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Home >> Ford >> 2012 >> Explorer Limited, 3.5 8, AWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Routine A - M >> Diagnostic Routine F >> Pinpoint Test

Pinpoint Test

WARNING: Do not handle, move or change the original horizontal mounting position of the 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® and cause serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy® 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.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect 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.
NOTE: Always make sure 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 Catalog Advantage or equivalent to make sure the correct component is being installed. If an incorrect SRS component is installed, DTCs  may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. RETRIEVE RCM DTCs 
    1. Ignition ON.
    2. Using a scan tool, perform RCM self-test to retrieve DTCs  .

    Was DTC B0021:11, B0021:12, B0021:13 or B0021:1A retrieved on-demand during self-test? 

    1. 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 2  .
      • For DTC B0021:11, GO to  8.
      • For DTC B0021:12, GO to  9.
    2. No
      • This is an intermittent fault when present as a CMDTC  only.
      • For DTC B0021:13 or B0021:1A, GO to  13.
      • For DTC B0021:11, GO to  14.
      • For DTC B0021:12, GO to  15.
  2. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 RESISTANCE (DEPLOY_11_R) PID
    1. Using a scan tool, view RCM PIDs  .
    2. Monitor and record the resistance value displayed by the DEPLOY_11_R PID.

    Does the PID value read between 1.7 and 2.78 ohms? 

    1. Yes:
      • GO to  12.
    2. No
      • GO to 3  .
  3. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 RESISTANCE (DEPLOY_11_R) PID WHILE CARRYING OUT THE HARNESS TEST
    1. While monitoring the DEPLOY_11_R PID, carry out the harness test of the LH Safety Canopy® module circuits and accessible connectors (including any inline connectors) by wiggling and flexing the wire harness and connectors frequently. Record the resistance value indicated by the PID.

    Does the PID value read between 1.7 and 2.78 ohms while carrying out the harness test? 

    1. Yes:
    2. No
      • For PID value less than 1.7 ohms, GO to 4  .
      • For PID value greater than 2.78 ohms, GO to  6.
  4. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 DTC FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED)
    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
    4. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    5. Ignition ON.
    6. Using a scan tool, perform RCM self-test to retrieve DTCs  .
    7. DIAGNOSTIC TIP:  When viewing DTCs  with the LH Safety Canopy® module disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B0021:1A to B0021:13? 

    1. Yes:
      • GO to  11.
    2. No
      • GO to 5  .
  5. CHECK FOR A SHORT BETWEEN LH Safety Canopy® CIRCUITS
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect RCM C310A and C310B.
    4. Measure:
      LH Safety Canopy® Module LH Safety Canopy® Module
      G08041240
      G08041241
      C3321 C3321
      Pin Circuit Measurement Pin Circuit
      1 CR109 (BN/BU)
      G08041242
      		 2 RR109 (BU/GN)

    Is the resistance greater than 10, 000 ohms? 

    1. Yes:
      • GO to  12.
    2. No
  6. CHECK THE LH Safety Canopy® MODULE CIRCUITS FOR AN OPEN
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
    4. Disconnect RCM C310A and C310B.
    5. Measure:
      RCM LH Safety Canopy® Module
      G08041243
      G08041244
      C310B C3321
      Pin Circuit Measurement Pin Circuit
      7 CR109 (BN/BU)
      G08041245
      		 1 CR109 (BN/BU)
      8 RR109 (BU/GN)
      G08041246
      		 2 RR109 (BU/GN)

    Are the resistances less than 0.5 ohm? 

    1. Yes:
      • GO to 7  .
    2. No
  7. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED)
    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    1. Connect RCM C310A and C310B.
    2. Connect a fused jumper wire:
      LH Safety Canopy® Module LH Safety Canopy® Module
      G08041247
      G08041248
      C3321 C3321
      Pin Circuit Measurement Pin Circuit
      1 CR109 (BN/BU)
      G08041249
      		 2 RR109 (BU/GN)
    3. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    4. Ignition ON.
    5. Using a scan tool, perform RCM self-test to retrieve DTCs  .
    6. DIAGNOSTIC TIP:  When viewing DTCs  with the LH Safety Canopy® module circuits shorted together, a low resistance fault is normally retrieved.

    Did the on-demand DTC change from B0021:13 to B0021:1A? 

    1. Yes:
      • REMOVE the fused jumper wire and GO to  11.
    2. No
      • REMOVE the fused jumper wire and GO to  12.
  8. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)
    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
    4. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    5. Ignition ON.
    6. Using a scan tool, perform RCM self-test to retrieve DTCs  .
    7. DIAGNOSTIC TIP:  When viewing DTCs  with the LH Safety Canopy® module disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B0021:11 to B0021:13? 

    1. Yes:
      • GO to  11.
    2. No
      • GO to 9  .
  9. CHECK THE LH Safety Canopy® CIRCUITS FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect RCM C310A and C310B.
    4. Measure:
      LH Safety Canopy® Module Ground
      G08041250
      G08041251
      C3321 Ground
      Pin Circuit Measurement Pin Circuit
      1 CR109 (BN/BU)
      G08041252
      		 - Ground
      2 RR109 (BU/GN)
      G08041253
      		 - Ground

    Are the resistances greater than 10, 000 ohms? 

