LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1592 (Seat System - Seats) >> Diagnostic Tests >> Seats >> Pinpoint Tests >> Pinpoint Test V: The Power Lumbar is Inoperative - Passenger >> Pinpoint Test V: The Power Lumbar Is Inoperative - Passenger

Pinpoint Test V: The Power Lumbar Is Inoperative - Passenger

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. V1 CHECK CIRCUIT 566 (DG) FOR VOLTAGE 
    • Key in OFF position.
    • Depower the SRS. Refer to SGENERAL PROCEDURES article.
    • Disconnect: Passenger Seat Side Air Bag C316
    • Connect: Restraint System Diagnostic Tool 418-133 to Passenger Seat Side Air Bag C316
    • Disconnect: Passenger Lumbar Control Switch C331
      • 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 article.
      • Fig 1: Checking Circuit 566 (DG) For Voltage
      GF0013079Courtesy of FORD MOTOR CO.
    • Measure voltage between passenger lumbar control switch C331-2, circuit 566 (DG), harness side and ground.
    • Is voltage greater than 10 volts? 
    1. YES  : Go to  V2.
    2. NO  : VERIFY Battery Junction Box (BJB) fuse 15 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAM ARTICLE to identify the possible causes of the circuit short. TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

  2. V2 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
      Fig 2: Checking Circuit 57 (BK) For An Open
      GF0018519Courtesy of FORD MOTOR CO.
    • Measure resistance between:
      • passenger lumbar control switch C331-3, circuit 57 (BK), harness side and ground.
      • passenger lumbar control switch C331-6, circuit 57 (BK), harness side and ground.
    • Are resistances less than 5 ohms? 
    1. YES  : Go to  V3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

  3. V3 CHECK FOR VOLTAGE TO THE LUMBAR MOTOR 
    • Connect: Passenger Lumbar Control Switch C331
    • Disconnect: Passenger Lumbar Motor C336
      • Fig 3: Checking For Voltage To Lumbar Motor
      GF0018520Courtesy of FORD MOTOR CO.
    • Measure voltage between passenger lumbar motor C336-2, circuit 1097 (BN) and C336-1, circuit 1094 (PK) while operating the passenger lumbar control switch in both directions.
    • Is voltage greater than 10 volts with the switch in both directions? 
    1. YES  : INSTALL a new passenger lumbar motor. REFER to Lumbar Motor . TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

    2. NO  : Go to  V4.
  4. V4 CHECK CIRCUITS 1094 (PK) AND 1097 (BN) FOR A SHORT TO GROUND 
    • Disconnect: Passenger Lumbar Control Switch C331
      • Fig 4: Checking Circuits 1094 (PK) & 1097 (BN) For A Short To Ground
      GF0018521Courtesy of FORD MOTOR CO.
    • Measure resistance between:
      • passenger lumbar control switch C331-1, circuit 1097 (BN), harness side and ground.
      • passenger lumbar control switch C331-7, circuit 1094 (PK), harness side and ground.
    • Are resistances greater than 10,000 ohms? 
    1. YES  : Go to  V5.
    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

  5. V5 CHECK CIRCUITS 1094 (PK) AND 1097 (BN) FOR AN OPEN 
      Fig 5: Checking Circuits 1094 (PK) & 1097 (BN) For An Open
      GF0047499Courtesy of FORD MOTOR CO.
    • Measure resistance between:
      • passenger lumbar control switch C331-1, circuit 1097 (BN), harness side and passenger lumbar motor C336-2, circuit 1097 (BN), harness side.
      • passenger lumbar control switch C331-7, circuit 1094 (PK), harness side and passenger lumbar motor C336-1, circuit 1094 (PK), harness side.
    • Are resistances less than 5 ohms? 
    1. YES  : INSTALL a new passenger lumbar control switch. REFER to Lumbar Control Switch . TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to GENERAL PROCEDURES article.

scientia non olet · About LEMON Manuals