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Simplified Wiring System (Sws) - Except Evolution: Overview Mitsubishi Lancer IX

Communication Devices ~5525 words

Windshield Low-Speed (And High-Speed) Wiper Operation

Note. The windshield wiper speed is changed by wiper speed control relay incorporated in front-ECU. When the wiper speed control relay is at "ON" position, the windshield wiper operates at high-speed, and the wiper speed control relay is at "OFF" position, the windshield wiper operates at low-speed.

  1. If the windshield low-speed wiper switch is turned to the ON position with the ignition switch at the "ACC" or "ON" position, the column switch sends a low-speed wiper ON and high-speed wiper OFF signals to the front-ECU. This turns the wiper signal on and the wiper speed control relay off (low-speed), causing the wipers to operate at low-speed.
  2. If the windshield high-speed wiper switch is turned to the ON position, the column switch sends a low-speed wiper OFF and high-speed wiper ON signals to the front-ECU. This turns both the wiper signal and the wiper speed switching relay on (high-speed), causing the wipers to operate at high-speed.

Windshield Intermittent Wiper Operation

The ETACS-ECU calculates the wiper operation interval according to the voltage signal sent from the column switch. Then the ETACS-ECU sends a signal to the front-ECU. The front-ECU determines the wiper operation interval and turns on the wiper relay signal relay. This causes the wiper auto stop relay to turn on. Then the wiper auto stop relay will turn off after the wipers reach the park position. This causes the wiper signal relay and then the wipers to turn off. If the wiper signal relay remains off for the wiper operation interval, the relay turns on again, causing the wipers to operate in intermittent mode.

Windshield Mist Operation

  1. If the windshield mist wiper switch is turned to the ON position with the ignition switch at the "ACC" or "ON" position, the mist wiper high-speed operation signal is sent to the front-ECU. This signal turns on the wiper speed switching relay, causing the wipers to work at high-speed while the mist switch is on.
  2. While the windshield mist wiper switch remains turned on when the intermittent mode is still working, the wipers work as the mist wiper. However, the wipers return to the intermittent mode again when the switch is changed back to "INT" position.
  3. To prevent the windshield mist wiper from operating when the windshield wiper switch is turned OFF, the windshield mist wiper does not work for 0.5 second after the windshield intermittent wiper switch, the windshield low-speed wiper switch and the windshield high-speed wiper switch are turned OFF.

Windshield Washer Operation

  1. If the windshield washer switch is turned to ON position with the ignition switch at "ACC" or "ON" position, the windshield washer ON signal is sent to the front-ECU, causing the windshield wiper signal to turn on after 0.3 second. After the windshield washer switch signal turns off, the windshield wiper signal turns off in 3 seconds.
  2. If the windshield washer switch is turned on while the windshield wiper is at intermittent mode, when the windshield washer switch is turned OFF within 0.2 second, the wiper works only once to perform mist operation by the windshield washer switch. When the ON condition of the windshield washer switch continues more than 0.2 second, the wiper performs the same movement as normal condition from the time when 0.2 second has elapsed and then returns to the intermittent motion.

Rear Wiper Operation

If the rear wiper and washer switch is turned to "INT" position with the ignition switch at "ACC" or "ON" position, the ETACS-ECU turns ON the rear wiper drive signal for 3 seconds (approximately 2 cycles), then 7.4 seconds later the intermittent motion operates every 8 seconds. If the selector lever is moved to the "R" position when the rear wiper and washer switch is turned to the "INT" position and the ignition switch is at the "ACC" or "ON" position, the Park/Neutral position switch "R" turns ON. One second later, the ETACS-ECU turns ON the rear wiper drive signal for 3 seconds (approximately 2 cycles). Then, 7.4 seconds later, the intermittent motion of 8 seconds' cycle is restored.

Rear Washer Operation

If the rear wiper and washer switch is turned to the ON (washer) position with the ignition switch at the "ACC" or "ON" position, the rear washer ON signal is sent to the ETACS-ECU, causing the rear wiper signal to turn on after 0.3 second. After the rear washer switch signal turns off, the rear wiper signal turns off in 3 seconds. If the rear washer switch is turned to the ON position while the rear wiper is in intermittent mode, the rear washer works for that period when the washer switch remains on. Then the rear wipers return to the intermittent mode.

