Pinpoint Test - DTC: J. Diagnosis and Testing

B0070:11, B0070:12, B0070:13 and B0070:1A

For circuit and connector information, refer to Wiring Diagrams Cell 46.

Normal Operation and Fault Symptoms

The RCM continuously monitors the driver seatbelt pretensioner anchor circuits for the following faults:

• Resistance Out of Range
• Unexpected Voltage
• Short to Ground
• Driver Seatbelt Pretensioner Fault

When a fault is detected, the RCM stores DTCs B0070:11, B0070:12, B0070:13 or B0070:1A and sends a message to the IPC to illuminate the airbag warning indicator.

The RCM analyzes the deployment loop resistance to determine if a malfunction is present. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the displayed value is below or above the required range (refer to the chart below), the RCM may set a DTC. As the deployment loop resistance moves further outside the desired range, the likelihood of a DTC increases. Small fluctuations in resistance may occur due to the effect of road vibrations on the terminal fitting. Crimps and terminals may be affected by stress and movement of the seat belt and may cause an increase in resistance due to wire tension. These variables may 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 of whether the module reports the DTC on demand at the time of diagnosis. Following this direction helps ensure that minor resistance changes do not cause repeat concerns. This test uses a process of elimination to diagnose each part of the deployment circuit, including:

• Wiring
• Connections
• Driver Seat Belt Pretensioner
• RCM

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Driver Seat Belt Pretensioner
• RCM

WARNING: Do not touch, move or alter the original horizontal mounting position of the Restraints Control Module (RCM) while the RCM is connected and the ignition is ON. Failure to follow this instruction may result in accidental deployment of the airbag and cause serious injury or death.

NOTE: Most concerns are related to connector and/or wiring issues. Perform a thorough inspection and check before proceeding to the Pinpoint Test.

NOTE: Only disconnect or reconnect SRS components when instructed to do so in the Pinpoint Test step. Failure to follow this instruction may result in an incorrect SRS diagnosis.

NOTE: Always verify that the correct SRS 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 parts catalog to confirm the correct component is being installed. If an incorrect SRS component is installed, diagnostic trouble codes (DTCs) may be set.

NOTE: Before returning the vehicle to the customer, the SRS must be fully functional and operating correctly.

A1 REMOVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

WARNING: Before starting any service procedure in this section, refer to the Safety Warnings in Section 100-00 General Information. Failure to follow this instruction may result in serious personal injury. REFER TO: Pyrotechnic Device Handling Precautions (100-00 General Information, Description and Operation). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. Was DTC B0070:11, B0070:12, B0070:13 or B0070:1A retrieved on demand during the self-test? Yes This fault cannot be cleared until it is repaired and the DTC is no longer retrieved on demand during the self-test. For DTC B0070:13 or B0070:1A GO to A2 For DTC B0070:11 GO to A8 For DTC B0070:12 GO to A10. No This is an intermittent fault if it is present only as a CMDTC. If DTC B0070:13 or B0070:1A, GO to A13. For DTC B0070:11 GO to A14. For DTC B0070:12 GO to A15.

A2 CHECK THE DRIVER SEAT BELT PRETENSIONER ANCHOR CONTROL (DEPLOY_29_RES) PID (PARAMETER IDENTIFICATION)

Using the diagnostic scan tool, view the RCM parameter identification (PID) data. Monitor and record the resistance value displayed by the DEPLOY_29_RES PID. Is the PID value between 1.7 and 2.78 ohms? Yes GO to A12 No GO to A3

A3 CHECK THE DRIVER SEAT BELT PRETENSIONER ANCHOR CONTROL (DEPLOY_29_RES) PID (PARAMETER IDENTIFICATION) WHILE PERFORMING A HARNESS CHECK

While monitoring the DEPLOY_29_RES PID, perform a check of the driver seat belt pretensioner anchor circuit harness and accessible connectors (including any inline connectors). Frequently move and flex the harness and connectors. Record the resistance value indicated by the PID. Is the PID value within the range of 1.7 to 2.78 ohms during the harness check? Yes DISCONNECT the SRS from power and REPAIR the connector, terminals or harness as necessary. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17 No If the PID value is less than 1.7 ohms, GO to A4. If the PID value is greater than 2.78 ohms, GO to A6.

A4 CHECK THE DRIVER SEAT BELT PRETENSIONER ANCHOR CONTROL DTC (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT STATUS (LOW RESISTANCE INDICATED)

Ignition OFF. De-power the SRS. Refer to: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C3065. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. DIAGNOSTIC TIP: When viewing the Driver Seatbelt Anchor Pretensioner Diagnostic Trouble Codes (DTCs) with the pretensioner disconnected, an open circuit fault typically recovers. Did the on-demand DTC change from B0070:1A to B0070:13? Yes GO to A11 No GO to A5

A5 CHECK FOR A SHORT BETWEEN THE DRIVER SEAT BELT PRETENSIONER ANCHOR CIRCUITS

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect RCM C310A and C310B. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C3065-1 C3065-2 Is the resistance greater than 10000 Ohms? Yes GO to A12 No REPAIR the circuit(s). For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17

A6 CHECK THE DRIVER SEAT BELT PRETENSIONER CIRCUITS FOR AN OPEN

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C3065. Disconnect RCM C310A and C310B. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C310B-51 C3065-2 C310B-52 C3065-1 Is the resistance less than 0.5 Ohms? Yes GO to A7 No REPAIR the circuits. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17

A7 CHECK THE DRIVER SEAT BELT PRETENSIONER ANCHOR CONTROL DTC (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT STATUS (OPEN INDICATED)

Connect RCM C310A and C310B. Connect a fused jumper wire: Click to display connectors Lead 1 Measurement/Action Lead 2 C3065-1 C3065-2 Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. DIAGNOSTIC TIP: When viewing the Driver Seatbelt Anchor Pretensioner Diagnostic Trouble Codes (DTCs), a short circuit fault typically recovers as a low resistance fault. Did the on-demand DTC change from B0070:13 to B0070:1A? Yes REMOVE the fusible link and GO to A11. No REMOVE the fusible link and GO to A12.

A8 CHECK THE DRIVER SEAT BELT PRETENSIONER DTC (DIAGNOSTIC TROUBLE CODE) TO CHANGE THE FAULT STATUS (SHORT TO GROUND INDICATED)

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C3065. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. DIAGNOSTIC TIP: When viewing the Driver Seatbelt Anchor Pretensioner Diagnostic Trouble Codes (DTCs) with the pretensioner disconnected, an open circuit fault typically recovers. Did the on-demand DTC change from B0070:11 to B0070:13? Yes GO to A11 No GO to A9

A9 CHECK THE DRIVER SEAT BELT PRETENSIONER CIRCUITS FOR A SHORT TO GROUND

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect RCM C310A and C310B. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C3065-1 Ground C3065-2 Ground Is the resistance greater than 10000 ohms? Yes GO to A12 No REPAIR the circuit(s). For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17

A10 CHECK THE DRIVER SEAT BELT PRETENSIONER CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C3065. Disconnect RCM C310A and C310B. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C3065-1 Ground C3065-2 Ground Is there voltage present? Yes REPAIR the circuit(s). For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17 No GO to A12

A11 CONFIRM THE DRIVER SEAT BELT BUCKLE PRETENSIONER FAULT

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Before reconnecting any previously disconnected SRS component: inspect the connector(s) (including any integral connectors) for pushed-out, loose or spread terminals, and loose or chafed wire connections at the terminals. inspect the wiring harness for damage, pinching, or cut or pierced wires. check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation. repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information. Connect the driver seat belt anchor pretensioner C3065. Connect RCM C310A and C310B. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. Was the original DTC retrieved on demand during the self-test? Yes INSTALL a new driver seat belt pretensioner (including the anchor pretensioner). REFER TO: Seat Belt Pretensioner and Anchor Pretensioner (501-20A Seat Belt Systems, Removal and Installation). GO to A17 No During diagnosis the condition became intermittent. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. If DTC B0070:13 or B0070:1A, GO to A13. For DTC B0070:11, GO to A14. For DTC B0070:12, GO to A15.

