System Description
Headlamp operation is controlled by the BCM (body control module) based on inputs from the combination switch (lighting switch). When the lighting switch is placed in the 2ND position, the BCM receives an input signal requesting the headlamps (and tail lamps) illuminate. The BCM sends a signal, via the CAN communication lines, to the IPDM E/R (intelligent power distribution module engine room) requesting the headlamps be turned ON. The CPU (central processing unit) located in the IPDM E/R controls ground for the headlamp high and headlamp low relay coils. These relays direct power to the respective headlamps, which then illuminate.
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives an input signal requesting the headlamps to illuminate. The BCM then sends a signal, via the CAN communication lines, to the IPDM E/R requesting the low beam headlamps be turned ON. The CPU located in the IPDM E/R controls ground to the headlamp low relay coil, which when energized, directs power
- through 15A fuse (No. 41, located in IPDM E/R)
- through IPDM E/R terminal 54
- to headlamp RH terminal 3, and
- through 15A fuse (No. 40, located in IPDM E/R)
- through IPDM E/R terminal 52
- to headlamp LH terminal 3.
Ground is supplied
- to headlamp RH and LH terminals 5
- through grounds E9, E15 (all models) and E24 (with MR20DE).
With power and ground supplied, low beam headlamps illuminate.
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and high beam switch in the HIGH position, the BCM receives an input signal requesting the headlamp high beams to illuminate. The flash to pass feature can be used any time and also sends a signal to the BCM. This input signal is then communicated to the IPDM E/R and the combination meter via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp high relays (LH and RH), which when energized, directs power
- through 10A fuse (No. 34, located in IPDM E/R)
- through IPDM E/R terminal 56
- to headlamp RH terminal 6, and
- through 10A fuse (No. 35, located in IPDM E/R)
- through IPDM E/R terminal 55
- to headlamp LH terminal 6.
Ground is supplied
- to headlamp RH and LH terminal 5
- through grounds E9, E15 (all models) and E24 (with MR20DE).
With power and ground supplied, the high beam headlamps illuminate.
The BCM sends a signal, via the CAN communication lines, to the combination meter requesting the high beam indicator lamp be turned ON.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to " SYSTEM DESCRIPTION ".
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Headlamp operation is controlled by the BCM (body control module) based on inputs from the combination switch (lighting switch). When the lighting switch is placed in the 2ND position, the BCM receives an input signal requesting the headlamps (and tail lamps) illuminate. The request is then communicated to the IPDM E/R (intelligent power distribution module engine room) via the CAN communication lines. The CPU (central processing unit) located in the IPDM E/R controls ground for the headlamp high and headlamp low relay coils. These relays direct power to the respective headlamps, which then illuminate. When the headlamp switch is OFF or in the 1ST position (parking lamps ON), the parking brake is released and the engine is running, the IPDM E/R de-energizes the headlamp relays and supplies ground to the daytime light relay 1 to actuate the daytime light function.
With the lighting switch in 2ND position, the BCM receives an input signal requesting the headlamps to illuminate. This input signal is communicated to the IPDM E/R via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp low relay coil, which when energized, directs power
- through 15A fuse (No. 41, located in IPDM E/R)
- through IPDM E/R terminal 54
- to front combination lamp RH terminal 3
- through 15A fuse (No. 40, located in IPDM E/R)
- through IPDM E/R terminal 52
- to daytime light relay 2 terminals 1 and 3 (energizing the relay) and
- through daytime light relay 2 terminal 5
- to front combination lamp LH terminal 3.
Ground is supplied
- to front combination lamp RH terminal 5
- through grounds E9, E15 and E24
- to headlamp LH terminal 5 via
- daytime light relay 1 terminals 3 and 4
- through grounds E9, E15 (all models) and E24 (with MR20DE).
With power and ground supplied, low beam headlamps illuminate.
High Beam/Flash-to-Pass Operation
With the lighting switch in 2ND position and high beam switch in the HIGH position, the BCM receives input signal requesting the headlamp high beams to illuminate. The flash-to-pass feature can be used any time and also sends a signal to the BCM. This input signal is communicated to the IPDM E/R and the combination meter via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp high relay coil, which when energized, directs power
- through 10A fuse (No. 34, located in IPDM E/R)
- through IPDM E/R terminal 56
- to front combination lamp RH terminal 6, and
- through 10A fuse (No. 35, located in IPDM E/R)
- through IPDM E/R terminal 55
- to front combination lamp LH terminal 6.
