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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 452 (Fire Suppression System) >> Diagnosis And Testing >> Fire Suppression System >> Pinpoint Tests >> Pinpoint Test K: DTCs B29AF, B29B0, B29B1 and B29B2 - Fire Suppression Manual Switch Failure >> PINPOINT TEST K: DTCs B29AF, B29B0, B29B1 AND B29B2 - FIRE SUPPRESSION MANUAL SWITCH FAILURE

PINPOINT TEST K: DTCs B29AF, B29B0, B29B1 AND B29B2 - FIRE SUPPRESSION MANUAL SWITCH FAILURE

WARNING: This page is about a different car, the 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
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: The fire suppression system must be fully operational and free of faults before releasing the vehicle to the customer.
  1. K1 CHECK FOR A HARD OR INTERMITTENT DTC 
    WARNING: To reduce the risk of accidental deployment, never probe the connectors on the fire suppressors. Failure to follow this instruction may result in personal injury.
    • Enter the following diagnostic mode on the scan tool: Retrieve/Record/Flag Continuous DTCs.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self-Test.
    • Were DTC B29AF, B29B0, B29B1, or B29B2 retrieved during the on-demand self-test? 

    Yes  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self-test. GO to K2.

    No  : This is an intermittent fault. The fault condition is not present at this time. CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition lock cylinder frequently. REPEAT the self-test.

  2. K2 CHECK THE FIRE SUPPRESSION MANUAL SWITCH 
    • Key in OFF position.
      • WARNING: To reduce the risk of accidental deployment, do not use any memory saver devices. Failure to follow this instruction may result in personal injury.
    • Disconnect the battery. Refer to BATTERY, MOUNTING AND CABLES .
    • Wait approximately 60 seconds to allow the fire suppression module (FSM) back-up power supply to discharge.
    • Disconnect: FSM C3281a.
    • Disconnect: Inline C919.
    • While pressing and releasing the fire suppression manual switch, measure the resistance between the inline C919 pins, fire suppression manual switch wiring harness side as follows:
      SWITCH POSITION EXPECTED VALUE CHART

      Switch Position Measurement Expected Value
      Pressed Between pin 1 and pin 2 Less than 5 ohms
      Released Between pin 1 and pin 2 Between 1,710 and 1,890 ohms
      Pressed Between pin 3 and pin 4 Less than 5 ohms
      Released Between pin 3 and pin 4 Between 1,710 and 1,890 ohms
    • Are the resistance values correct? Yes  : For DTC B29AF GO to K4.

    Yes  : For DTC B29AF GO to  K4.

    For DTC B29B0 GO to  K6.

    For DTC B29B1 GO to  K8.

    For DTC B29B2 GO to  K12.

    No  : GO to K3.

  3. K3 CHECK THE FIRE SUPPRESSION MANUAL SWITCH WIRING HARNESS 
    • Disconnect: Fire Suppression Manual Switch C9034.
    • While pressing then releasing the fire suppression manual switch, measure the resistance between the fire suppression manual switch C9034 pins, component side as follows:
      SWITCH POSITION EXPECTED VALUE CHART

      Switch Position Measurement Expected Value
      Pressed Between pin 1 and pin 2 Less than 5 ohms
      Released Between pin 1 and pin 2 Between 1,710 and 1,890 ohms
      Pressed Between pin 3 and pin 4 Less than 5 ohms
      Released Between pin 3 and pin 4 Between 1,710 and 1,890 ohms
    • Are the resistance values correct? 

    Yes  : REPAIR or INSTALL a new fire suppression manual switch wiring harness. GO to  K14.

    No  : INSTALL a new fire suppression manual switch. REFER to FIRE SUPPRESSION MANUAL SWITCH . GO to  K14.

  4. K4 CHECK CIRCUIT 2319 (RD/YE) FOR AN OPEN 
    • Connect the battery.
    • Key in ON position.
    • Measure the voltage between the fire suppression manual switch C919-1, circuit 2319 (RD/YE), body harness side and ground.
      Fig 1: Measuring Voltage Between Fire Suppression Manual Switch C919-1, Circuit 2319 And Ground
      G04585717Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : GO to K5.

    No  : VERIFY the central junction box (CJB) fuse 33 (10A) is OK. If OK, DISCONNECT the battery. REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

  5. K5 CHECK CIRCUIT 2315 (BK/PK) FOR AN OPEN OR A SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between the FSM C3281a-10, circuit 2315 (BK/PK), harness side and ground; and between the FSM C3281a-10, circuit 2315 (BK/PK), harness side and the inline C919-2, circuit 2315 (BK/PK), body harness side.
      Fig 2: Checking Circuit 2315 (BK/PK) For An Open Or A Short To Ground
      G04585718Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms between the FSM and ground, and less than 5 ohms between the FSM and the fire suppression manual switch? 

    Yes  : INSTALL a new FSM. REFER to FIRE SUPPRESSION MODULE . GO to  K14.