Operation Of Interior Light Automatic Shutoff Function

This function prevents the battery from being discharged when the door is open or the dome light remains on with the ignition switch at the "LOCK" (OFF) position. The ETACS-ECU turns on its "keep" relay to switch off the battery power supply to the interior lights when the interior light loaded signal and all door switches remain on for approximately 30 minutes with the ignition switch at positions other than ACC. Then the interior lights will be switched off. If the ignition switch is turned on again, the ETACS-ECU turns on its "keep" relay to illuminate the interior lights.

Operation Of The Door-Ajar Indicator Light

This indicator light warns the driver that door(s) are not closed. If a door switch is on, the ETACS-ECU operates the door-ajar indicator light on the combination meter.

Technical Description (Comment)

The SWS monitor kit may be connected improperly.

Circuit Operation

  1. The power supply to the column switch is provided by the battery and the ignition switch (IG1).
  2. If the power supply system from the battery is defective, the system operates by the power supply from the ignition switch (IG1).

The power supply circuit to the column switch (column- ECU) may be defective. If the battery power supply circuit (terminal No. 1 of the column switch) to the ECU is damaged, also check the power supply circuit from the ignition switch (IG1) (terminal No. 9 of the column switch), and repair if necessary.

  1. The power supply to the ETACS-ECU is provided by the battery and the ignition switch (IG1).
  2. If the power supply system from the battery is defective, the system operates by the power supply from the ignition switch (IG1).

It is suspected that the power supply circuit to the ETACS-ECU is defective, or the wiring harness between the SWS monitor kit and the ETACS-ECU or their connector(s) is damaged. If the battery power supply circuit to the ECU (terminal No. 20 of the ETACS-ECU) is damaged, also check the power supply circuit from the ignition switch (IG1) (terminal No. 8 of the ETACS-ECU), and repair if necessary. If the ground circuit to the ECU (terminal No. 3 of the ETACS-ECU) is damaged, also check the ground circuit to the sensor (terminal No. 56 of the ETACS-ECU), and repair if necessary.

  1. The power supply to the front-ECU is provided by the battery and the ignition switch (IG2).
  2. If the power supply system from the battery is defective, the system operates by the power supply from the ignition switch (IG2).

It is suspected that the power supply circuit to the front-ECU is defective, or the wiring harness between the SWS monitor kit and the front-ECU or their connector(s) is damaged. If the battery power supply circuit to the ECU (terminal No. 7 of the front- ECU) is damaged, also check the power supply circuit from the ignition switch (IG2) (terminal No. 30 of the front-ECU), and repair if necessary.

  1. Power to the sunroof motor assembly is supplied through and fusible link (5).
  2. When the ignition switch (IG2) signal is on, the sunroof motor assembly is ready to operate.

The power supply circuit or the communication circuit to the sunroof motor assembly or the sunroof motor assembly may be defective.

The ETACS-ECU operates the ignition key reminder tone alarm function (sounds the tone alarm intermittently), based on input signals from the following switches

  1. Ignition Switch (IG1) OFF
  2. Key Reminder Switch OFF
  3. Driver's Door Switch ON

The ETACS-ECU operates the ignition key reminder tone alarm function (sounds the tone alarm intermittently) if any of the following conditions are satisfied

  1. Ignition Switch LOCK position (key inserted)
  2. Driver's Door OPEN

If the function does not work normally, the input circuit system from the switches or the ETACS-ECU may be defective (refer to "CIRCUIT OPERATION").

The ETACS-ECU operates the light reminder tone alarm function internally according to the following signals

  1. Ignition Switch (IG1) OFF
  2. Front Door Switch (LH) ON
  3. Taillight Switch ON
  4. Headlight Switch ON

The ETACS-ECU operates the light reminder tone alarm function internally under the following conditions

  1. Ignition Switch LOCK Position (Key Reminder)
  2. Driver's Door OPEN
  3. Lighting Switch Tail Or Head Position

If the function does not work normally, the input circuit system from the switches or the ETACS-ECU may be defective. See Circuit Operation .

The ETACS-ECU operates the seat belt tone alarm function intermittently according to signals from the following switches

  1. Ignition Switch (IG1) ON
  2. Driver's Seat Belt Switch ON

The ETACS-ECU operates the seat belt tone alarm function intermittently under the following conditions

  1. Ignition Switch ON or START
  2. Driver's Seat Belt UNFASTENED

If the function does not work normally, the input circuit system from the switches or the ETACS-ECU may be defective, see Circuit Operation .

The ETACS-ECU operates the central door lock system according to the following signals

  1. Driver's or passenger's door lock actuator switch.
  2. Driver's side door lock key cylinder switch.
  3. Door lock switch, which is incorporated in the power window main switch or power window sub switch (front RH).
  4. The ETACS-ECU locks or unlocks all the doors by operating the central door lock relay (incorporated in the ECU) in response to input signals.

The ETACS-ECU operates the central door lock system according to the following signals

  1. Driver's door lock actuator switch.
  2. Driver's or passenger's door lock key cylinder switch.
  3. Door lock switch, which is incorporated in the power window main switch or power window sub switch (front RH).
  4. The ETACS-ECU locks or unlocks all the doors by operating the central door lock relay (incorporated in the ECU) in response to input signals.

The wiring harness between the door lock actuator or the ETACS-ECU and the door lock actuator may be defective.

The door lock switch (built into the power window switch) or the ETACS-ECU may be defective.

The door lock switch (built into the power window switch) or the ETACS-ECU may be defective.

Technical Description

The driver's door lock actuator switch or the ETACS-ECU may be defective.

The ETACS-ECU turns on the power window relay (installed on the junction block) to activate the power windows when the ignition switch (IG1) is turned to the "ON" position.

The ETACS-ECU operates the power window timer function according to the following signals

  1. Ignition Switch (IG1)
  2. Front Door Switch

If the power window timer function does not work normally, its input circuit, the ETACS-ECU or the front-ECU may be defective.

The front power window motor (LH) opens or closes the door window (LH) when the power window main switch is moved to "UP" or "DOWN" position.

The power window main switch or the front power window motor (LH) may be defective.

Power window motors open or close the door windows when the front passenger's or rear passenger's sub switch is moved to "UP" or "DOWN" position.

A power window sub-switch or power window motor may be defective. Alternatively, the power window lock switch (incorporated in the power window main switch) may remain pressed to "LOCK" position.

When you operate each power window sub-switch for front or rear passengers (incorporated in the power window main switch), the corresponding power window motor operates, thus causing each power window to close or open.

If the corresponding power window opens and closes normally when each power window sub-switch is operated, the power window main switch may be defective.

A receiver is incorporated in the ETACS-ECU. This receiver receivers a lock or unlock signal from the transmitter.

The ETACS-ECU operates the following functions when it receives lock or unlock signal from the transmitter

  1. Dome light answerback function.
  2. Turn-signal light answerback function.
  3. Horn answerback function.

The turn-signal lights and horn answerback functions can be disabled or enabled. However, the dome light answerback function can not be disabled.

Step 6: Verify The Horn Operation

Does the horn work normally?

  1. YES Go to step «19»(ref-169966-S24525581402004122800000) .
  2. NO Go to step «7»(ref-169966-S15867119602004122800000) .

The ETACS-ECU operates the encrypted code register mode according to the following signals

  1. Key reminder switch.
  2. Hazard warning light switch.

Is the encrypted code register mode can not be set, the input circuits from the switches described in "CIRCUIT OPERATION" or the ETACS-ECU may be defective. If the encrypted code register mode can be set but the transmitter can not be registered, the transmitter or the ETACS-ECU may be defective.

  1. The sunroof motor assembly is energized through fusible link (5) by the battery.
  2. When the ignition switch (IG2) signal is on, the sunroof motor assembly is ready to operate.

The sunroof switch or the sunroof motor assembly may be defective.

  1. The sunroof timer function works according to the signals from the following switches: Ignition switch (IG1): OFF. Driver's and passenger's door switch: OFF
  2. Vehicle condition: Ignition Switch: LOCK position. Driver's And Passenger's Door: Closed
  3. When a front door is opened and closed while the sunroof timer function is on, the sunroof operative duration will be changed.

Is the sunroof timer function does not work normally, the input circuits from the switches described in Circuit Operation , the sunroof motor assembly, the ETACS-ECU or the SWS communication line may be defective.

The sunroof motor assembly monitors load condition according to the current, which runs in the motor. If a predetermined current is exceeded, the sunroof motor reverses due to safety mechanism. If the sunroof motor does not reverse when an excessive load is applied, the sunroof motor assembly may be defective.

  1. The windshield wiper and washer switch sends a signal through the column-ECU (incorporated in the column switch) to the front-ECU. If the column-ECU sends a windshield wiper and washer switch "ON" signal to the front-ECU, the front-ECU turns on the relay (incorporated in the front-ECU), thus causing the windshield wiper and washer motor to be turned on.
  2. If the SWS communication line is defective, the front-ECU operates windshield wiper motor by using the other communication lines (wiper backup circuit) instead of that line. In this case, the windshield wiper works at low speed regardless of the windshield wiper and washer switch positions ("LOW" or "HIGH").

If the windshield wiper does not work at all, the windshield wiper motor, column switch (windshield wiper and washer switch) or the front-ECU may be defective.

This system may be at fail-safe mode as the SWS communication line is defective. If the system can not receive any signal from the column switch (windshield wiper and washer switch) due to a open circuit in the SWS communication line or other reasons, the system will enter the fail-safe mode when the ignition switch is at the "ACC" position.

If either of the windshield wiper switch positions is defective, the windshield wiper motor, column switch (windshield wiper and washer switch) or the front-ECU may be defective.

If the windshield wiper does not stop at predetermined park position, the windshield wiper motor or the front-ECU may be defective.

If the windshield intermittent wiper interval is not changed by operating the windshield intermittent wiper interval adjusting knob or according to the vehicle speed, the column switch, the ETACS-ECU or the front-ECU may be defective.

If the windshield intermittent wiper interval is not changed according to the vehicle speed, the ETACS-ECU or the front-ECU may be defective.

The windshield washer switch sends a signal through the column-ECU (incorporated in the column switch) to the front-ECU. If the column-ECU sends a windshield washer switch "ON" signal to the front-ECU, the front-ECU turns on the relay (incorporated in the front-ECU), thus causing the windshield washer motor to be turned on.

If the windshield washer does not work normally, the windshield washer motor, the column switch (windshield wiper and washer switch) or the front-ECU may be defective.

The rear wiper switch sends a signal through the column-ECU (incorporated in the column switch) to the ETACS-ECU. If the column-ECU sends a rear wiper switch "ON" signal to the ETACS-ECU, the ETACS-ECU turns on the relay (incorporated in the ETACS-ECU), thus causing the rear wiper motor to be turned on.

The ETACS-ECU operates the rear wiper according to the ignition switch (ACC) and rear wiper switch.

If the rear wiper does not work normally, the input circuit system from the switches, the rear wiper motor, the column switch (windshield wiper and windshield washer switch) or the ETACS-ECU may be defective.

If the rear wiper does not stop at predetermined park position, the rear wiper motor or the ETACS-ECU may be defective.

The ETACS-ECU operates the rear wiper consecutively approximately twice when the selector lever is moved to "R" position while the rear wiper is turned on.

If the rear wiper does not work consecutively approximately twice, the Park/Neutral position switch ("R" position) or the ETACS-ECU may be defective.

The rear washer switch sends a signal through the column-ECU (incorporated in the column switch) to the ETACS-ECU. If the column-ECU sends a rear washer switch "ON" signal to the ETACS-ECU, the ETACS-ECU turns on the relay (incorporated in the ETACS-ECU), thus causing the rear washer motor to be turned on.

If the rear washer does not work normally, the rear washer motor, the column switch (windshield wiper and washer switch) or the front-ECU may be defective.

The ETACS-ECU operates the seat belt warning light according to the ignition switch (IG1) and the driver's seat belt switch.

If the driver turns the ignition switch to the "ON" position without fastening the seat belt, the seat belt warning light illuminates.

If the seat belt warning light does not illuminate, the input circuit, the combination meter (seat belt warning light bulb or printed-circuit board) or the ETACS-ECU may be defective.

When the lighting switch is set to "TAIL" position, the "TAIL" signal is sent through the column-ECU (incorporated in the column switch) to the front-ECU. IF the front-ECU receives the "TAIL" signal through the column-ECU, the front-ECU turns on the taillight relay (incorporated in the front-ECU), thus causing the taillights to illuminate.

If the taillights do not illuminate normally, the column switch or the front-ECU may be defective.

When the lighting switch is set to "HEAD" position, the "HEAD" signal is sent through the column-ECU (incorporated in the column switch) to the front-ECU. IF the front-ECU receives the "HEAD" signal through the column-ECU, the front-ECU turns on the headlight relay (incorporated in the front-ECU), thus causing the headlights to illuminate. The headlights always illuminate at low-beam by the headlight dimmer switch automatic resetting function.

If the SWS communication line is defective, the front-ECU operates the headlights by using the other communication lines (headlight backup circuit) instead of that line.

If the headlights (low-beam) do not illuminate normally, the column switch or the front-ECU may be defective.

When the dimmer switch is turned on, the column switch sends a signal to the front-ECU. Then the front-ECU switches the headlights from low-beam to high beam or vice versa.

If the headlights (high beam) do not illuminate normally, the column switch or the front-ECU may be defective.

If both of the headlights (low-beam and high-beam) do not illuminate, the input circuit from the passing switch or the front-ECU may be defective.

If the headlights illuminate at low-beam regardless of the lighting switch positions, the headlight operation is in fail-safe mode.

If the position lights, the taillights or the license plate lights do not illuminate, their bulb may be defective.

Step 1: Verify The Operation Of Each Light

Which light does not illuminate?

  1. Taillights (LH) And License Plate Light Go to step «2»(ref-169966-S19241448572005010300000) .
  2. Position Light (RH) And Taillights (RH) Go to step «4»(ref-169966-S25229373712005010300000) .
  3. Position Light (LH) Go to step «6»(ref-169966-S18266654782005010300000) .
  4. Position Light (RH) Go to step «12»(ref-169966-S38880852962005010300000) .
  5. Taillight (LH) Go to step «18»(ref-169966-S02303025332005010300000) .
  6. Taillight (RH) Go to step «24»(ref-169966-S31892574122005010300000) .
  7. License Plate Lights Go to step «30»(ref-169966-S00475725252005010300000) .
  8. License Plate Light (LH) Go to step «35»(ref-169966-S22928622552005010300000) .
  9. License Plate Light (RH) Go to step «41»(ref-169966-S25987833422005010300000) .
  10. Position Light (LH), Taillight (LH) And License Plate Light Go to step «47»(ref-169966-S06164715372005010300000) .
  11. All Lights See «INSPECTION PROCEDURE J-1: HEADLIGHT AND TAILLIGHT: TAILLIGHTS DOES NOT ILLUMINATE NORMALLY»(ref-169966-S32872138632004122900000) .

If one of the headlights does not illuminate, a headlight bulb may be defective.

Step 1: Check The Headlight Operation

Which of the headlights does not illuminate?