Ground is supplied
- to front combination lamp RH terminal 5
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to front combination lamp LH terminal 5 via
- daytime light relay 1 terminals 3 and 4
- through grounds E9, E15 (all models) and E24 (with MR20DE).
With power and ground supplied, the high beam headlamps illuminate.
The BCM sends a signal to the combination meter requesting the high beam indicator lamp to turn ON.
Daytime Light System Operation
With the lighting switch in the OFF or 1ST position (parking lamps ON), the BCM receives inputs requesting the headlights off. If the parking brake is released and the engine is running, the BCM then sends a signal, via the CAN communication lines, requesting the IPDM E/R to activate the daytime light system. The CPU located in the IPDM E/R controls the daytime light relay 1 coil, which when energized, directs power
- from daytime light relay 1 terminal 3
- to front combination lamp LH terminal 5
- through front combination lamp LH high beam terminal 6
- to IPDM E/R terminal 55
- through 10A fuse (No. 35, located in IPDM E/R) and
- through both de-energized headlamp high relays
- to 10A fuse (No. 34, located in IPDM E/R)
- through IPDM E/R terminal 56
- to front combination lamp RH high beam terminal 6.
Ground is supplied
- to front combination lamp RH terminal 5 and
- to daytime light relay 1 terminal 4
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to daytime light relay 1 terminal 1
- through IPDM E/R terminal 49.
With power and ground supplied, high beam headlamps illuminate at reduced intensity.
Refer to " SYSTEM DESCRIPTION ".
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The front fog lamps are controlled by lighting switch inputs to the BCM (body control module). The lighting switch must be in the 1ST or 2ND position with the high beams OFF before the BCM will request the IPDM E/R (intelligent power distribution module engine room) to turn the front fog lamps on. The BCM requests the front fog lamps over the CAN communication lines to the IPDM E/R. The CPU (central processing unit) of the IPDM E/R controls the front fog lamp relay coil ground. When energized, the relay directs power to the front fog lamps.
FOG LAMP OPERATION
The front fog lamp switch is built into the lighting switch. The lighting switch must be in 1ST position or 2ND position and front fog lamp switch must be in the ON position for front fog lamp operation. The fog lamp will not operate with the high beam headlamps ON.
When the front fog lamp switch is in the ON position, the BCM sends a request, via the CAN communication lines, to the CPU of the IPDM E/R to ground the coil side of the front fog lamp relay. The front fog lamp relay then directs power
- through 15A fuse (No. 56, located in IPDM E/R)
- through IPDM E/R terminal 50
- to front fog lamp LH terminal 1, and
- through IPDM E/R terminal 51
- to front fog lamp RH terminal 1.
Ground is supplied
- to front fog lamp LH and RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE).
With power and ground supplied, front fog lamps illuminate.
Refer to " SYSTEM DESCRIPTION ".
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Scheme 12
TURN SIGNAL OPERATION
Power is supplied at all times
- through 50A fusible link (letter j, located in the fuse and fusible link box)
- to BCM (body control module) terminal 70
- through 10A fuse [No. 21, located in the fuse block (J/B)]
- to BCM terminal 57
- through 10A fuse [No. 19, located in the fuse block (J/B)]
- to combination meter terminal 1.
With the ignition switch in the ON or START position, power is supplied
- through 10A fuse [No. 12, located in fuse block (J/B)]
- to BCM terminal 38
- through 10A fuse [No. 14, located in fuse block (J/B)]
- to combination meter terminal 2.
With the ignition switch in the ACC or ON position, power is supplied
- through 10A fuse [No. 6, located in the fuse block (J/B)]
- to BCM terminal 11.
Ground is supplied
- to BCM terminal 67 and
- to combination meter terminals 3 and 21
- through grounds M57 and M61.
LH Turn Signal Lamp
When the turn signal switch is moved to the left turn position, the BCM receives an input signal requesting left turn signals to flash. The BCM then supplies power
- through BCM terminal 60
- to front combination lamp LH terminal 4 and
- to rear combination lamp LH terminal 6.
Ground is supplied
- to front combination lamp LH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to rear combination lamp LH terminal 4
- through grounds B7 and B19.
The BCM also sends a request, via the CAN communication lines, to the combination meter to flash the left turn signal indicator. The unified meter control unit in the combination meter supplies ground to the left turn signal indicator lamp and activates the audible turn signal indicator.
With power, ground and input supplied, the BCM controls the flashing of the turn signal lamps.
RH Turn Signal Lamp
When turn signal switch is moved to the right turn position, the BCM receives an input signal requesting right turn signals to flash. The BCM then supplies power
- through BCM terminal 61
- to front combination lamp RH terminal 4 and
- to rear combination lamp RH terminal 6.
