Pinpoint Test J: DTCs B0050:11, B0050:12, B0050:13 and B0050:1D
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test - Restraints Control Module (RCM)
Pinpoint Test J: DTCs B0050:11, B0050:12, B0050:13 and B0050:1D
Refer to Wiring Diagram Set 46 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Supplemental Restraint System for schematic and connector information. Diagrams By Number
Normal Operation
The Restraints Control Module (RCM) monitors the driver safety belt buckle switch (Driver Seatbelt Sensor) circuits for the following faults:
- Open circuit
- Short to voltage
- Short to ground
- Current out of range
If a fault is detected, the RCM will store DTC B0050:11, B0050:12, B0050:13 or B0050:1D in memory and will send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.
B0050:1D-B0050:13:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver safety belt buckle assembly
- RCM
PINPOINT TEST J: DTCs B0050:11, B0050:12, B0050:13 AND B0050:1D
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 probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, 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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J1 RETRIEVE RCM DTCs
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Was DTC B0050:11, B0050:12, B0050:13 or B0050:1D 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 the self-test.
For DTC B0050:11 or B0050:1D, GO to J2.
For DTC B0050:12, GO to J4.
For DTC B0050:13, GO to J5.
No
This is an intermittent fault when present as a CMDTC only. GO to J10.
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J2 CHECK DRIVER SEATBELT SENSOR DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE 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.
- 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.
- Disconnect: Driver Safety Belt Buckle Switch C3065.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety belt buckle switch disconnected, an open circuit fault would normally be retrieved.
- Did the on-demand DTC change from B0050:11 or B0050:1D to B0050:13?
Yes
GO to J8.
No
For DTC B0050:11, GO to J3.
For DTC B0050:1D, GO to J9.
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J3 CHECK DRIVER SAFETY BELT BUCKLE SWITCH CIRCUIT 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 belt buckle switch C3065-1, circuit CR201 (BU/OG), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to J9.
No
REPAIR circuit CR201 (BU/OG). GO to J11.
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J4 CHECK DRIVER SAFETY BELT BUCKLE SWITCH CIRCUIT 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 Seat Side Air Bag Module C367.
- Disconnect: Driver Safety Belt Buckle Switch C3065.
- 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 belt buckle switch C3065-1, circuit CR201 (BU/OG), harness side and ground.
- Is any voltage present?
Yes
REPAIR circuit CR201 (BU/OG). GO to J11.
No
GO to J9.
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J5 CHECK DRIVER SEATBELT SENSOR 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.
- 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.
- Disconnect: Driver Safety Belt Buckle Switch C3065.
- Connect a fused jumper wire between driver safety belt buckle switch C3065-1, circuit CR201 (BU/OG), harness side and C3065-2, circuit GD183 (BK/WH), harness side.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- DIAGNOSTIC TIP: When viewing DTCs with the driver safety belt buckle switch circuits shorted together, a short to ground fault would normally be retrieved.
- Did the on-demand DTC change from B0050:13 to B0050:11?
Yes
GO to J8.
No
GO to J6.
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J6 CHECK DRIVER SAFETY BELT BUCKLE SWITCH CIRCUIT FOR A OPEN
- 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.
- Remove fused jumper wire from the driver safety belt buckle switch connector.
- Measure the resistance between RCM C2041b-34, circuit CR201 (BU/OG), harness side and driver safety belt buckle switch C3065-1, circuit CR201 (BU/OG), harness side.
- Is the resistance less than 0.5 ohm?
Yes
GO to J7.
No
REPAIR circuit CR201 (BU/OG). GO to J11.
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J7 CHECK DRIVER SAFETY BELT BUCKLE SWITCH GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between driver safety belt buckle switch C3065-2, circuit GD183 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to J9.
No
REPAIR circuit GD183 (BK/WH). GO to J11.
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J8 CONFIRM DRIVER SEATBELT SENSOR 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
- Connect: RCM C2041a and C2041b.
- Connect: Driver Safety Belt Buckle Switch C3065.
- 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.
- 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 belt buckle assembly. GO to J11.
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. GO to J10.
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J9 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
- Connect: Driver Safety Belt Buckle Switch C3065.
- 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.
- 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 J11.
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. GO to J10.
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J10 CHECK FOR AN INTERMITTENT 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 belt buckle switch C3065:
- 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.
- 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
- Connect: All Previously Disconnected Component(s)/Connector(s).
- 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 DTC B0050:11, B0050:12, B0050:13 or B0050:1D retrieved on-demand during self-test?
Yes
The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.
For DTC B0050:11 or B0050:1D, GO to J2.
For DTC B0050:12, GO to J4.
For DTC B0050:13, GO to J5.
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. REPAIR any intermittent wiring, terminal or connector concerns found.
GO to J11.
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J11 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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