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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1389 (Anti-Lock Brake System - Vehicle Dynamic Systems) >> Diagnosis And Testing >> Anti-Lock Control - Non-Hybrid >> Pinpoint Tests >> Pinpoint Test B: DTC B1676 >> Pinpoint Test B: DTC B1676

Pinpoint Test B: DTC B1676

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
NOTE: DTC 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: Carry out a thorough inspection and verification before proceeding with the pinpoint test. Refer to INSPECTION AND VERIFICATION .
  1. B1 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 or B1676 present in one or more modules AND DTC P0563, P0620, P0625, P0626 or P065B present in the PCM? 
  2. B2 CHECK BATTERY CONDITION 
    • Yes:  If the battery passed the condition test, but required a recharge, REFER to DIAGNOSIS AND TESTING to diagnose the charging system. CLEAR the DTCs. REPEAT the self-test.

      If the battery passed the condition test and did not require a recharge, GO to  B3.

    • No:  INSTALL a new battery. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. REPEAT the self-test.
  3. B3 CHECK 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 battery voltage.
      • Turn on headlights and HVAC fan on high and run engine at 1,500 rpm for a minimum of 2 minutes while measuring battery voltage.
      Fig 1: Measuring Voltage Of Battery
      G06063926Courtesy of FORD MOTOR CO.
    • Are the voltages between 13 and 15.2 volts? 
    • Yes:  GO to  B4.
    • No:  REFER to DIAGNOSIS AND TESTING to diagnose the charging system. CLEAR the DTCs. REPEAT the self-test.
  4. B4 CHECK THE VOLTAGE TO THE ABS MODULE 
    NOTE: The degas bottle may need to be positioned aside to access the ABS module connector.
    • Ignition OFF.
    • Disconnect: ABS Module C135.
    • Ignition ON.
    • Measure the voltage between ground and:
      • ABS module C135-1, SBB08 (VT/RD), harness side.
      • ABS module C135-8, CBP42 (GN), harness side.
      • ABS module C135-32, SBB10 (YE/RD), harness side.
      Fig 2: Measuring Voltage Between Ground & ABS Module C135-1
      G06094494Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    • Yes:  GO to  B5.
    • No:  VERIFY BJB fuse 8 (40A) is OK. If OK, REPAIR circuit SBB08 (VT/RD).

      VERIFY SJB fuse 42 (10A) is OK. If OK, REPAIR circuit CBP42 (GN).

      VERIFY BJB fuse 10 (30A) is OK. If OK, REPAIR circuit SBB10 (YE/RD).

      If any fuse is not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.

      CLEAR the DTCs. REPEAT the self-test.

  5. B5 CHECK CIRCUIT GD123 (BK/GY) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ABS module C135-16, circuit GD123 (BK/GY), harness side and ground.
      Fig 3: Measuring Resistance Between ABS Module C135-16, Circuit GD123 (BK/GY), Harness Side & Ground
      G06257031Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  CLEAR the DTCs. REPEAT the self-test. If DTC B1676 is retrieved again, GO to  B6.
    • No:  REPAIR circuit GD123 (BK/GY). CLEAR the DTCs. REPEAT the self-test.
  6. B6 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Check ABS module C135 for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: ABS Module C135.
    • Make sure the connector seats correctly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new ABS module. REFER to Removal and Installation . CLEAR the DTCs. REPEAT the self-test.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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