit CR109 (BN/BU), harness side and C9006-3, circuit RR109 (BU/GN), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to G12.
No
REPAIR circuits CR109 (BN/BU) and RR109 (BU/GN). GO to G17.
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G6 CHECK DRIVER SAFETY CANOPY(R) CIRCUITS FOR AN OPEN
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Canopy(R) C9006.
- Disconnect: RCM C2041a and C2041b.
- Measure the resistance between RCM C2041b, harness side and driver Safety Canopy(R) C9006, harness side using the following chart.
- Are the resistances less than 0.5 ohm?
Yes
GO to G7.
No
REPAIR circuit CR109 (BN/BU) or RR109 (BU/GN). GO to G17.
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G7 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED)
NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
- Connect: RCM C2041a and C2041b.
- Connect a fused jumper wire between driver Safety Canopy(R) C9006-1, circuit CR109 (BN/BU), harness side and C9006-3, circuit RR109 (BU/GN), harness side.
- Repower the SRS. Do not prove out the SRS 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.
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety canopy circuits shorted together, a low resistance fault would normally be retrieved.
- Did the on-demand DTC change from B0021:13 to B0021:1A?
Yes
GO to G11.
No
GO to G12.
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G8 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 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 by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Canopy(R) C9006.
- Repower the SRS. Do not prove out the SRS 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.
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety canopy disconnected, an open circuit fault would normally be retrieved.
- Did the on-demand DTC change from B0021:11 to B0021:13?
Yes
GO to G11.
No
GO to G9.
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G9 CHECK DRIVER SAFETY CANOPY(R) CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: RCM C2041a and C2041b.
- Measure the resistance between driver Safety Canopy(R):
- C9006-1, circuit CR109 (BN/BU), harness side and ground.
- C9006-3, circuit RR109 (BU/GN), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to G12.
No
REPAIR circuit CR109 (BN/BU) or RR109 (BU/GN). GO to G17.
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G10 CHECK DRIVER SAFETY CANOPY(R) CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Safety Canopy(R) C9006.
- Disconnect: RCM C2041a and C2041b.
- Repower the SRS. Do not prove out the SRS 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 Safety Canopy(R):
- C9006-1, circuit CR109 (BN/BU), harness side and ground.
- C9006-3, circuit RR109 (BU/GN), harness side and ground.
- Is voltage present on either circuit?
Yes
REPAIR circuit CR109 (BN/BU) or RR109 (BU/GN). GO to G17.
No
GO to G12.
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G11 CONFIRM THE DRIVER SAFETY CANOPY(R) MODULE FAULT
NOTE: Make sure all restraint system components, sensor electrical connectors and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Remove the fused jumper wire from the Safety Canopy(R) electrical connector, if installed previously.
- Connect: Driver Safety Canopy(R) C9006.
- Connect: RCM C2041a and C2041b.
- Repower the SRS. Do not prove out the SRS 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.
- Was the original DTC retrieved on-demand during self-test?
Yes
INSTALL a new driver safety canopy. REFER to Safety Canopy Module Safety Canopy Module. GO to G17.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.
For DTC B0021:13 or B0021:1A, GO to G13.
For DTC B0021:11, GO to G14.
For DTC B0021:12, GO to G15.
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G12 CONFIRM THE RCM FAULT
NOTE: Make sure all restraint system components, sensor electrical connectors and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Prior to reconnecting any previously disconnected SRS 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 C2041a and C2041b 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 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
- Remove the fused jumper wire from the Safety Canopy(R) electrical connector, if installed previously.
- Connect: Driver Safety Canopy(R) C9006.
- Connect: RCM C2041a and C2041b (if previously disconnected).
- Repower the SRS. Do not prove out the SRS 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.
- Was the original DTC retrieved on-demand during self-test?
Yes
INSTALL a new RCM. REFER to Restraints Control Module (RCM) Service and Repair. GO to G17.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.
For DTC B0021:13 or B0021:1A, GO to G13.
For DTC B0021:11, GO to G14.
For DTC B0021:12, GO to G15.
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G13 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 RESISTANCE (DEPLOY_11_R) PID FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT
- Monitor the DEPLOY_11_R PID on the scan tool.
- NOTE: A resistance PID that reads between 1.47 and 1.69 ohms or between 2.79 and 3.31 ohms may or may not set a DTC, yet indicates a strong potential for a fault to occur. Make sure to thoroughly check wire harness(es) connectors and terminals as they are the likely source of the fault condition.
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness.
- Does the PID value read less than 1.7 ohms or greater than 2.78 ohms?
Yes
DEPOWER the SRS and REPAIR as necessary.
Refer to Wiring Diagram Set 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
GO to G17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to G16.
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G14 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 FOR AN INTERMITTENT SHORT TO GROUND FAULT
- Ignition ON.
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Was DTC B0021:11 retrieved on-demand during self-test?
Yes
DEPOWER the SRS and REPAIR as necessary.
Refer to Wiring Diagram Set 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
GO to G17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to G16.
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G15 CHECK LEFT CURTAIN DEPLOYMENT CONTROL 1 FOR AN INTERMITTENT SHORT TO BATTERY FAULT
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect the driver Safety Canopy(R) module C9006.
- Repower the SRS. Do not prove out the SRS 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.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Was DTC B0021:12 retrieved on-demand during self-test?
Yes
DEPOWER the SRS and REPAIR as necessary.
Refer to Wiring Diagram Set 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
GO to G17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to G16.
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G16 CHECK HARNESS AND CONNECTORS
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect the driver Safety Canopy(R) module C9006:
- 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.
- Were any concerns found?
Yes
REPAIR as necessary.
Refer to Wiring Diagram Set 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Diagrams By Number
GO to G17.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to G17.
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G17 CHECK FOR ADDITIONAL SRS 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 components (if previously disconnected).
- If previously directed to depower the SRS, repower the SRS. Do notprove out the SRS 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 - Restraints.
- NOTE: When selecting Restraints from the Self Test menu, DTCs will be retrieved from the RCM and OCSM.
- Are any RCM and/or OCSM DTCs retrieved?
Yes
Do not clear any DTCs until all DTCs have been resolved. GO to the DTC Charts for pinpoint test direction. [1][2]Diagnostic Trouble Code Descriptions
No
CLEAR all RCM and OCSM CMDTCs. PROVE OUT the SRS. Repair is complete. RETURN the vehicle to the customer.
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