  1. LH (Low And High Beam) Go to step «2»(ref-169966-S11275370492005010300000) .
  2. RH (Low And High Beam) Go to step «5»(ref-169966-S28794889842005010300000) .
  3. LH (Only Low-Beam) Go to step «8»(ref-169966-S03248833802005010300000) .
  4. RH (Only Low-Beam) Go to step «11»(ref-169966-S34536273752005010300000) .
  5. LH (Only High Beam) Go to step «14»(ref-169966-S17137997772005010300000) .
  6. RH (Only High Beam) Go to step «17»(ref-169966-S32332513462005010300000) .
  7. Low Beam Only (Both RH And LH) See «INSPECTION PROCEDURE J-2: HEADLIGHT AND TAILLIGHT: HEADLIGHTS (LOW-BEAM) DO NOT ILLUMINATE NORMALLY»(ref-169966-S20289579902005010300000) .
  8. High Beam (Both RH And LH) And High-Beam Indicator Light See «INSPECTION PROCEDURE J-3: HEADLIGHT AND TAILLIGHT: HEADLIGHTS (HIGH-BEAM) DO NOT ILLUMINATE NORMALLY»(ref-169966-S29037616772005010300000) .
  9. Only High-Beam Indicator Light See «INSPECTION PROCEDURE J-8: HEADLIGHT AND TAILLIGHT: THE HIGH-BEAM INDICATOR LIGHT DOES NOT ILLUMINATE»(ref-169966-S35153619642005010300000) .

If the high-beam indicator light does not illuminate, the high-beam indicator light bulb or the ETACS-ECU may be defective.

Step 1: Verify The Headlight Operation

Do the headlights illuminate?

  1. YES Go to step «2»(ref-169966-S37688036702005010300000) .
  2. NO Repair the headlights first. See «FUNCTION SYSTEM SYMPTOM CHART»(ref-169966-S38419175652004122200000) table.

The ETACS-ECU operates the headlight automatic shutdown function according to the following signals

  1. Ignition Switch (IG1)
  2. Driver's Door Switch
  3. Tail light Switch
  4. Headlight Switch

If the function does not work normally, the input circuit system from the switches, the ETACS-ECU or the front-ECU may be defective, see Circuit Operation .

The headlight dimmer switch automatic resetting function is controlled by the front-ECU.

If the headlight dimmer switch automatic resetting function does not work normally, the front-ECU may be defective.

If the daytime running light function is not operating normally the daytime running light-ECU power circuit may be defective or the daytime running light-ECU may be defective.

Step 1: Verify The Headlight (High-Beam) Operation

Check to see that the headlight (high-beam) lights up properly when operating the dimmer switch while the headlight switch is ON.

Do the headlights (high-beam) illuminate normally?

  1. YES Go to step «2»(ref-169966-S33390726932005010300000) .
  2. NO See «INSPECTION PROCEDURE J-7: HEADLIGHT AND TAILLIGHT: ONE OF THE HEADLIGHTS DOES NOT ILLUMINATE»(ref-169966-S28410659102005010300000) .

The daytime running light-ECU may be defective if the daytime running light function does not operate normally.

  1. The turn-signal light switch sends a signal through the column-ECU (incorporated in the column switch) to the ETACS-ECU. If the column-ECU sends a turn-signal light switch "ON" signal to the ETACS-ECU, the ETACS-ECU turns on the flasher timer (incorporated in the ETACS-ECU), thus causing the turn-signal lights to flash.
  2. The ETACS-ECU operates the turn-signal lights according to the following signals: Ignition switch (IG1) and Turn-signal light switch.

Is the turn-signal lights do not flash normally, the input circuits from the switches described in "CIRCUIT OPERATION" or the ETACS-ECU may be defective. If the hazard warning lights do not flash, the power supply line to the ETACS-ECU (dedicated to the turn-signal lights) may be defective.

If the ETACS-ECU receives "ON" signal from the hazard warning light switch, the ETACS-ECU turns on the flasher timer (incorporated in the ETACS-ECU), thus causing the turn-signal lights to flash.

If the hazard warning lights do not flash, the power supply line to the ETACS-ECU (dedicated to the turn-signal lights) or the ETACS-ECU may be defective.

If the right or left turn-signal light does not illuminate, their bulb may be defective.

The ETACS-ECU illuminates the front dome light, the rear dome light and the luggage compartment light according to the following signals

  1. Ignition Switch (IG1)
  2. Key Reminder Switch
  3. Front Door Switch (LH)
  4. All Door Switches
  5. Driver's Door Lock Actuator Switch

If the front dome light, the rear dome light and luggage compartment light do not illuminate normally, the dome light bulb(s) may be burned out or the input circuit system from the switches, the power supply lines to the switches or the ETACS-ECU may be defective, see Circuit Operation . Alternatively, the delay-off function may be set to "0 second" by using the configuration function.

