Instrument Cluster / Carrier: Description and Operation

ILLUMINATION

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

Power is supplied at all times
- through 10 A fuse (No. 71, located in IPDM E/R)
- to CPU located in IPDM E/R, and
- to tail lamp relay, located in IPDM E/R.

Power is also supplied at all times
- through 50 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse[No.18 located in fuse block (J/B)]
- to BCM terminal 42,
- through 15 A fuse (No. 78 located in IPDM E/R)
- to CPU located in IPDM E/R.

With ignition switch in ON or START position, power is supplied
- to CPU located in IPDM E/R, from battery direct,
- through 10 A fuse [No. 1, located in fuse block (J/B)]
- to BCM terminal 38,
- through 10 A fuse [No. 14 located in fuse block (J/B)]
- to combination meter terminals 22 and 23,
- through 10 A fuse [No.12 located in fuse block (J/B)]
- to display and A/C auto amp. terminal 2, and
- to NAVI control unit terminal 26 (with navigation system).

With ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11
- to combination meter terminal 18
- to NAVI control unit terminal 6 (with navigation system), and
- to display unit terminal 19 (with navigation system).

Ground is supplied
- to BCM terminal 52
- to display and A/C auto amp. terminal 5
- to combination meter terminal 1, 24, and 25
- to NAVI control unit terminal 1 and 4 (with navigation system), and
- to display unit terminal 22 and 24 (with navigation system)
- through grounds M30 and M66,
- to IPDM E/R terminals 38 and 60
- through grounds E17 and E43.

ILLUMINATION OPERATION BY LIGHTING SWITCH
With lighting switch in the 1ST or 2ND position (or if auto light system is activated), BCM receives input signal requesting illumination lamps to illuminate. This input signal is communicated to IPDM E/R across the CAN communication lines. The CPU located in the IPDM E/R controls tail lamp relay coil, which, when energized, directs power
- through IPDM E/R terminal 22
- to combination meter terminal 10
- to glove box lamp terminal 1
- to A/T illumination terminal 1 (with A/T)
- to illumination control switch terminal 1
- to VDC off switch (illumination) terminal 3
- to hazard switch (illumination) terminal 3
- to heated seat switch (driver side) (illumination) terminal 5 (with heater seat)
- to heated seat switch (passenger side) (illumination) terminal 5 (with heater seat)
- to A/C and audio controller terminal 9
- to display and A/C auto amp. terminal 1
- to ashtray illumination and cigarette lighter socket illumination terminal 5
- to NAVI control unit (illumination) terminal 25 (with navigation system)
- to NAVI switch RH (illumination) terminal 2 (with navigation system)
- to snow mode switch (illumination) terminal 5 (AWD models)
- to audio unit terminal 8
- to upper grove box lamp terminal 1 (without navigation system)
- to trunk lid opener switch (illumination) terminal 3, and
- to combination switch (spiral cable) terminal 26
- through combination switch (spiral cable) terminal 18
- to ASCD steering switch illumination
- to steering wheel audio control switch illumination (with steering wheel audio control switch).

Ground is supplied at all times
- to combination meter terminal 9
- to NAVI switch terminal 3 (with navigation system)
- to VDC off switch (illumination) terminal 4
- to A/T illumination terminal 2 (with A/T)
- to hazard switch (illumination) terminal 4
- to display and A/C auto amp. terminal 21
- to A/C and audio controller terminal 10
- to heated seat switch (driver side) (illumination) terminal 6 (with heated seat)
- to heated seat switch (passenger side) (illumination) terminal 6 (with heated seat)
- to combination switch (spiral cable) terminals 21 and 27 (with steering wheel audio control switch)
- to snow mode switch (illumination) terminal 6 (AWD models)
- to audio unit terminal 7, and
- to trunk lid opener switch (illumination) terminal 4
- through illumination control switch terminal 2,
- to ashtray illumination and cigarette lighter socket illumination terminal 4
- to illumination control switch terminal 3
- to upper grove box lamp terminal 2 (without navigation system), and
- to glove box lamp terminal 2
- through grounds M30 and M66.

With power and ground supplied, illumination lamps illuminate.

EXTERIOR LAMP BATTERY SAVER CONTROL
When the lighting switch is in the 1ST or 2ND position (or if auto light system is activated), and ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.

Under this condition, illumination lamps remain illuminated for 5 minutes, then illumination lamps are turned off.

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

Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit
Refer to "CAN Communication Unit".