1. Connect the connector to the auto light control module.
2. Connect the negative battery cable.
3. Measure the voltage at the auto light control module using voltmeter.
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 control module.
|
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
|
1.0 or less
|
• 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 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
|
Below 1.0
|
• Inspect headlight switch (See LIGHT SWITCH INSPECTION.)
• Inspect related harness
|
|
|
Headlight switch (light) at headlight position and headlight switch (dimmer) at LO position
|
B+
|
|||||
|
Headlight switch (light) at headlight position and 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
|
Below 1.0
|
• Inspect headlight relay (See RELAY INSPECTION.)
• Inspect related harness
|
|
|
Headlight switch (light) at headlight position
|
Headlight switch (dimmer) at LO position
|
B+
|
||||
|
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
|
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
|
Headlight switch (light) at TNS position
|
Below 1.0
|
• Inspect TNS relay (See RELAY INSPECTION)
• Inspect related harness
|
|
|
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
|
Headlight switch (light) at headlight position
|
Below 1.0
|
• Inspect headlight relay (See RELAY INSPECTION.)
• Inspect related harness
|
|
|
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+
|
|||||
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.
