Cornering Lamp: Description and Operation

Cornering Lamps

DESCRIPTION

Introduction

NOTE: Cornering lamps are not fitted to NAS vehicles.

Cornering lamps are designed to illuminate the direction of travel when cornering at low speeds. The design of the lens projects a spread of light from the vehicle at approximately 45 ° to the vehicle axis. The cornering lamp is incorporated into the outer part of the headlamp assembly and shares the same housing and reflector as the side lamp.

Only one cornering lamp will illuminate at any one time. If the LH turn signal indicators are selected, the LH cornering lamp will illuminate. If the RH turn signal indicators are selected, the RH cornering lamp will illuminate.

Cornering lamps will not operate under the following conditions:
^ If the vehicle speed exceeds 25 mph (40 km/h)
^ Reverse gear is selected.

OPERATION

Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 11E and fusible link 15E (C0632) on an R wire. Both are located in the Battery Junction Box (BJB). Fusible link 15E (C0570) is connected to the LH and the RH cornering lamp Field Effect Transistors (FET) by an NG wire. Both are located in the Central Junction Box (CJB) (C0583).

Fusible link 11E (C0570) is connected to the ignition switch (C0028) by an N wire. When the ignition switch is in the 'ignition' position, current flows across the switch (C0028) to the CJB and fuse 62P (C0582) on a Y wire. Fuse 62P is located in the CJB.

Lighting Control Switch
The lighting control switch (C0041) is located on the instrument panel adjacent the steering wheel and is provided an ignition feed from fuse 62P (C0582) on an NP wire. When the switch is in position 2 (headlamps on), current flows across the switch (C0041) to the CJB (C0580) on a Y wire.

Turn Signal Indicator Switch
The CJB (C0580) monitors the condition of the turn signal indicator switch (C1393) by providing two feeds, one on a GR wire, one on a GW wire. When the switch is moved down to the LH turn position, current supplied on the GW wire flows across the switch contacts to ground on a B wire. When the switch is moved up to the RH turn position, current supplied on the GR wire flows across the switch contacts to ground on a B wire.

Central Junction Box
The Central Junction Box (CJB) (C0580) receives messages via the medium speed CAN bus on YW (high) and YU (low) wires from the instrument cluster (C0230). The instrument cluster acts as a gateway, receiving messages via the high speed CAN bus on YN (high) and YB (low) wires. The instrument cluster receives CAN bus messages from the following sources:
^ A measurement of steering angle from the steering angle sensor (C0862)
^ A vehicle speed signal from the transfer box control module (C1319).

NOTE: The vehicle speed signal originates from the ABS module (C0506).

RH Cornering Lamp
If the CJB determines the RH cornering lamp requires illuminating, it outputs a signal feed to the RH FET. This in turn provides a feed to the RH cornering lamp (C0011) on an R wire. The lamp is provided a ground path on a B wire.

LH Cornering Lamp
If the CJB determines the LH cornering lamp requires illuminating, it outputs a signal feed to the LH FET. This in turn provides a feed to the LH cornering lamp (C0009) on an R wire. The lamp is provided a ground path on a B wire.