Diagnostic Routine AO

Diagnostic Routine AO

Diagnostic Overview

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. CARRY OUT THE BCM (Body Control Module) SELF-TEST

1. Ignition ON.

2. Using a scan tool, clear the DTCs (Diagnostic Trouble Codes).

3. Wait 10 seconds.

4. Using a scan tool, perform 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 BCM (Body Control Module)

1. Using a scan tool, perform the BCM (Body Control Module) on-demand self-test.

Are any charging system DTCs (Diagnostic Trouble Codes) recorded?






3. CHECK THE BATTERY CONDITION AND STATE OF CHARGE

1. 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 SUPPLY

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module).

3. Ignition ON.

4. Measure:





Are the voltages greater than 11 volts?






5. CHECK THE BCM (Body Control Module) PROCESSOR GROUND

1. Disconnect: BCM (Body Control Module) C2280A.

2. Measure:





Is the resistance less than 3 ohms?






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

1. Disconnect and inspect all 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. Connect the BCM (Body Control Module) connectors. Make sure they seat and latch correctly.

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

Is the concern still present?