Lighting Systems: Overview Suzuki Equator I

General precautions for service operations: Exterior Lighting System

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.

General precautions for service operations: Interior Lighting System

1. When removing or disassembling any part, be careful not to damage or deform it. Protect parts which may get in the way with cloth.
2. When removing parts with a screw driver or other tool, protect parts by wrapping them with vinyl or tape.
3. Keep removed parts protected with cloth.
4. If an non-reusable part is removed, replace it with a new one.
5. After re-assembly has been completed, make sure each part functions correctly.
6. Never work with wet hands.
7. Turn the lighting switch OFF before disconnecting and connecting the connector.
8. Do not use organic solvent (paint thinner or gasoline) to clean lamps or remove sealant residue.

Headlamp: System Description

Control of the headlamp system operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 2nd position, the BCM (body control module) receives input requesting the headlamps and park lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via 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.

HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION

With the lighting switch in the 2ND position and placed in HIGH position, the BCM receives input 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 is communicated to the IPDM E/R via the CAN communication lines. The CPU of the combination meter controls the ON/OFF status off the HIGH BEAM indicator. The CPU of the IPDM E/R controls the headlamp high relay coil which supplies power to the high beam headlamps.

The combination meter receives a high beam request signal (ON) via the CAN communication lines and turns the high beam indicator lamp ON.

Headlamp: Component Description

PART DESCRIPTION

Daytime Running Light System: System Description

The headlamp system for Canada vehicles is equipped with a daytime light control that activates the high beam headlamps at approximately half illumination whenever the engine is operating. If the parking brake is applied before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate once the parking brake is released. Thereafter, the daytime lights will continue to operate when the parking brake is applied.

OPERATION

The BCM monitors inputs from the parking brake switch and the combination switch to determine when to activate the daytime light system. The BCM sends a daytime light request to the IPDM E/R via the CAN communication lines. The IPDM E/R grounds the daytime light relay which in turn, provides power to the ground side of the LH high beam lamp. Power flows backward through the LH high beam lamp to the IPDM E/R, through the high beam fuses, through the RH high beam lamp circuit to the RH high beam lamp and on to ground. The high beam lamps are wired in series which causes them to illuminate at a reduced intensity.

Daytime Running Light System: Component Description

PART DESCRIPTION

Auto Light System: System Description

The auto light control system has an optical sensor that detects outside brightness. When the lighting switch is in AUTO position, it automatically turns ON/OFF the parking, license plate, tail and headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details, refer to [ SDT FUNCTION (BCM - HEAD LAMP) ].

AUTO LIGHT OPERATION

The auto light system operates the low beam and high beam headlamps, parking lamps, tail lamps and license plate lamps. The BCM monitors the lighting switch (combination switch) position as a part of the BCM combination switch reading function. When the lighting switch is in the AUTO position, the BCM automatically turns the lamps ON/OFF according to ambient light brightness. When the key is turned OFF and all doors are closed, the auto light system keeps the headlamps ON for 45 seconds.

Note. Timing for when lamps turn ON/OFF can be changed by the function setting of SDT. Refer to [ SDT FUNCTION (BCM - HEAD LAMP) ].

Auto Light System: Component Description

PART DESCRIPTION

Front Fog Lamp: System Description

The front fog lamps are activated with the lighting switch (combination switch). The lighting switch signal to the BCM is monitored with the BCM combination switch reading function. When the fog lamps are turned ON with the lighting switch, the BCM sends a front fog lamp request signal via CAN communication lines to the IPDM E/R. The IPDM E/R grounds the front fog lamp relay coil to activate the front fog lamps.

FRONT FOG LAMP OPERATION

When the lighting switch is in front fog lamp ON position and also in 1ST or 2ND position or AUTO (if equipped) position (headlamp is ON), the BCM detects FR FOG ON and the HEAD LAMP1 or 2 ON. The BCM sends a front fog lamp request ON signal via the CAN communication lines to the IPDM E/R. The IPDM E/R then turns ON the front fog lamp relay sending power to the front fog lamps.