Ground is supplied
- to front combination lamp RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to rear combination lamp RH terminal 4
- through grounds B7 and B19.
The BCM also sends a request, via the CAN communication lines, to the combination meter to flash the right turn signal indicator. The unified meter control unit in the combination meter supplies ground to the right turn signal indicator lamp and activates the audible turn signal indicator.
With power, ground and input supplied, the BCM controls the flashing of the turn signal lamps.
HAZARD LAMP OPERATION
Power is supplied at all times
- through 50A fusible link (letter j, located in fuse, fusible link and relay box)
- to BCM terminal 70
- through 10A fuse [No. 21, located in fuse block (J/B)]
- to BCM terminal 57
- through 10A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 1.
Ground is supplied
- to hazard switch terminal 1
- to BCM terminal 67, and
- to combination meter terminals 3 and 21
- through grounds M57 and M61.
When hazard switch is depressed, ground is supplied
- through hazard switch terminal 2
- to BCM terminal 29.
BCM then supplies power
- to front combination lamp LH terminal 4 and
- to rear combination lamp LH terminal 6
- through BCM terminal 60
- to front combination lamp RH terminal 4 and
- to rear combination lamp RH terminal 6
- through BCM terminal 61.
Ground is supplied
- to front combination lamp LH and RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to rear combination lamp LH and RH terminal 4
- through grounds B7 and B19.
The BCM also supplies input to combination meter across the CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.
With power and input supplied, BCM controls flashing of hazard warning lamps.
REMOTE KEYLESS ENTRY SYSTEM OPERATION
Power is supplied at all times
- through 50A fusible link (letter j, located in fuse, fusible link and relay box)
- to BCM terminal 70
- through 10A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 1.
Ground is supplied
- to BCM terminal 67 and
- to combination meter terminals 3 and 21
- through grounds M57 and M61.
When the remote keyless entry system is triggered by input from the keyfob, the BCM supplies power
- through BCM terminal 60
- to front combination lamp LH terminal 4 and
- to rear combination lamp LH terminal 6
- through BCM terminal 61
- to front turn signal lamp RH terminal 4 and
- to rear combination lamp RH terminal 6.
Ground is supplied
- to front combination lamp LH and RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to rear combination lamp LH and RH terminal 4
- through grounds B7 and B19.
The BCM also supplies input to combination meter via the CAN communication lines. This input is processed by the unified meter control unit in combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.
With power and ground supplied, BCM controls flashing of hazard warning lamps when keyfob is used to activate remote keyless entry system.
Refer to " SYSTEM DESCRIPTION ".
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The control of the parking, license plate and tail lamp operation is dependent upon the position of lighting switch. When the lighting switch is placed in the 1ST position, the BCM (body control module) receives input signal requesting the parking, license plate and tail lamps to illuminate. This input signal is communicated to the IPDM E/R (intelligent power distribution module engine room) via the CAN communication lines. The CPU (central processing unit) located in the IPDM E/R controls the tail lamp relay coil. This relay, when energized, directs power to parking, license plate and tail lamps, which then illuminate.
Power is supplied at all times
- to ignition relay located in IPDM E/R
- to tail lamp relay located in IPDM E/R
- through 15A fuse (No. 52, located in IPDM E/R) and
- through 20A fuse (No. 53, located in IPDM E/R)
- to the CPU located in the IPDM E/R
- through 50A fusible link (letter j, located in fuse and fusible link block)
- to BCM terminal 70
- through 10A fuse [No. 21, located in fuse block (J/B)]
- to BCM terminal 57.
With the ignition switch in the ON or START position, power is supplied
- through 10A fuse [No. 12, located in fuse block (J/B)]
- to BCM terminal 38
- to ignition relay located in IPDM E/R and
- through the ignition relay
- to the CPU of the IPDM E/R.
With the ignition switch in the ACC or ON position, power is supplied
- through 10A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11.
Ground is supplied
- to BCM terminal 67
- through grounds M57 and M61
- to IPDM E/R terminals 59 and 39
- through grounds E9, E15 (all models) and E24 (with MR20DE).
OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position, the BCM receives an input signal requesting parking, license plate and tail lamps to illuminate. This input signal is communicated to the IPDM E/R via the CAN communication lines. The CPU, located in the IPDM E/R, controls the tail lamp relay coil. When energized, the tail lamp relay directs power
- through 10A fuse (No. 37, located in IPDM E/R)
- through IPDM E/R terminal 28
- to front combination lamp LH terminal 1, and
- through IPDM E/R terminal 29
- to front combination lamp RH terminal 1
- through 10A fuse (No. 36, located in IPDM E/R)
- through IPDM E/R terminal 27
- to rear combination lamp LH and RH terminal 1 and
- to license plate lamp LH and RH terminal 1.
