Diagnostic Routine B

Diagnostic Routine B

Diagnostic Overview

The AC Power Point LED is Never On

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

Normal Operation and Fault Conditions

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. The incoming DC (Direct Current) is internally converted to 60 Hz 110 volts AC (Alternating Current) that is outputted to the AC (Alternating Current) outlet. If a fault in the system is detected, the LED (Light-emitting Diode) flashes when the ignition is ON. The LED (Light-emitting Diode) is continuously illuminated if the system is operating correctly when the ignition is ON. The DC (Direct Current)- AC (Alternating Current) inverter supplies 12 volts DC (Direct Current) and ground to the LED (Light-emitting Diode) along two circuits.

Visual Inspection and Diagnostic Pre-checks

- 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 SYSTEM OPERATION

1. START the engine.

2. Connect a device with a rating of less than 150 watts to the AC (Alternating Current) outlet and verify power supply at the AC (Alternating Current) outlet.

Is power available at the AC (Alternating Current) outlet to operate the device?








2. CHECK THE LED (Light-emitting Diode) CONTROL CIRCUITS FOR AN OPEN

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

2. Disconnect AC (Alternating Current) Outlet C301.

3. Measure:





Are the resistances less than 5 ohms?








3. CHECK THE AC (Alternating Current) OUTLET LED (Light-emitting Diode)

1. Test the diode in both directions:





Is the resistance greater than 10,000 ohms in one direction and between 10-20 ohms in the opposite direction?