Pinpoint Test - DTC: I. Diagnosis and Testing

B0052:11, B0052:12, B0052:13 and B0052:1D

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

Normal Operation and Fault Symptoms

The RCM monitors the passenger seat belt buckle switch circuits for the following faults:

• Open circuit
• Short to voltage
• Short to Ground
• Current out of range
• Faulty passenger seatbelt buckle switch

When a fault is detected, the RCM stores DTC B0052:11, B0052:12, B0052:13 or B0052:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

DTC Fault Trigger Conditions

Visual Inspection and Preliminary Diagnosis

Possible Sources

• Wiring, Terminals or Connectors
• Passenger Seat Belt Latch
• RCM

• Inspect the passenger seat belt buckle for damage.
• Inspect the wiring harness for damage.
• Inspect the connectors for loose or damaged terminals.

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 B0052:11, B0052:12, B0052:13 or B0052:1D 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 B0052:11 or B0052:1D, GO to A2. For DTC B0052:12, GO to A4. For DTC B0052:13, GO to A5. No This is an intermittent fault if it is present only as a CMDTC. GO to A11.

A2 CHECK THE PASSENGER SEAT BELT SENSOR DTC FOR A CHANGE IN FAULT STATUS (SHORT TO GROUND OR CURRENT OUT OF RANGE)

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the passenger seatbelt buckle C3738. 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 Diagnostic Trouble Codes (DTCs) with the passenger seat belt buckle disconnected, an open circuit is usually indicated. This is because the passenger seat belt buckle switch shares a connector with the Belt Tension Sensor (BTS). A BTS circuit fault will also be present in the OCSM. Did the on-demand fault code change from B0052:11 or B0052:1D to B0052:13? Yes GO to A9 No For DTC B0052:11 GO to A3 For DTC B0052:1D GO to A10

A3 CHECK THE PASSENGER SEAT BELT BUCKLE SWITCH CIRCUIT 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 C3738-5 Ground Is the resistance greater than 10000 Ohms? Yes GO to A10 No REPAIR the circuit. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A12

A4 CHECK THE PASSENGER SEAT BELT BUCKLE SWITCH CIRCUIT 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 RCM C310A and C310B. Disconnect the passenger seat side airbag (integrated) C3206. Disconnect the passenger seatbelt buckle C3738. 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 C3738-5 Ground Is there voltage present? Yes REPAIR the circuit. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A12 No GO to A10

A5 CHECK THE PASSENGER SEAT BELT SENSOR DTC FOR A CHANGE IN FAULT STATUS (INDICATES 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 passenger side airbag (integrated) C3206. Disconnect the passenger seatbelt buckle C3738. Connect a fused jumper wire: Click to display connectors Lead 1 Measurement/Action Lead 2 C3738-5 C3738-6 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 Diagnostic Trouble Codes (DTCs) with the passenger seat belt buckle switch circuits shorted together, a short to ground is usually indicated. This is because the passenger seat belt buckle switch shares a connector with the Belt Tension Sensor (BTS). A BTS circuit fault will also be present in the OCSM. Did the on-demand fault code change from B0052:13 to B0052:11? Yes REMOVE the fusible link and GO to A9. No REMOVE the fuse jumper and GO to A6.

A6 CHECK THE PASSENGER SEAT BELT BUCKLE SWITCH CIRCUIT 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 RCM C310A and C310B. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C310B-55 C3738-5 Is the resistance less than 0.5 Ohms? Yes For 2013 model year vehicles GO to A7 For 2014 model year and later vehicles GO to A8. No REPAIR the circuit. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A12

A7 CHECK THE PASSENGER SEAT BELT BUCKLE SWITCH GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C3738-6 C310B-53 Is the resistance less than 3 ohms? Yes GO to A10 No REPAIR the circuit. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A12

A8 CHECK THE PASSENGER SEAT BELT BUCKLE SWITCH GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C3738-6 Ground Is the resistance less than 3 ohms? Yes GO to A10 No REPAIR the circuit. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A12

A9 CONFIRM THE PASSENGER SEAT BELT BUCKLE SWITCH 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. Inspect the RCM C310A and C310B connector position assurance (CPA) lock for proper operation. REFER TO: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information. Connect the RCM C310A and C310B (if previously disconnected). Connect the passenger side airbag (integrated) C3206. Connect the passenger seatbelt buckle C3738. 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 passenger seat belt buckle. REFER to: Front Seat Belt Buckle (501-20A Seat Belt Systems, Removal and Installation). GO to A12 No During diagnosis, the fault condition became intermittent. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. GO to A11

A10 CONFIRM 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 RCM C310A and C310B (if previously disconnected). Connect the passenger seatbelt buckle C3738. Connect the passenger side airbag (integrated) C3206. 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 in OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). GO to A12 No During diagnosis, the fault condition became intermittent. Do not install any new SRS components at this time. Install SRS components only if directed by the pinpoint test. GO to A11

A11 CHECK FOR INTERMITTENT FAULT

Ignition OFF. De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disabling and Enabling (501-20B Supplemental Restraint System, General Procedures). Disconnect the passenger seatbelt buckle C3738. 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. Rectify any concerns found. Refer to Wiring Diagrams Cell 05 for schematic and connector information. Inspect the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation. Reconnect all previously disconnected components/connectors. 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 a diagnostic scan tool, perform the RCM self-test to retrieve diagnostic trouble codes (DTCs). Was DTC B0052:11, B0052:12, B0052:13 or B0052:1D 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 B0052:11 or B0052:1D, GO to A2. For DTC B0052:12, GO to A4. For DTC B0052:13, GO to A5. 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 A12

A12 CHECK THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF. Reconnect all SRS components (if previously disconnected). If previously directed to disable the SRS, 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. 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 DTCs have been resolved. REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). No Repair is complete. RETURN the vehicle to the customer.