Front Fog Lamp: Component Description

PART DESCRIPTION

TURN SIGNAL OPERATION

When the turn signal switch is in LH or RH position with the ignition switch in ON position, the BCM detects the TURN RH or TURN LH ON request. The BCM outputs the flasher signal to the respective turn signal lamp. The BCM also sends a turn indicator signal ON request via the CAN communication lines to the combination meter. The combination meter then activates the appropriate turn signal indicator and audible buzzer.

HAZARD LAMP OPERATION

When the hazard switch is in ON position, the BCM detects the hazard switch signal ON. The BCM outputs the flasher signal (right and left). The BCM sends a hazard indicator signal ON request via the CAN communication lines to the combination meter. The combination meter then activates the hazard indicator and audible buzzer.

Turn Signal and Hazard Warning Lamps: Component Description

PART DESCRIPTION

PARKING, LICENSE PLATE AND TAIL LAMPS OPERATION

When the lighting switch is in 1ST position, BCM detects the LIGHTING SWITCH 1ST POSITION ON. The BCM sends a parking light ON request via the CAN communication lines to the IPDM E/R. The IPDM E/R then activates the tail lamp relay which sends power to the parking and instrument illumination circuits.

Parking, License Plate and Tail Lamps: Component Description

PART DESCRIPTION

Trailer Tail Lamp Operation

The trailer tail lamps are controlled by the trailer tow relay 1 located in the IPDM E/R. With the combination switch (lighting and turn signal switch) in the 1st position, the BCM detects the LIGHTING SWITCH 1ST POSITION ON. The BCM sends a parking light ON request via the CAN communication lines to the IPDM E/R. The IPDM E/R then activates the tail lamp relay which activates the trailer tow relay 1 and sends power to the trailer connector.

Trailer Turn Signal Lamp Operation

The trailer turn signal lamps are controlled by the BCM. When the combination switch (lighting and turn signal switch) is in the LH or RH position with the ignition switch ON, the combination switch (lighting and turn signal switch) sends a signal to the BCM. The BCM detects the TURN RH or TURN LH ON request. The BCM sends a control signal to the respective trailer turn relay which sends power to the trailer connector.

Trailer Hazard Lamp Operation

The trailer hazard lamps are controlled by the BCM. When the hazard switch is pressed, the BCM detects the hazard ON request. The BCM then sends a control signal to both trailer turn relays which sends power to the trailer connector.

Trailer Brake Lamp Operation

The trailer brake lamps are controlled by the BCM. When the brake pedal is depressed, the combination meter receives a stop lamp switch signal from the stop lamp switch. The combination meter then sends the brake signal to the BCM via the CAN communication lines. The BCM then sends a control signal to both trailer turn relays which sends power to the trailer connector.

Trailer Tow: Component Description

Operation Example

In the following operation example, the combination of the status signals of the combination switch is replaced as follows: INPUT 1 - 5 to "1 - 5" and OUTPUT 1 - 5 to "A - E".

Example 1: When a switch (TURN RH switch) is turned ON

Scheme 1

1. The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
2. BCM detects the combination switch status signal "1E" when the signal of OUTPUT 5 is input to INPUT 1.
3. BCM judges that the TURN RH switch is ON when the signal "1E" is detected.

Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON

Scheme 2

1. The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the TURN RH switch and FR WIPER LOW switch are turned ON.
2. BCM detects the combination switch status signal "1CE" when the signals of OUTPUT 3 and OUTPUT 5 are input to INPUT 1.
3. BCM judges that the TURN RH switch and FR WIPER LOW switch are ON when the signal "1CE" is detected.

WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2 and 3 switches.

WIPER INTERMITTENT DIAL POSITION CHART

ROOM LAMP TIMER OPERATION

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

1. When the front door LH is unlocked [with main power window and door lock/unlock switch, or front door lock assembly (key cylinder switch)].
2. When a door opens --> closes.

Timer control is cancelled under the following conditions.

1. When the front door LH is locked [with main power window and door lock/unlock switch, or front door lock assembly (key cylinder switch)].
2. A door is opened (door switch turns ON).

