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AUTO LIGHT/RUNNING LIGHT CONTROL MODULE INSPECTION

id091800899500

1. Connect the connector to the auto light/running light control module.

2. Connect the negative battery cable.

3. Measure the voltage at the auto light/running light control module using voltmeter.

  • When inspecting terminal 1G, 2J or 1J for continuity, disconnect the auto light/running light control module connector.

4. If the value are not as specified in the Terminal Voltage List (Reference), inspect the parts under "Action" and related wiring harnesses.

5. If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the auto light/running light control module.

## Terminal Voltage List (Reference)

Terminal | Signal | Connected to | Test condition | Voltage (V)/Continuity | Action
--- | --- | --- | --- | --- | ---
1A | Windshield wiper switch signal (AUTO) | Windshield wiper switch | Ignition switch at ON | Windshield wiper switch at AUTO position | B+ | • Windshield wiper switch • Inspect related harness
Windshield wiper switch at OFF position | 1.0 or less
1B | Autostop switch signal | Autostop switch | Ignition switch at ON | Windshield wiper moving | B+ | • Autostop switch (windshield wiper motor) • Inspect related harness
Windshield wiper stopped | 1.0 or less
1C | Windshield wiper switch signal (high) | Windshield wiper and washer switch | Ignition switch at ON | Windshield wiper switch at high position | B+ | • Windshield wiper and washer switch • Inspect related harness
Windshield wiper switch at OFF position | 1.0 or less
1D | Windshield wiper switch signal (low) | Windshield wiper and washer switch | Ignition switch at ON | Windshield wiper moving | B+ | • Windshield wiper and washer switch • Inspect related harness
Windshield wiper stopped | 1.0 or less
1E | Illumination light on/off | TNS relay | Ignition switch at ON position | B+ | • Inspect ILLUMI 10 A fuse • Inspect TNS relay (See RELAY INSPECTION.) • Inspect related harness
Ignition switch at LOCK or ACC position | Headlight switch (light) at TNS or headlight position | B+
Headlight switch (light) at OFF position | Below 1.0
1F | Illumination light operation | • Instrument cluster • Panel control switch | Headlight switch (light) at TNS or headlight position | B+ | -
Headlight switch (light) at OFF position | Below 1.0
1G | Auto light /running light control module ground | GND | Under any condition: inspect for continuity to ground | Yes | • Inspect GND
1H | Headlight relay (high-beam) on/off | Headlight relay | Ignition switch at ON position | Headlight switch (light) at headlight position | Headlight switch (dimmer) at LO position | B+ | • Inspect headlight switch (See LIGHT SWITCH INSPECTION.) • Inspect related harness
Headlight switch (dimmer) at HI position | B+
Flash-to-pass on | B+
1I | Headlight high operation | Headlight switch (dimmer switch: HI position) | Ignition switch at ON position | Headlight switch (light) at headlight position | Headlight switch (dimmer) at LO position | B+ | • Inspect headlight relay (See RELAY INSPECTION.) • Inspect related harness
Headlight switch (dimmer) at HI position | Below 1.0
Flash-to-pass on | Below 1.0
1J | Headlight (high-beam) on/off | Headlight switch | Headlight switch (dimmer) at LO position: inspect for continuity to ground | No | • Inspect headlight switch (See LIGHT SWITCH INSPECTION.) • Inspect related harness
Headlight switch (dimmer) at HI position: inspect for continuity to ground | Yes
1K | Washer switch signal | Windshield wiper and washer switch | Ignition switch at ON | Washer switch on | B+ | • Windshield wiper and washer switch • Inspect related harness
Washer switch off | 1.0 or less
1L | power supply | Ignition switch | Ignition switch at on | B+ | • Ignition switch • Inspect related harness
Ignition switch at off | 1.0 or less