    No  : DISCONNECT the battery. REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

  6. K6 CHECK CIRCUIT 2315 (BK/PK) FOR A SHORT TO VOLTAGE 
    • Connect the battery.
    • Key in ON position.
    • Measure the voltage between the FSM C3281a-10, circuit 2315 (BK/PK), harness side and ground.
      Fig 3: Checking Circuit 2315 (BK/PK) For A Short To Voltage
      G04585719Courtesy of FORD MOTOR CO.
    • Is any voltage present? 

    Yes  : DISCONNECT the battery. REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

    No  : GO to K7.

  7. K7 CHECK CIRCUIT 2315 (OG) IN THE FIRE SUPPRESSION MANUAL SWITCH WIRING HARNESS FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Connect: Inline C919.
    • Key in ON position.
    • Measure the voltage between the FSM C3281a-10, circuit 2315 (BK/PK), harness side and ground.
      Fig 4: Checking Circuit 2315 (OG) In The Fire Suppression Manual Switch Wiring Harness For A Short To Voltage
      G04585720Courtesy of FORD MOTOR CO.
    • Is any voltage present? 

    Yes  : REPAIR or INSTALL a new fire suppression manual switch wiring harness. GO to  K14.

    No  : INSTALL a new fire suppression manual switch. REFER to FIRE SUPPRESSION MANUAL SWITCH . GO to  K14.

  8. K8 CHECK CIRCUIT 1203 (BK/LB) FOR AN OPEN 
    • Measure the resistance between the inline C919-4, circuit 1203 (BK/LB), harness side and ground.
      Fig 5: Measuring Resistance Between Inline C919-4, Circuit 1203 (BK/LB) And Ground
      G04585721Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : GO to K9.

    No  : REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

  9. K9 CHECK CIRCUIT 2314 (LB/PK) FOR A SHORT TO VOLTAGE 
    • Connect the battery.
    • Key in ON position.
    • Measure the voltage between the FSM C3281a-11, circuit 2314 (LB/BK), harness side and ground.
      Fig 6: Checking Circuit 2314 (LB/PK) For A Short To Voltage
      G04585722Courtesy of FORD MOTOR CO.
    • Is any voltage present? 

    Yes  : DISCONNECT the battery. REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

    No  : GO to K10.

  10. K10 CHECK CIRCUIT 2314 (LB/PK) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the FSM C3281a-11, circuit 2314 (LB/BK), harness side and the inline C919-3, circuit 2314 (LB/BK), body harness side.
      Fig 7: Measuring Resistance Between FSM C3281a-11 And Inline C919-3 Body Harness Side
      G04585723Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : GO to K11.

    No  : DISCONNECT the battery. REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

  11. K11 CHECK CIRCUIT 2314 (YE) IN THE FIRE SUPPRESSION MANUAL SWITCH WIRING HARNESS FOR A SHORT TO VOLTAGE 
    • Connect: Inline C919.
    • Key in ON position.
    • Measure the voltage between the FSM C3281a-11, circuit 2314 (LB/BK), harness side and ground.
      Fig 8: Checking Circuit 2314 (YE) In The Fire Suppression Manual Switch Wiring Harness For A Short To Voltage
      G04585724Courtesy of FORD MOTOR CO.
    • Is any voltage present? 

    Yes  : REPAIR or INSTALL a new fire suppression manual switch wiring harness. GO to  K14.

    No  : INSTALL a new FSM. REFER to FIRE SUPPRESSION MODULE . GO to  K14.

  12. K12 CHECK CIRCUIT 2314 (LB/PK) FOR A SHORT TO GROUND 
    • Measure the resistance between the FSM C3281a-11, circuit 2314 (LB/BK), harness side and ground.
      Fig 9: Checking Circuit 2314 (LB/PK) For A Short To Ground
      G04585725Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : REPAIR the circuit. CONNECT the inline C919. CONNECT the FSM C3281a. GO to  K14.

    No  : GO to K13.

  13. K13 CHECK CIRCUIT 2314 (YE) IN THE FIRE SUPPRESSION MANUAL SWITCH WIRING HARNESS FOR A SHORT TO GROUND 
    • Connect: Inline C919.
    • Measure the resistance between the FSM C3281a-11, circuit 2314 (LB/BK), harness side and ground.
      Fig 10: Checking Circuit 2314 (YE) In The Fire Suppression Manual Switch Wiring Harness For A Short To Ground
      G04585726Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : INSTALL a new FSM. REFER to FIRE SUPPRESSION MODULE . GO to K14.

    No  : REPAIR or INSTALL a new fire suppression manual switch wiring harness. GO to K14.

  14. K14 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous DTCs recorded during Step  K1.
    • Were any additional continuous DTCs retrieved during Step   K1 ? 

    Yes  : GO to the FIRE SUPPRESSION MODULE (FSM) DIAGNOSTIC TROUBLE CODE (DTC) TABLE  to continue diagnosis of the fire suppression system.

    No  : CLEAR the DTCs. REPEAT the self-test.

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