Interior lamp operational settings can be changed with the function setting of SDT.

Interior Room Lamp Control System: Component Description [With Power Door Locks]

PART DESCRIPTION

Interior Room Lamp Control System: Component Description [Without Power Door Locks]

PART DESCRIPTION

Illumination Control System: System Description [With Power Door Locks]

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 the BCM (body control module) receives input requesting the parking lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via 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 parking and illumination lamps, which then illuminate.

Illumination Control System: Component Description [With Power Door Locks]

PART DESCRIPTION

Illumination Control System: System Description [Without Power Door Locks]

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 the BCM (body control module) receives input requesting the parking lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via 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 parking and illumination lamps, which then illuminate.

Illumination Control System: Component Description [Without Power Door Locks]

PART DESCRIPTION

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Description

In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.

1. Oil pressure low warning indicator
2. Oil pressure gauge (if equipped)
3. Rear window defogger
4. Front wipers
5. Tail, license and parking lamps
6. Front fog lamps (if equipped)
7. Headlamps (Hi, Lo)
8. A/C compressor (magnetic clutch) (if equipped)
9. Cooling fan

Operation Procedure

1. Close the hood and front door RH, and lift the wiper arms from the windshield (to prevent windshield damage due to wiper operation). NOTE: When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the ignition switch OFF.
4. Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test starts.
5. After a series of the following operations is repeated 3 times, auto active test is completed. NOTE: When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF. CAUTION: If auto active test mode cannot be actuated, check door switch system. Refer to [ «DOOR SWITCH CIRCUIT CHECK [KING CAB]»(ref-375732-S02479443662010102800000) ] or [ «DOOR SWITCH CIRCUIT CHECK [CREW CAB]»(ref-375732-S38738860672010102800000) ]. Do not start the engine.

The IPDM E/R (intelligent power distribution module engine room) controls the headlamp high relay based on inputs from the BCM via the CAN communication lines. When the headlamp high relay is energized, power flows through fuses 34 and 35, located in the IPDM E/R. Power then flows to the front combination lamps to the headlamp high beam.

The IPDM E/R (intelligent power distribution module engine room) controls the headlamp low relay based on inputs from the BCM via the CAN communication lines. When the headlamp low relay is energized, power flows through fuses 40 and 41, located in the IPDM E/R. Power then flows to the front combination lamps to the headlamp low beam.

The IPDM E/R (intelligent power distribution module engine room) controls the front fog lamp relay based on inputs from the BCM via the CAN communication lines. When the front fog lamp relay is energized, power flows from the front fog lamp relay in the IPDM E/R to the front fog lamps.

The IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay based on inputs from the BCM via the CAN communication lines. When the tail lamp relay is energized, power flows through fuse 37, located in the IPDM E/R. Power then flows to the front and rear combination lamps.

The BCM monitors inputs from the combination switch to determine when to activate the turn signals. The BCM outputs voltage direction to the left and right turn signals during turn signal operation or both during hazard warning operation. The BCM sends a turn signal indicator request to the combination meter via the CAN communication lines. The BCM performs the fast flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is open.

Note. Turn signal lamp blinks at normal speed when using the hazard warning lamp.

Provides the battery saver output/power supply. Also cuts the power supply when the interior room lamp battery saver is activating.

Controls the following interior room lamps (ground side) by PWM signal

1. Front room/map lamp assembly (if equipped)
2. Room lamp 2nd row NOTE: PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).

Controls the cargo lamp relay coil (ground side) to turn the cargo lamp ON and OFF.

Controls the cargo lamp relay coil (ground side) to turn the cargo lamp ON and OFF.

Controls the ignition keyhole illumination (ground side) to turn the ignition keyhole illumination ON and OFF.

The headlamps (both sides) do not switch to high beam when the lighting switch is in the HI or PASS setting.

The headlamps (both sides) do not turn ON in any lighting switch setting.

The parking, license plate and tail lamps do not turn ON in with any lighting switch setting.

The front fog lamps do not turn ON in any combination switch (lighting and turn signal switch) setting. he front fog lamps do not turn ON in any setting.