Pinpoint Test I: DTC U3003:62

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed results in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .

NOTE: DTC U3003:62 may be stored in the module memory due to previous battery charging or vehicle jump starting events.

I1 RECHECK THE BCM-B DTCs
- Ignition OFF.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: BCM-B Self-Test.
- Clear the DTCs. Repeat the BCM-B self-test.
- Is DTC U3003:62 still present?
- Yes : GO to I2.
- No : The system is operating normally at this time. The DTC may have been set due to a previous low battery voltage condition, during battery charging or while jump starting the vehicle.
I2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
- Enter the following diagnostic mode on the scan tool: PCM Self-Test.
- Carry out the PCM KOEO self-test.
- Retrieve the continuous memory DTCs from the PCM.
- Is DTC P0562, P0620, P0622, P0625, P0626 or P065B set in the PCM?
- Yes : REFER to CHARGING SYSTEM .
- No : GO to I3.
I3 CHECK FOR DTCs B1317, B1318 B1676, P0563 OR U3003:62 SET IN OTHER MODULES
- Enter the following diagnostic mode on the scan tool: Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC B1317, B1676, P0563 (PCM) or U3003:17 set in more than one module?
- Yes : REFER to CHARGING SYSTEM to diagnose the charging system condition.
- No : GO to I4.
I4 CHECK THE BATTERY VOLTAGE
- Turn off all interior/exterior lights and accessories.
- Start and run the engine at approximately 2, 000 rpm for 3 minutes while monitoring the battery voltage.
- Does the battery voltage rise to 15 volts or higher?
- Yes : REFER to CHARGING SYSTEM to diagnose an overcharging condition.
- No : GO to I5.
I5 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Ignition OFF.
- Check the battery condition and verify the battery is fully charged. Refer to BATTERY, MOUNTING AND CABLES .
- Is the battery OK and fully charged?
- Yes : GO to I6.
- No : REFER to CHARGING SYSTEM .
I6 CHECK THE BCM-B VOLTAGE PID
- Ignition ON.
- Measure and record the voltage at the battery.
- Enter the following diagnostic mode on the scan tool: BCM-B DataLogger.
- Monitor the BCM-B voltage PID (VPWR_BCMB).
- Is the voltage within 0.2 volt of the recorded battery voltage?
- Yes : GO to I9.
- No : GO to I7.
I7 CHECK THE BCM-B VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: BCM-B C4368a.
- Ignition ON.
- Measure the voltage between the BCM-B C4368a-1, circuit SBB18 (YE/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between BCM-B C4368a-1, Circuit SBB18 (YE/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage within 0.2 volt of the recorded battery voltage?
- Yes : GO to I8.
- No : REPAIR circuit SBB18 (YE/RD) for high resistance.
  CLEAR the DTC. REPEAT the self-test.
I8 CHECK THE BCM-B GROUND CIRCUIT FOR HIGH RESISTANCE
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the BCM-B C4368a-13, circuit GD110 (BK/WH), harness side and ground.
  
  Fig 2: Measuring Resistance Between BCM-B C4368a-13, Circuit GD110 (BK/WH) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to I9.
- No : REPAIR circuit GD110 (BK/WH) for high resistance.
  CLEAR the DTC. REPEAT the self-test.
I9 CHECK FOR CORRECT BCM-B OPERATION
- Disconnect the BCM-B connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the BCM-B connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new BCM-B. REFER to BODY CONTROL MODULE B (BCM-B) . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.