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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 I: DTCs B299E and B29A8 -Suppressor Left/Right Circuit Resistance Low on Squib - Loop #1 >> PINPOINT TEST I: DTCs B299E AND B29A8 - SUPPRESSOR LEFT/RIGHT CIRCUIT RESISTANCE LOW ON SQUIB - LOOP #1

PINPOINT TEST I: DTCs B299E AND B29A8 - SUPPRESSOR LEFT/RIGHT CIRCUIT RESISTANCE LOW ON SQUIB - LOOP #1

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. I1 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 DTCs B299E or B29A8 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 I2.

    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. I2 CHECK THE FSM 
    • 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.
    • Measure the resistance between the FSM C3281a pin 4, component side and the FSM C3281a pin 5, component side; and between the FSM C3281a pin 12, component side and the FSM C3281a pin 13, component side.
      Fig 1: Checking The FSM
      G04585714Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes  : For DTC B299E, GO to I3.

    For DTC B29A8, GO to  I4.

    No  : INSTALL a new FSM. REFER to FIRE SUPPRESSION MODULE . GO to  I6.

  3. I3 CHECK THE LH SUPPRESSOR SQUIB 1 CIRCUITS FOR LOW RESISTANCE 
    • Connect: FSM C3281a.
    • Disconnect: Inline C339.
    • Measure the resistance between the inline C339-3, circuit 2312 (LG), body harness side and the inline C339-4, circuit 2313 (BK/WH), body harness side.
      Fig 2: Checking The LH Suppressor Squib 1 Circuits For Low Resistance
      G04585715Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : GO to  I5.

    No  : REPAIR circuits 2312 (LG) and 2313 (BK/WH). CONNECT the inline C339. CONNECT the battery. GO to  I6.

  4. I4 CHECK THE RH SUPPRESSOR SQUIB 1 CIRCUITS FOR LOW RESISTANCE 
    • Connect: FSM C3281a.
    • Disconnect: Inline C339.
    • Measure the resistance between the inline C339-1, circuit 2310 (OG), body harness side and the inline C339-2, circuit 2311 (DG), body harness side.
      Fig 3: Checking The RH Suppressor Squib 1 Circuits For Low Resistance
      G04585716Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : GO to I5.

    No  : REPAIR circuits 2310 (OG) and 2311 (DG). CONNECT the inline C339. CONNECT the battery. GO to  I6.

  5. I5 CHECK THE FIRE SUPPRESSORS 
    • Disconnect: Suspect Fire Suppressor.
    • Connect the battery.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self-Test.
      NOTE: DTCs B299A and B299F are expected to be retrieved when the self-test is performed with the LH Fire Suppressor C4317 disconnected. DTCs B29A4 and B29A9 are expected to be retrieved when the self-test is performed with the RH Fire Suppressor C4316 disconnected. These DTCs can be cleared once all the fire suppression connections are restored. If DTCs B299A, B299F, B29A4, or B29A9 are retrieved with all the fire suppression connections restored, refer to the FIRE SUPPRESSION MODULE (FSM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
    • Were DTCs B299E or B29A8 retrieved during the on-demand self-test? 

    Yes  : INSTALL a new fire suppression system harness (14C369). GO to I6.

    No  : If DTC B29A8 was retrieved in step  I1, INSTALL a new RH fire suppressor. REFER to FIRE SUPPRESSOR . GO to I6.

    If DTC B299E was retrieved in step  I1, INSTALL a new LH fire suppressor. REFER to FIRE SUPPRESSOR . GO to I6.

  6. I6 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous DTCs recorded during Step  I1.
    • Were any additional continuous DTCs retrieved during Step   I1 ? 

    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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