AUTO LIGHT/WIPER CONTROL MODULE INSPECTION

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1. Remove the dashboard under cover (Driver side). (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION.)

2. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

  • If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
    ― If the system does not work normally even though the inspection items or related wiring harnesses do not have any malfunction, replace the auto light/wiper control module.

Terminal Voltage List (Reference)

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Terminal | Signal | Connection | Test condition | Voltage (V) | Action
--- | --- | --- | --- | --- | ---
1A | Headlight relay (LO) operation | Headlight relay (LO) | Light switch at HEAD or HI position | 1.0 or less | • Headlight relay (LO)
Light switch at OFF or TNS position | B+
1B | IG1 | METER 10 A fuse | Ignition switch at ON | B+ | • METER 10 A fuse
Ignition switch at OFF or ACC | 1.0 or less
1C | Autostop switch signal | Autostop switch | Ignition switch at ON | Windshield wiper moving | B+ | • Autostop switch (Windshield wiper motor)
Windshield wiper stopped | 1.0 or less
1D | Windshield wiper switch signal (OFF) | Windshield wiper and washer switch | Ignition switch at ON | Windshield wiper moving | B+ | • Windshield wiper and washer switch
Windshield wiper stopped | 1.0 or less
1E | IG2 | WIPER 30 A fuse | Ignition switch at ON | B+ | • WIPER 30 A fuse
Ignition switch at OFF or ACC | 1.0 or less
1F | Windshield wiper switch signal (HI) | Windshield wiper and washer switch | Ignition switch at ON | Windshield wiper switch at HI position | B+ | • Windshield wiper and washer switch
Windshield wiper switch at OFF position | 1.0 or less
1G | Power ground | GND | Under any condition | 1.0 or less | • Power ground
1H | Windshield wiper switch signal (AUTO) | Windshield wiper and washer switch | Ignition switch at ON | Windshield wiper switch at AUTO position | B+ | • Windshield wiper and washer switch
Other | 1.0 or less
1I*2 | Running light control | Running light (LH, RH) | Ignition switched ON (engine off) and light switch OFF | Running light illuminates | B+ | • Running light (LH, RH)
Running light turns off | 1.0 or less
1J | Washer switch signal | Windshield wiper and washer switch | Ignition switch at ON | Washer switch at ON position | B+ | • Windshield wiper and washer switch
Washer switch at OFF position | 1.0 or less
1K | Headlight relay (HI) operation | Headlight relay (HI) | Light switch at OFF or HI or TNS position | 1.0 or less | • Headlight relay (HI)
Light switch at HEAD position | B+
1L | Light switch signal (LOW) | Light switch | Ignition switch at ON | Light switch at HI or PASS position | B+ | • Light switch
Other | 1.0 or less
2A*1 | Rear fog light control | Rear fog light relay | Light switch at TNS or HEAD position | Rear fog light switch at ON position | 1.0 or less | • Rear fog light relay
Rear fog light switch at OFF position | B+
2B | Sensitivity adjustment volume | Windshield wiper and washer switch | Ignition switch at ON | Sensitivity adjustment volume turned from + position to - position | 0 → 0.8 → 1.5 → 1.9 → 2.2 | • Windshield wiper and washer switch
2C | Light switch signal (PASS) | Light switch | Light switch at PASS position | 1.0 or less | • Light switch
Light switch at OFF position | B+
2D | Power supply | • BCM • ROOM 15 A fuse | Under any condition | B+ | • BCM • ROOM 15 A fuse
2E | Wiper or headlight operation request | Rain sensor | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. | — | • Rain sensor
2F | DLC-2 | DLC-2 | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. | — | • DLC-2
2G | TNS relay operation | TNS relay | Light switch at TNS or HEAD position | Below 1.5 | • TNS relay
Light switch at OFF | B+
2H | Rain sensor operation request | Rain sensor | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. | — | • Rain sensor
2I | Front fog light relay on/off | Front fog light relay | Light switch at TNS or HEAD position | Front fog light switch at ON position | 1.0 or less | • Front fog light relay
Front fog light switch at OFF position | B+
2J | Front fog light on/off | Front and rear fog light switch | Front and rear fog light switch at OFF position | Front fog light switch at ON position | 1.0 or less | • Fog light switch
Front fog light switch at OFF position | B+
2K*1 | Rear fog light switch signal | Rear fog light switch | Light switch at TNS or HEAD position | Rear fog light switch at ON position | 1.0 or less | • Rear fog light switch
Rear fog light switch at OFF position | B+
2L | Light switch signal (AUTO) | Light switch | Ignition switch at ON | Light switch at AUTO position | 1.0 or less | • Light switch
Other | B+
2M | Light switch signal (TNS) | Light switch | Ignition switch at ON | Light switch at TNS or HEAD position | 1.0 or less | • Light switch
Other | B+
2N | Light switch signal (HEAD) | Light switch | Ignition switch at ON | Light switch at HEAD position | 1.0 or less | • Light switch
Other | B+
2O | GND | GND | Under any condition | 1.0 or less | • Body ground
2P | BCM signal | BCM | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. | — | • BCM

*1 :With Rear fog light
*2 :With Running light