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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 155 (Seat System - F150) >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test AL: DTCs B1317, B1318 and B2486 >> PINPOINT TEST AL: DTCs B1317, B1318 AND B2486

PINPOINT TEST AL: DTCs B1317, B1318 AND B2486

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When taking measurements at Dual Climate Controlled Seat Module (DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.
NOTE: DTC B1317, B1318 or B1676 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
NOTE: If a seat equipped with a seat mounted side air bag is being repaired, the Supplemental Restraint System (SRS) must be depowered. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. AL1 RETRIEVE ALL CMDTCs IN ALL MODULES 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - ALL CMDTCs.
    • Is DTC B1317, B1318, B2486, B1676, U3003:16 or U3003:17 present in one or more modules and are any charging system DTCs present in the PCM? 
      1. Yes  : REFER to CHARGING SYSTEM to diagnose the charging system.
      2. No  : GO to AL2.
  2. AL2 CHECK THE BATTERY CONDITION 
    NOTE: DTC B1317, B1318, B2486, B1676, U3003:16 or U3003:17 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
    • Ignition OFF.
    • Carry out the Battery Condition Test. REFER to BATTERY, MOUNTING AND CABLES .
    • Did the battery pass the condition test? 
      1. Yes  : If the battery passed the condition test but required a recharge, REFER to CHARGING SYSTEM to diagnose the charging system. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). TEST the system for normal operation. If the battery passed the condition test and did not require a recharge, GO to AL3.
      2. No  : INSTALL a new battery. CLEAR all CMDTCs. TEST the system for normal operation.
  3. AL3 CHECK THE CHARGING SYSTEM VOLTAGE 
    NOTE: Do not allow the engine speed to increase above 2, 000 RPM while performing this step or the generator may self excite and result in default charging system output voltage. If engine speed goes above 2, 000 RPM, shut the vehicle OFF and restart the engine before performing this step.
    • Start the engine.
    • Measure the voltage of the battery with and without a load on the charging system as follows:
      • Turn off all accessories and run the engine at 1, 500 RPM for a minimum of 2 minutes while measuring the battery voltage.
      • Turn on the headlights and HVAC blower on high and run engine at 1, 500 RPM for a minimum of 2 minutes while measuring the battery voltage.
        Fig 1: Measuring Voltage Of Battery With And Without Load On Charging System
        G06544266Courtesy of FORD MOTOR CO.
    • Are the voltages between 13 and 15.2 volts? 
      1. Yes  : For DSM DTC B1317 or B1318, GO to AL4.

        For DCSM DTC B2486, GO to  AL7.

      2. No  : REFER to CHARGING SYSTEM to diagnose the charging system. CLEAR all CMDTCs. TEST the system for normal operation.
  4. AL4 CHECK FOR VOLTAGE TO THE DSM 
    • Ignition OFF.
    • Depower the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Driver Seat Side Air Bag Module C3051.
    • Disconnect: DSM C341A and C341B.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. REFER to BATTERY, MOUNTING AND CABLES .
    • Ignition ON.
    • Measure the voltage between DSM C341A-1, circuit CBX05 (VT/RD), harness side and ground.
      Fig 2: Measuring Voltage Between DSM C341A-1, Circuit CBX05 (VT/RD), Harness Side And Ground
      G06285142Courtesy of FORD MOTOR CO.
    • Measure the voltage between DSM C341B-1, circuit CBX03 (BU/RD), harness side and ground.
      Fig 3: Measuring Voltage Between DSM C341B-1, Circuit CBX03 (BU/RD), Harness Side And Ground
      G06173461Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
      1. Yes  : GO to AL5.
      2. No  : VERIFY the Battery Junction Box (BJB) fuse 74 (30A) and Body Control Module (BCM) 7 (7.5A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams Information to identify possible causes of the circuit short. CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  5. AL5 CHECK THE DSM GROUND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
      • DSM C341A-2, circuit GD906 (BK/GY), harness side and ground.
      • DSM C341B-24, circuit GD905 (BK/GN), harness side and ground.
        Fig 4: Measuring Resistance Between DSM C341A-2, Circuit GD906 (BK/GY), Harness Side And Ground
        G06285266Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Are the resistances less than 5 ohms? 
      1. Yes  : GO to AL6.
      2. No  : REPAIR the circuit(s). CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  6. AL6 CHECK FOR CORRECT DSM OPERATION 
    • Check the harness and component side connectors for the following:
      • corrosion.
      • damaged pins.
      • pushed-out pins.
    • Connect: DSM C341A and C341B.
    • Make sure the DSM connectors are seated correctly.
    • Operate the memory seat, mirrors and pedals to verify correct memory system operation.
    • Enter the following diagnostic mode on the scan tool: Self Test - DSM.
    • Is DTC B1317 or B1318 still present? 
      1. Yes  : INSTALL a new DSM. REFER to DRIVER SEAT MODULE (DSM)  . CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

      2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all CMDTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  7. AL7 CHECK FOR VOLTAGE TO THE DCSM 
    • Ignition OFF.
    • Depower the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Passenger Seat Side Air Bag Module C339.
    • Disconnect: DCSM C3265A.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. REFER to BATTERY, MOUNTING AND CABLES .
    • Ignition ON.
    • Measure the voltage between:
      • DCSM C3265A-E, circuit CBX01 (GN/RD), harness side and ground.
      • DCSM C3265A-F, circuit CBX01 (GN/RD), harness side and ground.
        Fig 5: Measuring Voltage Between DCSM C3265A-E, Circuit CBX01 (GN/RD), Harness Side And Ground
        G06134437Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
      1. Yes  : GO to AL8.
      2. No  : VERIFY the BJB fuse 69 (30A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams Information to identify possible causes of the circuit short. CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  8. AL8 CHECK THE DCSM GROUND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between DCSM C3265A-M, circuit GD903 (BK/WH), harness side and ground.
      Fig 6: Measuring Resistance Between DCSM C3265A-M, Circuit GD903 (BK/WH), Harness Side And Ground
      G06075830Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Is the resistance less than 5 ohms? 
      1. Yes  : GO to AL9.
      2. No  : REPAIR the circuit. CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  9. AL9 CHECK FOR CORRECT DCSM OPERATION 
    • Check the harness and component side connectors for the following:
      • corrosion.
      • damaged pins.
      • pushed-out pins.
    • Connect: DCSM C3265A.
    • Make sure the DCSM connector is seated correctly.
    • Start the engine.
    • Operate the climate controlled seats and verify system operation.
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Is DTC B2486 still present? 
      1. Yes  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM)  . CLEAR all CMDTCs. REPEAT the self-test.

        DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

      2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all CMDTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
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