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Pinpoint Test A: DTC B1676

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: DTC B1317, B1318 or B1676 can 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. A1 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? 
    1. Yes:  REFER to CHARGING SYSTEM for diagnosis of the battery and charging system.
    2. No:  GO to A2  .
  2. A2 CHECK BATTERY CONDITION 
    • Ignition OFF.
    • Refer to BATTERY, MOUNTING AND CABLES and carry out Pinpoint Test A: Battery Condition Test.
    • Does 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 A3  .

    2. No:  INSTALL a new battery. CLEAR all CMDTCs  . TEST the system for normal operation.
  3. A3 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? 
    1. Yes:  GO to A4  .
    2. No:  REFER to CHARGING SYSTEM to diagnose the charging system. CLEAR all CMDTCs  . TEST the system for normal operation.
  4. A4 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN 
    • For vehicles equipped with a 3.0L engine  , with the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING & LIFTING -- ESCAPE, ESCAPE HYBRID, MARINER & MARINER HYBRID .
    • Ignition OFF.
    • Disconnect: ABS Module C155.
    • Measure the resistance between ABS module C155-16, circuit GD120 (BK/GN), harness side and ground.
      • Repeat this measurement while wiggling the harness.
        Fig 2: Measuring Resistance Between ABS Module C155-16 And Ground
        G06094493Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes:  GO to A5  .
    2. No:  REPAIR circuit GD120 (BK/GN). CLEAR all CMDTCs  . REPEAT the self-test.
  5. A5 CHECK FOR VOLTAGE AT THE ABS MODULE 
    • Ignition ON.
    • Measure the voltage between ground and:
      • ABS module C155-1, circuit SBB09 (RD), harness side.
      • ABS module C155-8, circuit CBP34 (VT/BN), harness side.
      • ABS module C155-32, circuit SBB18 (YE/RD), harness side.
        Fig 3: Measuring Voltage Between Ground And ABS Module C155-1
        G06094494Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. Yes:  GO to A6  .
    2. No:  VERIFY that BJB  fuses 9 (50A), 18 (20A) and 25 (5A) are OK. If OK, REPAIR the affected circuit(s).

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

      CLEAR the DTCs and REPEAT the self-test.

  6. A6 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Ignition OFF.
    • Check ABS module C155 for:
      • corrosion.
      • pushed-out/bent pins.
      • spread terminals.
    • Connect: ABS Module C155.
    • Make sure the connector seats correctly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. Yes:  INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.
    2. 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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