Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

No Power at the AC Power Point Or the AC Power Point LED Indicator Flashes With Ignition On

Refer to Wiring Diagram Set 44 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

NOTE: The electrical device powered by the AC (Alternating Current) outlet must not exceed 150 watts.

The DC (Direct Current)- AC (Alternating Current) inverter receives 12 volts DC (Direct Current) from the BJB (Battery Junction Box) and the BCM (Body Control Module) and is wired to chassis ground. Power from the BJB (Battery Junction Box) is available at all times, regardless of ignition status. Power from the BCM (Body Control Module) is available when the ignition is ON, or for up to 10 minutes after the ignition is turned OFF, as long as the front doors remain closed throughout that 10 minutes. The incoming DC (Direct Current) power is internally converted to 60 Hz 110 volts AC (Alternating Current) that is outputted to the AC (Alternating Current) outlet.

If the inverter is overloaded, overheated, or left on for more than 13 minutes without the engine on or the ignition being cycled, the green LED (Light-emitting Diode) flashes and the inverter stops supplying power to the AC (Alternating Current) outlet. If the inverter is overloaded or overheated, the ignition must be cycled after the issue is corrected before normal operation resumes.

Visual Inspection and Diagnostic Pre-checks

- Verify that any device being used in the AC (Alternating Current) outlet is rated at less than 150 watts.

- Verify that the AC (Alternating Current) outlet is not being used with the engine off for a period longer than 13 minutes without starting the engine or cycling the ignition.

- Verify that the cabin temperature is less than 75 C (166.9 F).

- Inspect BJB (Battery Junction Box) fuse 17 (40A)

- Inspect BCM (Body Control Module) fuse 32 (15A)

- Inspect for a damaged AC (Alternating Current) outlet

Pinpoint Test

1. CHECK THE POWER OUTLET LED (Light-emitting Diode) STATUS

1. Ignition OFF.

2. Start the engine.

3. Check the green LED (Light-emitting Diode) on the AC (Alternating Current) outlet.

Is the green LED (Light-emitting Diode) flashing?








2. CHECK THE POWER SUPPLY CIRCUITS FOR VOLTAGE

1. Ignition OFF.

2. Disconnect DC (Direct Current)/ AC (Alternating Current) Inverter C3501A.

3. Ignition ON.

4. Measure:





Are the voltages greater than 10 volts?








3. CHECK THE GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Measure:





Is the resistance less than 5 ohms?








4. CHECK THE AC (Alternating Current) OUTLET CIRCUITS FOR AN OPEN

1. Disconnect AC (Alternating Current) Outlet C301.

2. Disconnect DC (Direct Current)/ AC (Alternating Current) Inverter C3501B.

3. Measure:





Are the resistances less than 5 ohms?








5. CHECK THE AC (Alternating Current) OUTLET CIRCUITS FOR A SHORT TOGETHER

1. Measure:





Is the resistance greater than 10,000 ohms?








6. CHECK THE AC (Alternating Current) OUTLET CIRCUITS FOR A SHORT TO GROUND

1. Measure:





Are the resistances greater than 10,000 ohms?








7. CHECK THE AC (Alternating Current) OUTLET FOR AN OPEN

1. Measure:





Are the resistances less than 5 ohms?