Test T: Both Reversing Lamps Are Inoperative

PINPOINT TEST T: BOTH REVERSING LAMPS ARE INOPERATIVE

Normal Operation
Voltage is supplied from the battery junction box (BJB) fuse 26 (10A) to the coil side of the reversing lamps relay through circuit CBB26 (BU/WH). The reversing lamps relay switch side is supplied voltage by the BJB fuse 7 (10A) through circuit SBB07 (WH/RD). The reversing lamps relay coil ground is controlled by the PCM through circuit CLS28 (BU/WH). When the transaxle is in REVERSE (R), the PCM completes the ground, energizing the reversing lamps relay. When the reversing lamps relay is energized, voltage is routed to the reversing lamps through circuit CLS10 (GN/BN). The reversing lamps share a common ground with the stoplamps through circuit GD110 (BK/WH).

Automatic Transaxle
The PCM sets digital transmission range (TR) sensor related DTCs if any concerns exist with inputs from the TR sensor.

Manual Transaxle
The PCM sends a voltage reference signal to the reversing lamps relay through circuit CET47 (BU). When the transaxle is in REVERSE (R), the voltage reference signal is routed to back to the PCM through the signal return circuit RE242 (GN).

- DTC P1910 (Reverse Lamp Control Circuit/Open) - is an on-demand DTC that sets when the PCM detects an open from the reversing lamp relay coil ground control circuit.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Reversing lamps relay
- Reversing lamp switch (manual transaxle)
- PCM

T1-T2:

T3-T5:

T5-T8:

T8-T9:

T9-T10: