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U1-U10




Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)

Pinpoint Test U: DTCs B1211:11, B1211:12, B1211:13 and B1211:1A


Normal Operation

The Restraints Control Module (RCM) continuously monitors driver safety belt retractor pretensioner 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) sets and stores DTC B1211:11, B1211:12, B1211:13 or B1211:1A 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 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 U : DTCs B1211:11, B1211:12, B1211:13 AND B1211:1A

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 disassemble or tamper with seat belt deployable components, including pretensioners, load limiters and inflators. Never back probe deployable device electrical connectors. Tampering or back probing may cause an accidental deployment and result in 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:
Only disconnect or reconnect Supplemental Restraint System (SRS) 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 parts catalog 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.

U1 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 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 the self-test.

For regular cab and Crew Cab vehicles with DTC B1211:13 or B1211:1A, GO to U2.

For SuperCab vehicles with DTC B1211:13 or B1211:1A, GO to U3.

For DTC B1211:11, GO to U9.

For DTC B1211:12, GO to U11.
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 U14.

For DTC B1211:11, GO to U15.

For DTC B1211:12, GO to U16.

U2 CHECK THE DRIVER SEATBELT 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 the safety belt retractor pretensioner and inspect for the following:
- the Connector Position Assurance (CPA) tabs are not broken or the clip is not damaged.
- the CPA (Connector Position Assurance) tab is fully and correctly seated.







Is the CPA (Connector Position Assurance) clip installed correctly, not damaged or broken and fully seated?

Yes
GO to U3.
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. GO to U18.

U3 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).
- Monitor and record PID DEPLOY_23_R.


Does the PID value read between 1.7 and 2.78 ohms?

Yes
GO to U13.
No
GO to U4.

U4 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER DEPLOYMENT CONTROL RESISTANCE (DEPLOY_23_R) PID WHILE CARRYING OUT A HARNESS TEST

- While monitoring the DEPLOY_23_R PID, carry out a 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.

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.

GO to U18.
No
For PID value less than 1.7 ohms, GO to U5.

For PID value greater than 2.78 ohms, GO to U7.

U5 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER 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 Safety Belt Retractor Pretensioner C3201 (regular cab and Crew Cab) or C727 (SuperCab).

- 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 is normally retrieved.

Did the on-demand DTC change from B1211:1A to a B1211:13?

Yes
GO to U12.
No
GO to U6.

U6 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) C310A and C310B.

- For regular cab and Crew Cab, measure the resistance between the driver safety belt retractor pretensioner C3201-1, circuit CR146 (GY/VT), harness side and C3201-2, circuit RR146 (BU/BN), harness side.






- For SuperCab, measure the resistance between the driver safety belt retractor pretensioner C727-1, circuit CR146 (GY/VT), harness side and C727-2, circuit RR146 (BU/BN), harness side.






Is the resistance greater than 10,000 ohms?

Yes
GO to U13.
No
REPAIR circuits CR146 (GY/VT) and RR146 (BU/BN).

GO to U18.

U7 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: Driver Safety Belt Retractor Pretensioner C3201 (regular cab and Crew Cab) or C727 (SuperCab).

- Disconnect: RCM (Restraints Control Module) C310A and C310B.

- For regular cab and Crew Cab, measure the resistance between RCM (Restraints Control Module), harness side and driver safety belt retractor pretensioner C3201, harness side using the following chart.

RCM (Restraints Control Module) Circuit Driver Safety Belt Retractor Pretensioner C310B-2 CR146 (GY/VT) C3201-1 C310B-1 RR146 (BU/BN) C3201-2








- For SuperCab, measure the resistance between RCM (Restraints Control Module), harness side and driver safety belt retractor pretensioner C727, harness side using the following chart.

RCM (Restraints Control Module) Circuit Driver Safety Belt Retractor Pretensioner C310B-2 CR146 (GY/VT) C727-1 C310B-1 RR146 (BU/BN) C727-2








Are the resistances less than 0.5 ohm?

Yes
GO to U8.
No
REPAIR circuit CR146 (GY/VT) or RR146 (BU/BN).

GO to U18.

U8 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER 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.

- For regular cab and Crew Cab, connect a fused jumper wire between the driver safety belt retractor pretensioner C3201-1, circuit CR146 (GY/VT), harness side and C3201-2, circuit RR146 (BU/BN), harness side.






- For SuperCab, connect a fused jumper wire between the driver safety belt retractor pretensioner C727-1, circuit CR146 (GY/VT), harness side and C727-2, circuit RR146 (BU/BN), 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 is normally retrieved.

Did the on-demand DTC change from B1211:13 to B1211:1A?

Yes
REMOVE the fused jumper wire and GO to U12.
No
REMOVE the fused jumper wire and GO to U13.

U9 CHECK THE DRIVER SEATBELT RETRACTOR PRETENSIONER 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 Safety Belt Retractor Pretensioner C3201 (regular cab and Crew Cab) or C727 (SuperCab).

- 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 is normally retrieved.

Did the on-demand DTC change from B1211:11 to B1211:13?

Yes
GO to U12.
No
GO to U10.

U10 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) C310A and C310B.

- For regular cab and Crew Cab, measure the resistance between the driver safety belt retractor pretensioner:
- C3201-1, circuit CR146 (GY/VT), harness side and ground.

- C3201-2, circuit RR146 (BU/BN), harness side and ground.







- For SuperCab, measure the resistance between the driver safety belt retractor pretensioner:
- C727-1, circuit CR146 (GY/VT), harness side and ground.

- C727-2, circuit RR146 (BU/BN), harness side and ground.







Are the resistances greater than 10,000 ohms?

Yes
GO to U13.
No
REPAIR circuit CR146 (GY/VT) or RR146 (BU/BN).

GO to U18.
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