Instrument Cluster / Carrier: Description and Operation

ILLUMINATION

System Description
Control of the illumination lamps operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1ST or 2ND position (or if the auto light system is activated) the BCM (body control module) receives input requesting the illumination lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The CPU (central processing unit) of the IPDM E/R controls the tail lamp relay coil. When energized, this relay directs power to the illumination lamps, which then illuminate.

Power is supplied at all times
- through 10 A fuse (No. 41, located in the IPDM E/R)
- to tail lamp relay, located in the IPDM E/R, and
- through 50 A fusible link (letter f , located in the fuse and fusible link box)
- to BCM terminal 70.

With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No. 1, located in the fuse block (J/B)]
- to BCM terminal 38.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to BCM terminal 11.

Ground is supplied
- to BCM terminal 67
- through grounds F14, M57 and M61.

ILLUMINATION OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM receives input requesting the illumination lamps to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R controls the tail lamp relay coil which, when energized, directs power
- through IPDM E/R terminal 22
- to illumination control switch terminal 1
- to combination meter terminal 31
- to A/T device terminal 15 (with A/T)
- to TCS ON/OFF switch terminal 3 (with TCS)
- to audio unit terminal 8
- to hazard switch terminal 3
- to heated seat switch LH and RH terminal 1 (with heated seats)
- to front air control terminal 12
- to AV switch terminal 3 (with NAVI)
- to NAVI control unit terminal 26 (with NAVI)
- to glove box lamp terminal +.

With the ignition switch in ON or START, power is also supplied
- through BCM terminal 68
- to rear power window switch LH terminal 5
- to rear power window switch RH terminal 5
- to front power window switch RH terminal 5 (with left front only power window anti-pinch system) or terminal 13 (with left and right front power window anti-pinch system)
- to main power window and door lock/unlock switch terminal 12 (with left front only power window antipinch system) or terminal 17 (with left and right front power window anti-pinch system).

Ground is supplied
- to illumination control switch terminal 3
- to glove box lamp terminal -
- to combination meter terminal 24
- through grounds F14, M57 and M61, and
- to rear power window switch RH terminal 8
- through ground B117, and
- to rear power window switch LH terminal 8
- to NAVI control unit terminal 30 (with NAVI)
- through grounds B7 and B19.

The main power window and door lock/unlock switch and the front power window switch RH illumination circuits are case grounded.

Controlled ground is supplied
- through illumination control switch terminal 2
- to combination meter terminal 32
- to A/T device terminal 16 (with A/T)
- to TCS ON/OFF switch terminal 4 (with TCS)
- to audio unit terminal 7
- to hazard switch terminal 4
- to heated seat switch LH and RH terminal 2 (with heated seats)
- to front air control terminal 11
- to AV switch terminal 4 (with NAVI).

With power and ground supplied, illumination lamps illuminate.

BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST or 2ND position (or if auto light system is activated) and the ignition switch is turned from ON or ACC to OFF, the battery saver control feature is activated. Under this condition, the illumination lamps remain illuminated for 30 minutes unless the combination switch (lighting switch) position is changed. If the combination switch (lighting switch) position is changed, then the illumination lamps are turned off after a 30 second delay.

When the lighting switch is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after illumination lamps have been turned off by the battery saver control, the illumination lamps illuminate again.

CAN Communication System Description
Refer to LAN-20, Information Bus. Information Bus