The ETACS-ECU operates the dome light according to the following signals

  1. Ignition Switch (IG1)
  2. Key Reminder Switch
  3. Front Door Switch
  4. All Door Switches
  5. Driver's Door Lock Actuator Switch

Is the dome light does not flash normally, a burned out dome light bulb, the input circuits from the switches described in "CIRCUIT OPERATION", the power supply line to the switches or the ETACS-ECU may be defective. Alternatively, the delay-off function may be set to "0 second" by using the configuration function.

The ETACS-ECU operates the dome light dimming function according to the following switches

  1. Ignition Switch (IG1)
  2. Key Reminder Switch
  3. Front Door Switches
  4. Driver's Door Lock Actuator Switch

Is the dome lights do not dim normally, the input circuits from the switches described in "CIRCUIT OPERATION" or the ETACS-ECU may be defective.

The ETACS-ECU operates the interior light automatic shutdown function according to the following switch signals

  1. Ignition Switch (ACC)
  2. Ignition Switch (IG1)
  3. Front Door Switch (LH)
  4. All Door Switches
  5. Interior Light Loaded Signal

If the function does not work normally, the input circuit system from the switches or the ETACS-ECU may be defective, see Circuit Operation .

The ETACS-ECU operates the door ajar indicator light according to the following switch signals

  1. Front Door Switch
  2. All Door Switches

If the door ajar indicator light does not illuminate normally, the input circuit system from the switches or the ETACS-ECU may be defective. See Circuit Operation .

The ETACS-ECU operates the following equipment according to signal from the ignition switch (ACC)

  1. Windshield Wiper And Washer
  2. Rear Wiper And Washer

If the signal is not normal, the equipment, which is described in Circuit Operation , does not work normally.

The ETACS-ECU operates the following equipment or functions according to signal from the ignition switch (IG1)

  1. Ignition Key Reminder Tone Alarm Function
  2. Light Reminder Tone Alarm Function
  3. Seat Belt Tone Alarm Function
  4. Power Window Timer Function
  5. Seat Belt Warning Light
  6. Headlight Automatic Shutdown Function
  7. Turn-Signal Light
  8. Dome Light Dimming Function
  9. If the power supply circuit from the battery to the ETACS-ECU is open, this circuit is used as a backup circuit.

If the signal is not normal, the equipment or functions, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the rear wiper according to signal from the backup light switch.

If the signal is not normal, the rear wiper does not operate consecutively twice when the shift lever is moved to the "R" position with the rear wiper on. If the signal is not normal, the backup light switch or the ETACS-ECU may be defective.

The ETACS-ECU operates the rear wiper according to signal from the park/neutral position switch.

Note. The Park/Neutral position switch is shared with the automatic transaxle control system. If this problem is not solved, carry out the troubleshooting regarding the automatic transaxle control system. See appropriate AUTOMATIC TRANSMISSION article.

If the signal is not normal, the rear wiper does not operate consecutively twice when the selector lever is moved to the "R" position with the rear wiper on. If the signal is not normal, the Park/Neutral position switch or the ETACS-ECU may be defective.

The ETACS-ECU operates the following functions or systems according to signal from the driver's or front passenger's door switches

  1. Ignition Key Reminder Tone Alarm Function
  2. Light Reminder Tone Alarm Function
  3. Power Window Timer Function
  4. Headlight Automatic Shutdown Function
  5. Dome Light

If the signal is not normal, the functions or systems, which are described in Circuit Operation , do not work normally. If the signal is not normal, the driver's or front passenger's door switch or the ETACS-ECU may be defective.

The ETACS-ECU operates the following equipment or functions according to signal from the column switch (turn-signal light and lighting switch)

  1. Light Reminder Tone Alarm Function
  2. Headlight
  3. Turn-Signal Light

If the signal is not normal, the equipment or functions, which are described in Circuit Operation , do not work normally. If the signal is not normal, the column switch (turn-signal light and lighting switch) or the ETACS-ECU may be defective.

