Pinpoint Test 1

Pinpoint Test 1: The Courtesy Lamps Are Inoperative

Normal Operation
Power is supplied to the courtesy lamps through the smart junction box (SJB) fuse 9 (15 A), which supplies voltage to the courtesy lamps solid-state relay in the SJB. When any door is opened, the ajar switch opens, signaling the SJB. The SJB monitors the ajar circuits, and based on the ajar status, the SJB energizes the solid-state relay supplying voltage to the courtesy lamps on circuit (GY/V). The SJB also monitors the dome defeat output through circuit (W/BR). A short to ground on circuit (W/BR) will cause the courtesy lamps to be inoperative. Ground for the courtesy lamps is supplied through circuit (B/GY).
- DTC B2A35 (Courtesy Lighting Output Circuit Open) - is an on-demand DTC that sets when the SJB detects an open from the courtesy lighting circuit.
- DTC B2A36 (Courtesy Lighting Output Circuit Short to Ground) - is a continuous and on-demand DTC that sets when the SJB detects a short to ground from the courtesy lighting circuit.

Possible Causes
- Fuse
- Wiring, terminals or connectors
- Dimmer switch
- SJB

Diagnostic Procedure

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Make sure the interior lamp switches are in the DOOR position.

Step 1-Step 3:

Step 4-Step 7: