Lightning System: Overview Nissan Frontier D40

General precautions for service operations

1. Never work with wet hands.
2. Turn the lighting switch OFF before disconnecting and connecting the connector.
3. When checking the headlamp on/off operation, check it on vehicle and with the power connected to the vehicle-side connector.
4. Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not touch the headlamp bulb just after the headlamp is turned off, because it is very hot.
5. When the bulb has burned out, wrap it in a thick vinyl bag and discard. Do not break the bulb.
6. Leaving the bulb removed from the headlamp housing for a long period of time can deteriorate the performance of the lens and reflector (dirt, clouding). Always prepare a new bulb and have it on hand when replacing the bulb.
7. Do not use organic solvent (paint thinner or gasoline) to clean lamps and to remove old sealant.

Identifying Headlamp Components And Harness Connector Location (For USA). Scheme 1

System Description

Control of the headlamp system operation is dependent upon the position of the combination switch (lighting switch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives input requesting the headlamps (and tail lamps) 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 headlamp high and headlamp low relay coils. When energized, these relays direct power to the respective headlamps, which then illuminate.

Low Beam Operation

With the lighting switch in 2ND position, the BCM receives input requesting the headlamps 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 headlamp low relay coil. When energized, this relay directs power

1. through 15A fuse (No. 41, located in the IPDM E/R)
2. through IPDM E/R terminal 54
3. to front combination lamp RH (headlamp) terminal 3, and
4. through 15A fuse (No. 40, located in the IPDM E/R)
5. through IPDM E/R terminal 52
6. to front combination lamp LH (headlamp) terminal 3.

Ground is supplied

1. to front combination lamp LH and RH (headlamp) terminal 2
2. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

With power and ground supplied, low beam headlamps illuminate.

High Beam Operation/Flash-to-Pass Operation

With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input requesting the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator. The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power

1. through 10A fuse (No. 34, located in the IPDM E/R)
2. through IPDM E/R terminal 56
3. to front combination lamp RH (headlamp) terminal 1, and
4. through 10A fuse (No. 35, located in the IPDM E/R)
5. through IPDM E/R terminal 55
6. to front combination lamp LH (headlamp) terminal 1.

Ground is supplied

1. to front combination lamp LH and RH (headlamp) terminal 2
2. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

With power and ground supplied, the high beam headlamps illuminate.

AUTO LIGHT OPERATION

Refer to " SYSTEM DESCRIPTION ".

CAN Communication System Description

Refer to CAN Communication System in LAN System article .

Headlamp - Schematic Diagram (For USA). Scheme 2

Daytime light system turns on daytime light lamps while driving. Daytime light lamps are not turned on if engine is activated with parking brake on. Take off parking brake to turn on daytime light lamps. The lamps turn off when lighting switch is in the 2ND position or AUTO position (Headlamp is "ON") and when lighting switch is in the PASSING position. (Daytime light lamps are not turned off only by parking brake itself.)

A parking brake signal and engine run or stop signal are sent to BCM (body control module) by CAN communication line.

With the lighting switch in 2ND position, the BCM receives input requesting the headlamps 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 headlamp low relay coil. When energized, this relay directs power

1. through 15A fuse (No. 41, located in the IPDM E/R)
2. through IPDM E/R terminal 54
3. to front combination lamp RH (headlamp) terminal 3, and
4. through 15A fuse (No. 40, located in the IPDM E/R)
5. through IPDM E/R terminal 52
6. to daytime light relay 2 terminals 2 and 5, and
7. through daytime light relay 2 terminal 3
8. to front combination lamp LH (headlamp) terminal 3.

Ground is supplied

1. to front combination lamp RH (headlamp) terminal 2
2. to daytime light relay 1 terminal 4
3. to daytime light relay 2 terminal 1
4. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

When the CPU of the IPDM E/R energizes the headlamp low relay, it de-energizes daytime relay 1. When deenergized, this relay supplies ground

1. to front combination lamp LH (headlamp) terminal 2
2. through daytime light relay 1 terminal 3.

With power and ground supplied, low beam headlamps illuminate.

With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input requesting the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator. The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power

1. through 10A fuse (No. 34, located in the IPDM E/R)
2. through IPDM E/R terminal 56
3. to front combination lamp RH (headlamp) terminal 1, and
4. through 10A fuse (No. 35, located in the IPDM E/R)
5. through IPDM E/R terminal 55
6. to front combination lamp LH (headlamp) terminal 1.

