Pinpoint Test Bx: DTC U3003:16

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

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 will result in false resistance readings. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.

BX1 RECHECK THE IPC DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC Self-Test.
- Clear the DTCs. Repeat the IPC self-test.
- Is DTC U3003:16 still present?
- Yes : GO to BX2.
- No : The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.
BX2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
- Enter the following diagnostic mode on the scan tool: PCM Self-Test.
- Carry out the PCM Key ON Engine OFF (KOEO) self-test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC P0620, P0622, P0625, P0626 or P065B set in the PCM?
- Yes : REFER to CHARGING SYSTEM -- FUSION, MILAN & MKZ article.
- No : GO to BX3.
BX3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Check the battery condition and verify that the battery is fully charged. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
- Is the battery OK and fully charged?
- Yes : GO to BX4.
- No : REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
BX4 CHECK THE IPC VOLTAGE INPUT
- Measure and record the voltage at the battery.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC voltage input PID (MODULE_VOLT). Monitor the voltage PID and compare the reading with the recorded battery voltage.
- Is the voltage within 0.2 volt of the recorded battery voltage?
- Yes : GO to BX7.
- No : GO to BX5.
BX5 CHECK THE IPC VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: IPC C220.
- Ignition ON.
- For non-Hybrid, measure the voltage between the IPC C220-21, circuit SBP26 (YE/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between IPC C220-21, Circuit SBP26 (YE/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- For Hybrid, measure the voltage between the IPC C220-19, circuit SBP26 (YE/RD), harness side and ground.
  
  Fig 2: Measuring Voltage Between IPC C220-19, Circuit SBP26 (YE/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage within 0.2 volt of the recorded battery voltage?
- Yes : GO to BX6.
- No : REPAIR circuit SBP26 (YE/RD) for high resistance. CLEAR the DTC. REPEAT the self-test.
BX6 CHECK THE IPC GROUND CIRCUIT
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- On non-Hybrid, measure the resistance between the IPC C220-5, circuit GD116 (BK/VT), harness side and ground.
  
  Fig 3: Measuring Resistance Between IPC C220-5, Circuit GD116 (BK/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- On Hybrid, measure the resistance between the IPC C220-9, circuit GD116 (BK/VT), harness side and ground.
  
  Fig 4: Measuring Resistance Between IPC C220-9, Circuit GD116 (BK/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to BX7.
- No : REPAIR circuit GD116 (BK/VT) for high resistance. CLEAR the DTCs. REPEAT the self-test.
BX7 CHECK FOR CORRECT IPC OPERATION
- Disconnect the IPC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IPC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new IPC . REFER to INSTRUMENT PANEL CLUSTER (IPC) . 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.