2A | Vehicle speed input | ABS HU/CM or DSC HU/CM | (See 2A Terminal Inspection.) | - | • ABS HU/CM or DSC HU/CM • Inspect related harness
2B | Sensitivity adjustment volume | Windshield wiper and washer switch | Ignition switch at ON position | Sensitivity adjustment volume turned from + position to - position | 0 → 0.8 → 1.5 → 1.9 → 2.2 | • Windshield wiper and washer switch • Inspect related harness
2C | IG1 | METER IG 15 A fuse | Ignition switch at ON position | B+ | • Inspect METER IG 15 A fuse • Inspect related harness
Ignition switch at LOCK or ACC position | Below 1.0
2D | Flash-to-pass on/off | Headlight switch (dimmer switch) | Headlight switch (light) at OFF or TNS position | No | • Inspect headlight switch (See LIGHT SWITCH INSPECTION.) • Inspect related harness
Headlight switch (light) at headlight position | No
Flash-to-pass | Yes
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 • Inspect related harness
2F | DLC-2 power supply | DLC-2 | Connect the DLC-2 | - | • Inspect related harness
2G | TNS relay on/off | TNS relay | Ignition switch at ON position | Below 1.0 | • Inspect TNS relay (See RELAY INSPECTION.) • Inspect related harness
Ignition switch at LOCK or ACC position and headlight switch (light) at OFF position | B+
2H | Auto stop switch signal | Rain sensor | Windshield wiper moving | B+ | • Auto stop switch (windshield wiper motor) • Rain sensor • Inspect related harness
Windshield wiper stopped | 1.0 or less
2I | Front fog light relay on/off | Front fog light relay | Headlight switch (light) at TNS or headlight position | Front fog light switch at ON position | Below 1.0 | • Inspect TNS relay (See RELAY INSPECTION.) • Inspect front fog light relay (See RELAY INSPECTION.) • Inspect related harness
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: inspect for continuity to ground | No | • Inspect front and rear fog light switch (See FRONT AND REAR FOG LIGHT SWITCH INSPECTION.) • Inspect related harness
Front and rear fog light switch at ON position: inspect for continuity to ground | Yes
2K | Headlight relay on/off | Headlight relay | Ignition switch at ON position | Below 1.0 | • Inspect headlight relay (See RELAY INSPECTION.) • Inspect related harness
Ignition switch at LOCK or ACC and headlight switch (light) at OFF position | B+
2L | Light switch signal | Headlight switch | Ignition switch at ON | Light switch at AUTO position | 1.0 or less | • Light switch • Inspect related harness
Other | B+
2M | TNS on/off | Headlight switch | Headlight switch (light) at OFF position | No | • Inspect headlight switch (See LIGHT SWITCH INSPECTION.) • Inspect related harness
Headlight switch (light) at TNS or headlight position | Yes
2N | Headlight switch signal | Headlight switch | Light switch at headlight position | 1.0 or less | • Light switch • Inspect related harness
Light switch at OFF position | B+
2O | Rear fog light switch signal | Rear fog light switch | Headlight switch (light) at headlight position and front fog switch at ON position | Rear fog switch at ON | 1.0 or less | • Rear fog light switch • Inspect related harness
Rear fog switch at OFF position | B+
2P | Rear fog light control | Rear fog light relay | Headlight switch (light) at headlight position and front fog switch at ON position | Rear fog switch at ON | 1.0 or less | • Rear fog light relay • Inspect related harness
Rear fog switch at OFF position | B+

## 2A Terminal Inspection

1. Connect the negative battery cable.

2. Verify that the vehicle speed signal to auto light control module terminal 2A is input correctly using an oscilloscope.

  (1) Connect the oscilloscope and inspect auto light control module terminal 2A and the negative battery terminal.
  (2) Set the oscilloscope to 5V/DIV (Y), 20 ms/DIV (X), DC range.
  (3) Verify that the wave pattern in the figure is displayed while the vehicle is moving at 20 km/h.

  Note

  • As the vehicle speed increases, the frequency shortens.