Ground is supplied

1. to front combination lamp RH (headlamp) terminal 2, and
2. to daytime light relay 1 terminal 4, and
3. to daytime light relay 2 terminal 1
4. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

When the CPU of the IPDM E/R energizes the headlamp high relay, it de-energizes daytime relay 1. When deenergized, this relay supplies ground

1. to front combination lamp LH (headlamp) terminal 2
2. through daytime light relay 1 terminal 3.

With power and ground supplied, the high beam headlamps illuminate.

DAYTIME LIGHT OPERATION

With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, the IPDM E/R receives input requesting the daytime lights illuminate. This input is communicated across the CAN communication lines. The CPU of the IPDM E/R controls daytime light relay 1 which supplies ground

1. to daytime light relay 1 terminal 1
2. through IPDM E/R terminal 44.

When energized, daytime light relay 1 directs power

1. through daytime light relay 1 terminal 3
2. through front combination lamp LH (headlamp) terminal 2
3. through front combination lamp LH (headlamp) terminal 1
4. through IPDM E/R terminal 55
5. through 10A fuse (No. 35, located in the IPDM E/R)
6. through 10A fuse (No. 34, located in the IPDM E/R)
7. through IPDM E/R terminal 56
8. to front combination lamp RH (headlamp) terminal 1.

Ground is supplied

1. to front combination lamp RH (headlamp) terminal 2
2. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

With power and ground supplied, the daytime lights illuminate. The high beam headlamps are now wired in series and illuminate at a reduced intensity.

For auto light operation, refer to " SYSTEM DESCRIPTION ".

Refer to CAN Communication System in LAN System article .

Headlamp - Schematic Diagram (For Canada). Scheme 3

Automatically turns on/off the parking lamps and the headlamps in accordance with ambient light. Timing for when the lamps turn on/off can be selected using four modes.

Refer to CAN Communication System in LAN System article .

Control of the fog lamps is dependent upon the position of the combination switch (lighting switch). The lighting switch must be in the 2ND position or AUTO position (LOW beam is ON) for front fog lamp operation. When the lighting switch is placed in the fog lamp position, the BCM (body control module) receives input signal requesting the fog lamps to illuminate. When the headlamps are illuminated, this input signal 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 front fog lamp relay coil. When activated, this relay directs power to the front fog lamps.

FOG LAMP OPERATION

The fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position or AUTO position (LOW beam is ON) and the fog lamp switch must be ON for fog lamp operation.

With the fog lamp switch in the ON position, the CPU of the IPDM E/R grounds the coil side of the fog lamp relay. The fog lamp relay then directs power

1. through 20A fuse (No. 56, located in the IPDM E/R)
2. through IPDM E/R terminal 50
3. to front fog lamp LH terminal 1, and
4. through IPDM E/R terminal 51
5. to front fog lamp RH terminal 1.

Ground is supplied

1. to front fog lamp LH and RH terminal 2
2. through grounds E9, E15 and E24.

With power and ground supplied, the front fog lamps illuminate.

Refer to CAN Communication System in LAN System article .

TURN SIGNAL OPERATION

When the ignition switch is in the ON or START position, power is supplied

1. through 10A fuse [No. 1, located in the fuse block (J/B)]
2. to BCM terminal 38, and
3. through 10A fuse [No. 14, located in the fuse block (J/B)]
4. to combination meter terminal 16.

Ground is supplied

1. to BCM terminal 67 and
2. to combination meter terminals 13 and 23
3. through grounds M57, M61 and M79.

HAZARD LAMP OPERATION

Power is supplied at all times

1. through 50A fusible link (letter g, located in the fuse and fusible link box)
2. to BCM terminal 70, and
3. through 10A fuse [No. 19, located in the fuse block (J/B)]
4. to combination meter terminal 3.

Ground is supplied

1. to BCM terminal 67 and
2. to combination meter terminals 13 and 23
3. through grounds M57, M61 and M79.

When the hazard switch is depressed, ground is supplied

1. to BCM terminal 29
2. through hazard switch terminal 2
3. through hazard switch terminal 1
4. through grounds M57, M61 and M79.

When the hazard switch is depressed, the BCM, interpreting it as turn signal is ON, outputs turn signal from BCM terminals 60 and 61.