A12 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Before reconnecting any previously disconnected SRS component: inspect the connector(s) (including any integral connectors) for pushed-out, loose or spread terminals, and loose or chafed wire connections at the terminals. inspect the wiring harness for damage, pinching, or cut or pierced wires. check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation. repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information. Connect the driver seat belt anchor pretensioner C3065. Connect RCM C310A and C310B. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Using the diagnostic scanner, perform the RCM self-test. Was the original DTC retrieved on demand during the self-test? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this condition, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this condition, INSTALL a new RCM. Refer to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). GO to A17. No During diagnosis the condition became intermittent. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. If DTC B0070:13 or B0070:1A, GO to A13. For DTC B0070:11, GO to A14. For DTC B0070:12, GO to A15.

A13 CHECK THE DRIVER SEAT BELT PRETENSIONER CONTROL (DEPLOY_29_RES) PID (PARAMETER IDENTIFICATION) FOR AN INTERMITTENT HIGH RESISTANCE OR OPEN CIRCUIT FAULT

Using the diagnostic scan tool, view the RCM parameter identification (PID) data. While monitoring the DEPLOY_29_RES PID, attempt to recreate the fault by wiggling the connectors (including any inline connectors) and flexing the harness repeatedly. Record the resistance value shown by the PID. Is the PID value 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 components at this time. Install SRS components only if directed by the pinpoint test. GO to A16. No DISCONNECT the SRS and REPAIR as necessary. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17

A14 CHECK THE DRIVER SEAT BELT PRETENSIONER CONTROL CIRCUITS FOR AN INTERMITTENT SHORT TO GROUND

Attempt to reproduce the fault by wiggling the connectors (including any inline connectors) and flexing the wiring harness frequently. Using the diagnostic scanner, perform the RCM self-test. Was DTC B0070:11 retrieved on demand during the self-test? Yes DISCONNECT the SRS and REPAIR as necessary. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17 No The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. GO to A16.

A15 CHECK THE DRIVER SEAT BELT PRETENSIONER CONTROL CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C3065. Re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). The ignition is on. Attempt to reproduce the fault by wiggling the connectors (including any inline connectors) and flexing the wiring harness frequently. Using the diagnostic scanner, perform the RCM self-test. Was DTC B0070:12 retrieved on demand during the self-test? Yes DISCONNECT the SRS and REPAIR as necessary. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17 No The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. GO to A16.

A16 CHECK THE HARNESS AND CONNECTORS

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the driver seat belt anchor pretensioner C323. Inspect the connector(s) (including any inline connectors) for corrosion, loose or spread terminals, and loose or worn wire-to-terminal connections. Inspect the wiring harness for damage, pinching, cut or pierced wires. Inspect the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation. Were any concerns found? Yes REPAIR as necessary. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A17 No The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only if directed to do so by a pinpoint test. GO to A17.

A17 CHECK THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF. Reconnect all SRS components (if previously disconnected). If SRS power was previously disabled, re-enable SRS. REFER TO: Disabling and Enabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures). Do not confirm SRS at this time. The ignition is on. NOTE: When Restraints is selected in the Self Test menu, DTCs are retrieved from the RCM, OCSM and, if equipped, BECMB. Using the diagnostic scan tool, perform the Restraints Self-Test. Are any RCM, OCSM and/or BECMB diagnostic trouble codes (DTCs) retrieved on demand during the self-test? Yes Do not clear any diagnostic trouble codes (DTCs) until all diagnostic trouble codes (DTCs) have been resolved. No Repair is complete. RETURN the vehicle to the customer.