    1. Yes:
      • GO to  12.
    2. No
  10. CHECK THE LH Safety Canopy® MODULE CIRCUITS FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
    4. Disconnect RCM C310A and C310B.
    5. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    6. Ignition ON.
    7. Measure:
      LH Safety Canopy® Module Ground
      G08041254
      G08041255
      C3321 Ground
      Pin Circuit Measurement Pin Circuit
      1 CR109 (BN/BU)
      G08041256
      		 - Ground
      2 RR109 (BU/GN)
      G08041257
      		 - Ground

    Is any voltage present? 

    1. Yes:
    2. No
      • GO to  12.
  11. CONFIRM THE LH Safety Canopy® MODULE FAULT
    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs  will be recorded.
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Prior to reconnecting any previously disconnected SRS component:
      • inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damaged, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B CPA lever/lock for correct operation. REFER to Restraints Control Module (RCM) .
      • repair any concerns found.

        Refer to OEM CONNECTOR REPAIR PROCEDURES for connector information.

    4. Connect LH Safety Canopy® Module C3321.
    5. Connect RCM C310A and C310B.
    6. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    7. Ignition ON.
    8. Using a scan tool, perform RCM self-test to retrieve DTCs  .

    Was the original DTC retrieved on-demand during self-test? 

    1. Yes:
    2. No
      • In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test  .
      • For DTC B0021:13 or B0021:1A, GO to  13.
      • For DTC B0021:11, GO to  14.
      • For DTC B0021:12, GO to  15.
  12. CONFIRM THE RCM FAULT
    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs  will be recorded.
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Prior to reconnecting any previously disconnected SRS component:
      • inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damaged, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B CPA lever/lock for correct operation. REFER to Restraints Control Module (RCM) .
      • repair any concerns found.

        Refer to OEM CONNECTOR REPAIR PROCEDURES for connector information.

    4. Connect LH Safety Canopy® Module C3321 (if previously disconnected).
    5. Connect RCM C310A and C310B.
    6. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    7. Ignition ON.
    8. Using a scan tool, perform RCM self-test to retrieve DTCs  .

    Was the original DTC retrieved on-demand during self-test? 

    1. Yes:
      • CHECK OASIS for any applicable TSBs  . If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs  address this concern, INSTALL a new RCM. REFER to Restraints Control Module (RCM) . GO to  17.
    2. No
      • In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test  .
      • For DTC B0021:13 or B0021:1A, GO to 13  .
      • For DTC B0021:11, GO to  14.
      • For DTC B0021:12, GO to  15.
  13. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 DEPLOYMENT CONTROL RESISTANCE (DEPLOY_11_R) PID FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT
    1. Using a scan tool, view RCM PIDs  .
    2. While monitoring the DEPLOY_11_R PID, attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently. Record the resistance value indicated by the PID.

    Does the PID value read between 1.7 and 2.78 ohms? 

    1. 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 when directed to do so in the pinpoint test  . GO to  16.
    2. No
  14. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 CIRCUITS FOR AN INTERMITTENT SHORT TO GROUND FAULT
    1. Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    2. Using a scan tool, perform RCM self-test to retrieve DTCs  .

    Was DTC B0021:11 retrieved on-demand during self-test? 

    1. Yes:
    2. 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 when directed to do so in the pinpoint test  . GO to  16.
  15. CHECK THE LEFT CURTAIN DEPLOYMENT CONTROL 1 CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY FAULT
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
    4. Repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    5. Ignition ON.
    6. Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    7. Using a scan tool, perform RCM self-test to retrieve DTCs  .

    Was DTC B0021:12 retrieved on-demand during self-test? 

    1. Yes:
    2. 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 when directed to do so in the pinpoint test  . GO to 16  .
  16. CHECK THE HARNESS AND CONNECTORS
    1. Ignition OFF.
    2. Depower the SRS. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    3. Disconnect LH Safety Canopy® Module C3321.
      • Remove the LH D-pillar trim panel. REFER to D-PILLAR TRIM PANEL .
      • Inspect connector(s) (including any inline 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.
    4. Inspect RCM C310A and C310B CPA lever/lock for correct operation. REFER to Restraints Control Module (RCM) .

    Were any concerns found? 

    1. Yes:
    2. 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 when directed to do so in the pinpoint test  . GO to 17  .
  17. CHECK FOR ADDITIONAL SRS DTCs 
    1. 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.
    2. Reconnect all SRS components (if previously disconnected).
    3. If previously directed to depower the SRS, repower the SRS. Do not  prove out the SRS at this time. REFER to Supplemental Restraint System (SRS) Depowering and Repowering - with Intelligent Access (IA) or REFER to Supplemental Restraint System (SRS) Depowering and Repowering - without Intelligent Access (IA) .
    4. Ignition ON.
    5. Using a scan tool, perform the Restraints  self-test to retrieve DTCs  .
      NOTE: When selecting Restraints from the Self Test menu, DTCs  are retrieved from the RCM and OCSM.

    Are any RCM and/or OCSM DTCs retrieved on-demand during self-test? 

    1. Yes:
    2. No
      • CLEAR all RCM and OCSM CMDTCs  . PROVE OUT the SRS. The repair is complete. RETURN the vehicle to the customer.
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