The BCM supplies power

1. through BCM terminals 60 and 61
2. to front combination lamp LH and RH (turn signal) terminal 6
3. through front combination lamp LH and RH (turn signal) terminal 5, and
4. to rear combination lamp LH and RH (turn signal) terminal 4
5. through rear combination lamp LH and RH (turn signal) terminal 5
6. to grounds E9, E15 (all) and E24 (VQ40DE engine only).

BCM sends signal to combination meter through CAN communication lines and turns on turn signal indicator lamps within combination meter.

REMOTE KEYLESS ENTRY SYSTEM OPERATION

Power is supplied at all times

1. through 50A fusible link (letter g, located in the fuse and fusible link box)
2. to BCM terminal 70, and
3. through 10A fuse [No. 19, located in the fuse block (J/B)]
4. to combination meter terminal 3.

Ground is supplied

1. to BCM terminal 67 and
2. to combination meter terminals 13 and 23
3. through grounds M57, M61 and M79.

When the remote keyless entry system is triggered by input from the keyfob, the BCM, interpreting it as turn signal is ON, outputs turn signal from BCM terminals 60 and 61.

The BCM supplies power

1. through BCM terminals 60 and 61
2. to front combination lamp LH and RH (turn signal) terminal 6
3. through front combination lamp LH and RH (turn signal) terminal 5, and
4. to rear combination lamp LH and RH (turn signal) terminal 4
5. through rear combination lamp LH and RH (turn signal) terminal 5
6. to grounds E9, E15 (all) and E24 (VQ40DE engine only).

BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator lamps within combination meter.

With power and input supplied, the BCM controls the flashing of the hazard warning lamps when keyfob is used to activate the remote keyless entry system.

Refer to CAN Communication System in LAN System article .

Power is supplied at all times

1. through 10A fuse [No. 20, located in fuse block (J/B)]
2. to stop lamp switch terminal 1, and
3. to stop lamp relay terminals 1 and 3 (with VDC).

When the brake pedal is pressed, the stop lamp switch is closed and power is supplied

1. through stop lamp switch terminal 2
2. to rear combination lamp LH and RH (stop) terminal 1
3. to high-mounted stop lamp terminal 1
4. to ABS actuator and electric unit (control unit) terminal 41, and
5. to stop lamp relay terminal 5 (with VDC).

Ground is supplied

1. to rear combination lamp LH and RH (stop) terminal 2
2. through grounds E9, E15 (all) and E24 (VQ40DE engine only), and
3. to high-mounted stop lamp terminal 2
4. through grounds B117 and B132.

With power and ground supplied, the stop lamps illuminate.

Control of the parking, license plate, and tail lamp operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1ST position, the BCM (body control module) receives input signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input signal 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. This relay, when energized, directs power to the parking, license plate and tail lamps, which then illuminate.

Power is supplied at all times

1. to tail lamp relay, located in the IPDM E/R, and
2. through 20A fuse (No. 53, located in the IPDM E/R)
3. to CPU of the IPDM E/R, and
4. to ignition relay, located in the IPDM E/R, and
5. through 50A fusible link (letter g, located in the fuse and fusible link box)
6. to BCM terminal 70.

With the ignition switch in the ON or START position, power is supplied

1. to ignition relay, located in the IPDM E/R, and
2. through 10A fuse [No. 1, located in the fuse block (J/B)]
3. to BCM terminal 38.

Ground is supplied

1. to BCM terminal 67
2. through grounds M57, M61 and M79, and
3. to IPDM E/R terminals 38 and 59
4. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

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 signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input signal 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

1. through 10A fuse (No. 37, located in the IPDM E/R)
2. through IPDM E/R terminal 57
3. to license plate lamp LH and RH terminal 1
4. to rear combination lamp LH and RH (tail) terminal 3, and
5. through 10A fuse (No. 36, located in the IPDM E/R)
6. through IPDM E/R terminal 28
7. to front combination lamp LH (side marker) terminal 7
8. to front combination lamp LH (parking) terminal 4, and
9. through IPDM E/R terminal 49
10. to front combination lamp RH (side marker) terminal 7
11. to front combination lamp RH (parking) terminal 4.

Ground is supplied

1. to front combination lamp LH and RH (side marker) terminal 8
2. to front combination lamp LH and RH (parking) terminal 5
3. to license plate lamp LH and RH terminal 2
4. to rear combination lamp LH and RH (tail) terminal 2
5. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

With power and ground supplied, the parking, side marker, license plate and tail lamps illuminate.