The ETACS-ECU operates the following equipment or functions according to signal from the column switch (windshield wiper and washer switch)

  1. Windshield Wiper And Washer
  2. Rear Wiper And Washer

If the signal is not normal, the equipment, which is described in Circuit Operation , does not work normally.

The ETACS-ECU calculates the windshield intermittent wiper interval according to the position of the windshield intermittent wiper interval adjusting knob, which is incorporated in column switch (windshield wiper and washer switch).

If the windshield intermittent wiper interval can not be adjusted, the column switch or the ETACS-ECU may be defective.

The ETACS-ECU receives a signal through the sunroof motor assembly via the SWS communication line from the sunroof switch, and sends a signal to the data link connector.

If the SWS communication line between the sunroof motor assembly and the ETACS-ECU is defective, the ETACS-ECU cannot identify the input signal from the sunroof switch even if the sunroof is normal.

Step 1: Verify The Sunroof Operation

Does the sunroof work normally?

  1. YES Go to step «2»(ref-169966-S18452714112005010500000) .
  2. NO See «INSPECTION PROCEDURE F-1: SUNROOF: SUNROOF DOES NOT OPERATE»(ref-169966-S08144672832004122800000) .

The ETACS-ECU operates the following functions or systems according to signal from the key reminder switch

  1. Ignition Key Reminder Tone Alarm Function
  2. Keyless Entry System
  3. Dome Light Dimming Function

If the signal is not normal, the functions or systems, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the following functions or systems according to signal from the hazard warning light switch

  1. Hazard Warning Light
  2. Keyless Entry System (Registering The Encrypted Code)

If the signal is not normal, the equipment or systems, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the following functions and equipment according to signal from the driver's seat belt switch

  1. Seat Belt Tone Alarm Function
  2. Seat Belt Warning Light

If the signal is not normal, the equipment and functions, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the following functions or systems according to signal from the driver's or front passenger's, rear or back door switches

  1. Light Reminder Tone Alarm Function
  2. Power Window Timer Function
  3. Headlight Automatic Shutdown Function
  4. Keyless Entry System
  5. Dome Light

If the signal is not normal, the functions or systems, which are described in Circuit Operation , do not work normally. If the signal is not normal, the driver's, front passenger's, rear or back door switch or the ETACS-ECU may be defective.

The ETACS-ECU operates the central door locking system according to signal from the driver's door lock key cylinder switch.

If the signal is not normal, the systems, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the following functions or systems according to signal from the driver's or front passenger's, rear or back door lock actuator switch

  1. Central Door Locking System
  2. Keyless Entry System
  3. Dome Light Dimming Function

If the signal is not normal, the functions or systems, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the central door locking system according to signal from the door lock switch.

If the signal is not normal, the doors is not locked or unlocked. If the signal is not normal, the power window main switch, power window sub switch or the ETACS-ECU may be defective.

The ETACS-ECU controls the windshield intermittent wiper interval according to the vehicle speed sensor signal.

If the signal is not normal, the wiper interval, which is described in Circuit Operation , will not be changed correctly. If the signal is not normal, the vehicle speed sensor or the ETACS-ECU may be defective.

The ETACS-ECU controls the windshield intermittent wiper interval according to the vehicle speed signal, which the powertrain control module sends.

If the signal is not normal, the wiper interval, which is described in Circuit Operation , will not be changed correctly. If the signal is not normal, the powertrain control module or the ETACS-ECU may be defective.

The ETACS-ECU receives signal through its receiver from the transmitter, and operates the keyless entry system according to the signal.

If the signal is not normal, the systems, which are described in Circuit Operation , do not work normally.

The ETACS-ECU operates the following equipment or functions by the interior light loaded signal

  1. Interior Light Automatic Shutoff Function
  2. Front Dome Light, Rear Dome Light And Luggage Compartment Light
  3. Door-Ajar Indicator Light

If the signal is not normal, the equipment or functions, which are described in Circuit Operation , do not work normally.

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