Diagnostic Routine H

Diagnostic Routine H

Diagnostic Overview

DTC U3003:16

Refer to Wiring Diagram Set 10 for schematic and connector information Electrical Diagrams.

Refer to Wiring Diagram Set 13 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

DTC Fault Trigger Conditions







Pinpoint Test

1. RECHECK THE BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)

1. Ignition ON.

2. Using a scan tool, perform BCM (Body Control Module) self-test.

3. Clear the DTCs (Diagnostic Trouble Codes). Repeat the BCM (Body Control Module) self-test.

Is DTC (Diagnostic Trouble Code) U3003:16 still present?








2. CHECK FOR CHARGING SYSTEM DTCs (Diagnostic Trouble Codes) IN THE PCM (Powertrain Control Module)

1. Using a scan tool, perform PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

2. Retrieve the continuous memory DTCs (Diagnostic Trouble Codes) from the PCM (Powertrain Control Module).

Is DTC (Diagnostic Trouble Code) P0562, P0620, P0622, P0625, P0626 or P065B set in the PCM (Powertrain Control Module)?








3. CHECK THE BATTERY CONDITION AND STATE OF CHARGE

1. Ignition OFF.

2. Check the battery condition and verify the battery is fully charged. REFER to Diagnostic Routine A: Battery Condition Test Pinpoint Tests.

Is the battery OK and fully charged?








4. CHECK THE BCM (Body Control Module) VOLTAGE PID (Parameter Identification)

1. Ignition ON.

2. Measure and record the voltage at the battery.

3. Using a scan tool, view BCM (Body Control Module) voltage PID (Parameter Identification) (V_BATT).

Is the voltage within 0.2 volt of the recorded battery voltage?








5. CHECK THE BCM (Body Control Module) VOLTAGE SUPPLY

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280G.

3. Ignition ON.

4. Measure:





Is the voltage within 0.2 volt of the recorded battery voltage?








6. CHECK THE BCM (Body Control Module) GROUND CIRCUIT FOR HIGH RESISTANCE

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280D.

3. Measure:





Is the resistance less than 3 ohms?








7. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Disconnect the BCM (Body Control Module) connectors.

2. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

3. Reconnect the BCM (Body Control Module) connectors and make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?