Refer to CAN Communication System in LAN System article .

Parking, License Plate And Tail Lamp - Schematic Diagram. Scheme 4

Power is supplied at all times

1. to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room), and
2. to tail lamp relay, located in the IPDM E/R, and
3. through 50A fusible link (letter g, located in the fuse and fusible link box)
4. to BCM (body control module) terminal 70, and
5. to 15A fuse (No. 60, located in the fuse and relay box)
6. to trailer turn relay RH and LH terminal 5, and
7. through 20A fuse (No. 53, located in the IPDM E/R)
8. to CPU of the IPDM E/R, and
9. through 10A fuse (No. 32, located in the IPDM E/R)
10. to IPDM E/R terminal 61
11. to trailer tow relay 1 terminal 3, and
12. through 30A fusible link (letter m, located in the fuse and fusible link box)
13. to trailer tow relay 2 terminals 3 and 6, and
14. through 30A fusible link (letter h, located in the fuse and fusible link box)
15. to electric brake (pre-wiring) terminal 5.

With the ignition switch in the ON or START position, power is supplied

1. to ignition relay, located in the IPDM E/R, and
2. through 10A fuse [No. 1, located in the fuse block (J/B)]
3. to BCM terminal 38, and
4. through 10A fuse (No. 38, located in the IPDM E/R)
5. to IPDM E/R terminal 27
6. to trailer tow relay 2 terminal 1, and
7. to back-up lamp relay terminal 3 (with M/T).

Ground is supplied

1. to BCM terminal 67 and
2. to electric brake (pre-wiring) terminal 1
3. through grounds M57, M61 and M79, and
4. to IPDM E/R terminals 38 and 59
5. to trailer tow relay 1 terminal 2
6. to trailer tow relay 2 terminal 2
7. to trailer connector terminal 2
8. to trailer turn relay RH and LH terminal 2, and
9. to back-up lamps relay terminal 1 (with M/T)
10. through grounds E9, E15 and E24.

TRAILER TAIL LAMP OPERATION

The trailer tail lamps are controlled by the trailer tow relay 1.

With the lighting switch in the parking and tail lamp ON (1ST) position, AUTO position (and the auto light system is activated) or headlamp ON (2ND) position, power is supplied from the tail lamp relay

1. through 10A fuse (No. 37, located in the IPDM E/R)
2. through IPDM E/R terminal 29
3. to trailer tow relay 1 terminal 1.

When energized, power is supplied

1. through trailer tow relay 1 terminal 5
2. to trailer connector terminal 4.

TRAILER STOP, TURN SIGNAL AND HAZARD LAMP OPERATION

The trailer stop, turn signal and hazard lamps are controlled by the BCM. If either turn signal or the hazard lamps are turned on, the BCM supplies voltage to the trailer turn relay RH or LH to make them flash. If the BCM receives stop lamp switch signal, the BCM supplies voltage to the trailer turn relay RH and LH to make them illuminate.

Left stop, turn signal and hazard lamp output is supplied

1. through BCM terminal 52
2. to trailer turn relay LH terminal 1

When energized, trailer turn relay LH supplies power to the left stop, turn signal, and hazard lamp

1. through trailer turn relay LH terminal 3
2. to trailer connector terminal 3.

Right stop, turn signal and hazard lamp output is supplied

1. through BCM terminal 51
2. to trailer turn relay RH terminal 1

When energized, trailer turn relay RH supplies power to the right stop, turn signal, and hazard lamp

1. through trailer turn relay RH terminal 3
2. to trailer connector terminal 6.

TRAILER POWER SUPPLY OPERATION

The trailer power supply is controlled by trailer tow relay 2.

When the ignition switch is in the ON or START position, power is supplied

1. through 10A fuse (No. 38, located in the IPDM E/R)
2. through IPDM E/R terminal 27
3. to trailer tow relay 2 terminal 1.

When energized, trailer tow relay 2 power is supplied

1. through trailer tow relay 2 terminals 5 and 7
2. to trailer connector terminal 5.

TRAILER BACK-UP LAMPS OPERATION

The trailer back-up lamps are controlled by back-up lamp relay.

When the ignition switch is in the ON or START position, power is supplied

1. through 10A fuse (No. 38, located in the IPDM E/R)
2. through IPDM E/R terminal 27
3. to back-up lamp relay terminal 3 (with M/T) or 7 (with A/T).