Ground is supplied
- to front combination lamp LH and RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE)
- to rear combination lamp LH and RH terminal 4 and
- to license plate lamp LH and RH terminal 2
- through grounds B7 and B19.
With power and ground supplied, parking, license plate and tail lamps illuminate.
Refer to " SYSTEM DESCRIPTION ".
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When room lamp switch is in DOOR position, room lamp ON/OFF is controlled by timer according to signals from switches including key switch, front door switch LH, unlock signal from keyfob, door lock and unlock switch, key cylinder lock and unlock switch, ignition switch.
When room lamp turns ON, there is a gradual brightening over 1 second.
When room lamp turns OFF, there is a gradual dimming over 1 second.
Interior room lamp timer is controlled by BCM (body control module).
Interior room lamp timer control settings can be changed with CONSULT-III.
SWITCH OPERATION
Power is supplied
- through BCM terminal 56
- to trunk room lamp terminal 1
- to vanity mirror lamp LH and RH terminal 1 (with vanity lamps)
- to map lamp terminal 2 (with map lamp) and
- to interior room lamp terminal 2.
When trunk room lamp is ON (trunk is open), ground is supplied
- to trunk room lamp terminal 2
- through BCM terminal 49.
When vanity mirror lamp LH or RH switch is ON (with vanity lamps), ground is supplied
- to vanity mirror lamp LH or RH terminal 2
- through grounds M57 and M61.
When map lamp switch is ON (with map lamp), ground is supplied
- to map lamp terminal 1
- through grounds M57 and M61.
When interior room lamp switch is ON, ground is supplied
- to interior room lamp
- through interior room lamp case ground.
INTERIOR ROOM LAMP TIMER OPERATION
Without Intelligent Key System
When room lamp switch is in DOOR position, and when all conditions below are met, BCM performs timer control (maximum 30 seconds) for room lamp ON/OFF.
In addition, when the interior room lamp turns ON or OFF there is gradual brightening or dimming over 1 second.
Power is supplied
- through 10A fuse [No. 19, located in fuse block (J/B)]
- to key switch terminal 2.
When the key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.
When front door lock assembly LH (key cylinder switch) is unlocked, ground is supplied
- to BCM terminal 7
- through front door key cylinder switch LH terminal 5
- through front door key cylinder switch LH terminal 4
- through grounds M57 and M61.
At the time that front door LH is opened, BCM detects that front door LH is unlocked. It determines that interior room lamp timer operation condition is met, and turns the room lamp ON for 30 seconds.
When key is in ignition key cylinder
Power is supplied
- through key switch terminal 1
- to BCM terminal 37.
When key is removed from key switch (key switch OFF), the power supply to BCM terminal 37 is terminated.
BCM detects that key has been removed, determines that interior room lamp timer conditions are met, and turns the room lamp ON for 30 seconds.
When front door LH opens --> closes, and the key is not inserted in the key switch (key switch OFF), voltage at BCM terminal 47 changes between 0V (door open) --> 12V (door closed). The BCM determines that conditions for room lamp operation are met and turns the room lamp ON for 30 seconds.
Interior room lamp timer control is canceled under the following conditions
- Front door LH is locked (locked front door key cylinder switch LH).
- Front door LH is opened (front door switch LH).
- Ignition switch ON.
With Intelligent Key System
When the room lamp switch is in DOOR position, and when all conditions below are met, BCM performs timer control (maximum 30 second) for room lamp ON/OFF.
In addition, when interior room lamp turns ON or OFF there is gradual brightening or dimming over 1 second.
Power is supplied
- through 10A fuse [No. 9, located in fuse block (J/B)]
- to key switch and ignition knob switch terminals 2 and 4.
When key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.
When the ignition knob switch is released, power will not be supplied to Intelligent Key unit terminal 27.
When front door key cylinder switch LH is unlocked, ground is supplied
- to BCM terminal 7
- through front door key cylinder switch LH terminal 5
- through front door key cylinder switch LH terminal 4
- through grounds M57 and M61.
At the time the front door LH is opened, the BCM detects the front door LH is unlocked. It determines that the interior room lamp timer operation conditions are met, and interior room lamp ON for 30 seconds.
