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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 328 (Charging System) >> Diagnosis And Testing >> Pinpoint Test >> Special Tool(s) >> Pinpoint Test B: DTC B1318, B1676, P0562 and/or P1397 >> Pinpoint Test B: DTC B1318, B1676 And/Or P1397

Pinpoint Test B: DTC B1318, B1676 And/Or P1397

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.
NOTE: Do not have a battery charger attached during vehicle testing.
  1. B1 CHECK THE BATTERY CONDITION 
    • Carry out the Battery - Condition Test to determine if the battery can hold a charge and is OK for use. Refer to BATTERY, MOUNTING AND CABLES .
    • Does the battery pass the condition test? 
    • Yes  : GO to B2.
    • No  : INSTALL a new battery. REFER to BATTERY, MOUNTING AND CABLES . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. B2 CHECK THE VEHICLE GROUNDS 
    • Start and idle the engine.
    • With the engine running at idle, headlamps ON and the heater blower set to HIGH, measure the voltage drop between the generator housing and the negative battery terminal.
      Fig 1: Measuring Voltage Drop Between Generator Housing And Negative Battery Terminal
      G06133592Courtesy of FORD MOTOR CO.
    • Is the voltage drop less than 0.25 volt (250 mV)? 
    • Yes  : GO to B3.
    • No  : INSPECT and REPAIR the engine ground, generator ground or the battery ground for corrosion. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  3. B3 CHECK THE VOLTAGE DROP IN THE B+ CIRCUIT 
    • With the engine running at idle, headlamps ON and the heater blower set to HIGH, measure the voltage drop between generator B+ C102B, circuit SDC14 (RD) (gas) or C1104B, circuit SDC14 (RD) (diesel) and the positive battery terminal.
      Fig 2: Measuring Voltage Drop Between Generator B+ C102B, Circuit SDC14 (RD) Or C1104B, Circuit SDC14 (RD) And Positive Battery Terminal
      G06065171Courtesy of FORD MOTOR CO.
    • Is the voltage drop less than 0.5 volt? 
    • Yes  : GO to B4.
    • No  : INSPECT and REPAIR any corrosion in the B+ SDC14 (RD) or positive battery cable connections. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. B4 CHECK FOR CURRENT DRAINS 
    • Carry out the Battery - Drain Testing component test. Refer to BATTERY, MOUNTING AND CABLES .
    • Are any circuits causing excessive current drains? 
    • Yes  : REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No  : No problems found at this time. CHECK with the customer to determine if any electrical system(s) may have been accidently left on. If nothing unusual is found, CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. GO to PINPOINT TEST D  to continue diagnosis of the charging system.
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