When energized, back-up lamp relay power is supplied

1. through back-up lamp relay terminal 5 (with M/T) or 6 (with A/T)
2. to trailer connector terminal 7.

Trailer Tow - Schematic Diagram. Scheme 5

Switch Operation

When the cargo lamp switch is ON, ground is supplied

1. to BCM terminal 31
2. through cargo lamp switch terminal 1
3. through cargo lamp switch terminal 3
4. through grounds M57, M61 and M79, and
5. to cargo lamp relay terminal 1
6. through BCM terminal 50.

Power is supplied

1. through 10A fuse [No. 18, located in the fuse block (J/B)]
2. to cargo lamp relay terminals 2 and 5.

When the BCM supplies ground to terminal 50, the cargo lamp relay energizes. When this relay is energized

power is supplied

1. to high mounted stop lamp (cargo lamp) terminal 3
2. through cargo lamp relay terminal 3.

Ground is supplied

1. to high mounted stop lamp (cargo lamp) terminal 2
2. through grounds B117 and B132.

With power and ground supplied, the cargo lamp illuminates.

When any door switch is ON (door is opened), ground is supplied

1. to front room/map lamp assembly terminal 2 (with front map lamps)
2. to room lamp 2nd row terminal 1
3. to ignition keyhole illumination terminal 2
4. through diode 6 terminal 2 (front door switch LH only)
5. through diode 6 terminal 1 (front door switch LH only)
6. through door switch terminal 1
7. through front door switch LH or RH terminal 3 (king cab)
8. through grounds B7 and B19 LH or B117 and B132 RH (king cab), or
9. through case ground of any door switch (crew cab).

When the front door LH is open, ground is supplied

1. to ignition keyhole illumination terminal 2
2. through front door switch terminal 1
3. through front door switch terminal 3 (king cab)
4. through grounds B7 and B19 (king cab), or
5. through case ground of the front door switch LH (crew cab).

Power is supplied

1. through 10A fuse [No. 18, located in the fuse block (J/B)]
2. to front room/map lamp assembly terminal 1 (with front map lamps)
3. to room lamp 2nd row terminal 2, and
4. to ignition keyhole illumination terminal 1.

When room lamp 2nd row is ON, ground is supplied through room lamp 2nd row case ground.

When front room/map lamp assembly switch is ON, ground is supplied

1. to front room/map lamp assembly terminal 3
2. through grounds M57, M61 and M79.

When the cargo lamp switch is ON, ground is supplied

1. to BCM terminal 31
2. through cargo lamp switch terminal 1
3. through cargo lamp switch terminal 3
4. through grounds M57, M61 and M79, and
5. to cargo lamp relay terminal 1
6. through BCM terminal 50.

Power is supplied

1. through 10A fuse [No. 18, located in the fuse block (J/B)]
2. to cargo lamp relay terminals 2 and 5.

When the BCM supplies ground to terminal 50, the cargo lamp relay energizes. When this relay is energized, power is supplied

1. to high mounted stop lamp (cargo lamp) terminal 3
2. through cargo lamp relay terminal 3.

Ground is supplied

1. to high mounted stop lamp (cargo lamp) terminal 2
2. through grounds B117 and B132.

With power and ground supplied, the cargo lamp illuminates.

When any door switch is ON (door is opened), ground is supplied

1. to front room/map lamp assembly terminal 2
2. to room lamp 2nd row terminal 1
3. through BCM terminal 63, and
4. to ignition keyhole illumination terminal 2
5. through BCM terminal 1.

Power is supplied

1. through BCM terminal 56
2. to ignition keyhole illumination terminal 1
3. to front room/map lamp assembly terminal 1 (with front map lamps)
4. to vanity lamp LH and RH terminal 1 (with vanity lamps), and
5. to room lamp 2nd row terminal 2.

When front room/map lamp assembly switch is ON, ground is supplied

1. through front room/map lamp assembly terminal 3
2. to grounds M57, M61 and M79.

When vanity lamp LH or RH is ON, ground is supplied

1. to vanity lamp LH or RH terminal 2
2. through grounds B7 and B19.

When room lamp 2nd row is ON, ground is supplied through room lamp case ground.

With power and ground supplied, the lamps illuminate.

Room Lamp Timer Operation

When lamp switch is in DOOR position, and when all conditions below are met, BCM performs timer control (maximum 30 seconds) for interior room lamp and map lamp ON/OFF.