When the key is in ignition key cylinder (key switch ON), or ignition knob switch is pushed, power is supplied
- through key switch and ignition knob switch terminal 1
- to BCM terminal 37, or
- through key switch and ignition knob switch terminal 3
- to Intelligent Key unit terminal 27.
When the key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated.
When the ignition knob switch is released, power supply to intelligent key unit is terminated. The BCM detects that the key has been removed, determines that interior room lamp timer conditions are met, and turns room lamp ON for 30 seconds.
When the front door LH opens --> closes, and key is not inserted in key switch (or ignition knob switch is released), BCM terminal 47 changes between 0V (door open) --> 12V (door closed). BCM determines that conditions for room lamp operation are met, and turns room lamp ON for 30 seconds.
Interior room lamp timer control is canceled under the following conditions
- Front door LH is locked (with keyfob or front door key cylinder switch LH).
- Front door LH is opened (front door switch LH).
- Ignition switch ON.
The control of the illumination lamps operation is dependent upon the position of the lighting switch. When the lighting switch is placed in the 1ST or 2ND position, the BCM (body control module) receives input signal requesting the illumination lamps to illuminate. This input signal is communicated to IPDM E/R (intelligent power distribution module engine room) across CAN communication lines. CPU (central processing unit) located in the IPDM E/R controls the tail lamp relay coil. This relay, when energized, directs power to the illumination lamps, which then illuminate.
Power is supplied at all times
- to ignition relay, located in IPDM E/R
- to tail lamp relay, located in IPDM E/R
- through 15A fuse (No. 52, located in IPDM E/R) and
- through 20A fuse (No. 53, located in IPDM E/R)
- to CPU located in IPDM E/R
- through 50A fusible link (letter j, located in fuse and fusible link box)
- to BCM terminal 70, and
- through 10A fuse [No. 21, located in fuse block (J/B)]
- to BCM terminal 57
- through 10A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 1.
With the ignition switch in the ACC or ON position, power is supplied
- through 10A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11.
With the ignition switch in the ON or START position, power is supplied
- to ignition relay, located in IPDM E/R, and
- through 10A fuse [No. 12, located in fuse block (J/B)]
- to BCM terminal 38
- through 10A fuse [No. 14, located in fuse block (J/B)]
- to combination meter terminal 2.
Ground is supplied
- to BCM terminal 67
- to combination meter terminals 3, 21 and 22 and
- to glove box lamp terminal 2
- through grounds M57 and M61, and
- to IPDM E/R terminals 39 and 59
- through grounds E9, E15 (all models) and E24 (with MR20DE).
ILLUMINATION OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position, BCM receives input signal requesting the illumination lamps to illuminate. This input signal is communicated to IPDM E/R across CAN communication lines. CPU located in the IPDM E/R controls the tail lamp relay coil, which, when energized, directs power
- through 10A fuse (No. 36, located in IPDM E/R)
- through IPDM E/R terminal 27
- to audio unit terminal 9
- to front air control terminal 23
- to hazard switch terminal 3
- to manual mode select switch terminal 4 (with QR25DE)
- to heated seat switches LH and RH terminal 5 (if equipped)
- through resistor 1 terminals 2 and 1
- through combination switch (spiral cable) terminals 34 and 14
- to steering wheel audio control switch (if equipped)
- to ASCD steering switch (if equipped)
- to steering shift switch (if equipped)
- to console lamp center terminal 1
- to CVT shift selector terminal 1 (with CVT)
- to Bluetooth ON indicator terminal 3 (with Bluetooth)
- to double meter terminal 11 (with double meter) and
- to glove box lamp terminal 1 (if equipped).
The illumination control switch controls illumination intensity by varying ground
- through combination meter terminal 13
- to console lamp center terminal 2 and
- to CVT shift selector terminal 2 (with CVT).
- to audio unit terminal 8
- to front air control terminal 24
- to hazard switch terminal 4
- to manual mode select switch terminal 5 (with QR25DE)
- through combination switch (spiral cable) terminals 21 and 27
- to steering wheel audio control switch (if equipped)
- to ASCD steering switch (if equipped) and
- to steering shift switch (if equipped)
- to heated seat switches LH and RH terminal 6 (if equipped)
- through combination meter terminal 33 (with double meter)
- to double meter terminal 12.
With power and ground supplied, illumination lamps illuminate.
Refer to " SYSTEM DESCRIPTION ".
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- Remove glove box assembly. Refer to " «COMPONENT PARTS»(ref-367337-S34389624802010072700000) ".
- Turn bulb socket (1) counterclockwise and remove it.
- Remove the bulb.