Circuit/System Testing

Without Third Row Display

1. Ignition OFF, disconnect the harness connector of the rear video display. Ignition ON, with a DMM verify there is 100 to 300 Hz on the video display brightness control signal circuit.
   • If 100 to 300 Hz is not present on the video display brightness control signal circuit test for an open, a short to voltage, or a short to ground. If the video display brightness control signal circuit tests normal, replace the radio.
2. If 100 to 300 Hz is present and the video display brightness control signal circuit tests normal, replace the rear video display.

With Third Row Display

1. With a scan tool clear the DTC. Ignition OFF, Disconnect the third row video display. Ignition ON, verify the DTC resets.
   • If the DTC does not reset, replace the third row video display.
2. Ignition OFF, disconnect the harness connector of the rear video display. Ignition ON, with a DMM verify there is 100 to 300 Hz on the video display brightness control signal circuit.
   • If 100 to 300 Hz is present and the video display brightness control signal circuit tests normal, replace the front rear video display.
   • If 200 Hz is not present on the video display brightness control signal circuit test for an open, a short to voltage, or a short to ground. If the video display brightness control signal circuit tests normal, replace the radio.