Power is supplied

1. through 10A fuse [No. 25, located in the fuse block (J/B)]
2. to key switch terminal 2.

Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.

Ground is supplied

1. to BCM terminal 46
2. through main power window and door lock/unlock switch terminal 11.

At the time that front door LH is opened, BCM detects that front door LH is unlocked. It determines that interior room lamp and map lamp timer operation conditions are met, and turns the interior room lamps ON for 30 seconds.

Key is in ignition key cylinder (key switch ON), power is supplied

1. through key switch terminal 1
2. to BCM terminal 37.

When key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated. BCM detects that key has been removed, determines that interior room lamp and map lamp timer conditions are met, and turns the interior room lamps ON for 30 seconds.

When front door LH opens --> closes, and the key is not inserted in the key switch (key switch OFF), BCM terminal 47 changes between 0V (door open) --> 12V (door closed). The BCM determines that conditions for interior room lamp operation are met and turns the interior room lamp ON for 30 seconds.

Timer control is canceled under the following conditions.

1. Front door LH is locked [when locked by keyfob (if equipped), main power window and door lock/unlock switch, or front door lock assembly LH (key cylinder switch)]
2. Front door LH is opened (front door switch LH turns ON)
3. Ignition switch ON.

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 signal requesting the illumination lamps to illuminate. This input signal 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. This relay, when energized, directs power to the illumination lamps, which then illuminate.

Power is supplied at all times

1. to ignition relay, located in the IPDM E/R, and
2. to tail lamp relay, located in the IPDM E/R, and
3. through 50A fusible link (letter g, located in the fuse and fusible link box)
4. to BCM terminal 70, and
5. through 20A fuse (No. 53, located in the IPDM E/R)
6. to CPU of the IPDM E/R, and
7. through 10A fuse [No.19, located in the fuse block (J/B)]
8. to combination meter terminal 3.

With the ignition switch in the ON or START position, power is supplied

1. to ignition relay, located in the IPDM E/R, and
2. through 10A fuse [No. 1, located in the fuse block (J/B)]
3. to BCM terminal 38.

Ground is supplied

1. to BCM terminal 67 and
2. to combination meter terminals 13 and 23
3. through grounds M57, M61 and M79, and
4. to IPDM E/R terminals 38 and 59
5. through grounds E9, E15 (all) and E24 (VQ40DE engine only).

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 signal requesting the illumination lamps to illuminate. This input signal 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

1. through 10A fuse (No. 37, located in the IPDM E/R)
2. through IPDM E/R terminal 57
3. to door mirror remote control switch terminal 16 (with power outside mirrors)
4. to hazard switch terminal 3
5. to audio unit terminal 8 (with audio unit)
6. to 4WD shift switch terminal 7 (with 4-wheel drive)
7. to front air control terminal 8
8. to clutch interlock cancel switch terminal 5 (with clutch interlock cancel switch)
9. to cargo lamp switch terminal 4
10. to differential lock switch terminal 4 (with electronic locking rear differential)
11. to electric brake (pre-wiring) terminal 4
12. to A/T device terminal 3 (with A/T)
13. to front heated seat switch LH and RH terminal 5 (with heated seats)
14. to VDC OFF switch terminal 3 (with VDC)
15. to HDC switch terminal 5 (with VDC).

Illumination is controlled

1. through combination meter terminal 22
2. to door mirror remote control switch terminal 15 (with power outside mirrors)
3. to hazard switch terminal 4
4. to audio unit terminal 7 (with audio unit)
5. to 4WD switch terminal 8 (with 4-wheel drive)
6. to front air control terminal 9
7. to clutch interlock cancel switch terminal 6 (with clutch interlock cancel switch)
8. to cargo lamp switch terminal 2
9. to differential lock switch terminal 5 (with electronic locking rear differential)
10. to A/T device terminal 5 (with A/T)
11. to front heated seat switch LH and RH terminal 6 (with heated seats)
12. to VDC OFF switch terminal 4 (with VDC)
13. to HDC switch terminal 6 (with VDC).

Ground is supplied

1. to electric brake (pre-wiring) terminal 1
2. through grounds M57, M61 and M79.

With power and ground supplied, illumination lamps illuminate.

Refer to CAN Communication System in LAN System article .

Illumination - Schematic Diagram (1 Of 3). Scheme 6

Illumination - Schematic Diagram (2 Of 3). Scheme 7

Illumination - Schematic Diagram (3 Of 3). Scheme 8