1. Measure the voltage or inspect for continuity according to 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.
|
Terminal |
Signal name |
Connected to |
Measured condition |
Voltage (V)/Continuity |
Inspection item(s) |
|
1A |
Door unlock control |
Door lock actuator (driver’s side) |
Door lock actuator unlocking |
1.0 or less → B+ → 1.0 or less |
|
|
Other |
1.0 or less |
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|
1B |
GND |
GND |
Under any condition: Inspect for continuity to GND. |
Continuity detected |
|
|
1C |
Door lock control |
Door lock actuator |
Door lock actuator locking |
1.0 or less → B+ → 1.0 or less |
|
|
Other |
1.0 or less |
||||
|
1D |
Door unlock control |
Door lock actuator (except driver’s side) |
Door lock actuator unlocking |
1.0 or less → B+ → 1.0 or less |
|
|
Other |
1.0 or less |
||||
|
1E |
Power supply |
D.LOCK 20 A fuse |
Under any condition |
B+ |
|
|
1F |
Power supply |
ROOM 15 A fuse |
Under any condition |
B+ |
|
|
3B |
IG1 |
METER 15 A fuse |
Ignition switch is at ON position |
B+ |
METER 15 A fuse |
|
Ignition switch is at LOCK or ACC position |
1.0 or less |
||||
|
3C |
GND |
body ground |
Under any condition: Inspect for continuity to ground. |
Continuity detected |
GND |
|
3F |
Security light |
Instrument cluster |
Under any condition: Inspect for continuity to instrument cluster. |
Continuity detected |
Instrument cluster |
|
3O |
Key reminder switch |
Steering lock unit |
Key reminder switch is ON |
B+ |
Steering lock unit |
|
Other |
1.0 or less |
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|
3R |
TPMS signal |
Instrument cluster |
Under any condition: Inspect for continuity to instrument cluster. |
Continuity detected |
Instrument cluster |
|
3S |
Power supply (keyless receiver) |
Keyless receiver |
Under any condition |
B+ |
Keyless receiver |
|
3U |
Communication (keyless receiver) |
Keyless receiver |
Under any condition: Inspect for continuity to keyless receiver. |
Continuity detected |
Keyless receiver |
|
3Z |
Trunk open signal |
Trunk compartment light switch |
Trunk lid open (trunk compartment light switch on) |
1.0 or less |
|
|
Trunk lid closed (trunk compartment light switch off) |
B+ |
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|
4B |
Lock/unlock input |
Door lock switch |
Door lock switch is locked |
2.5 |
|
|
Door lock switch is unlocked |
1.0 or less |
||||
|
Other |
5 |
||||
|
4E |
Lock signal input |
Door lock-link switch (driver-side) |
Driver-side door is locked: Inspect for continuity to ground. |
Continuity detected |
Door lock-link switch (driver-side) |
|
Driver-side door is unlocked: Inspect for continuity to ground. |
No continuity |
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|
4G |
Lock/unlock input |
Driver-side door key cylinder switch |
At the moment key cylinder is locked |
2.5 |
|
|
At the moment key cylinder is unlocked |
1.0 or less |
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|
At the moment key cylinder is neutral position |
5 |
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|
4I |
Unlock signal input |
Door lock-link switch (driver-side) |
Driver-side door is unlocked: Inspect for continuity to ground. |
Continuity detected |
Door lock-link switch (driver-side) |
|
Driver-side door is locked: Inspect for continuity to ground. |
No continuity |
||||
|
4K |
Unlock input (trunk lid) |
Trunk key cylinder switch |
At the moment key cylinder is unlocked |
1.0 or less |
|
|
At the moment key cylinder is neutral position |
5 |
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|
4N |
Hazard output |
Hazard warning light |
Press the LOCK button (transmitter) |
B+→1.0 or less→B+ |
|
|
Press the UNLOCK button (transmitter) |
B+→1.0 or less→B+→1.0 or less→B+ |
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|
Other |
B+ |
||||
|
4P |
Trunk open output |
Trunk opener relay |
Press the trunk open switch |
1.0 or less |
|
|
Other |
B+ |
||||
|
4Q |
Door switch signal (RH) output |
Door switch |
Door open (RH) (Door switch on) |
1.0 or less |
|
|
Door closed (RH) (Door switch off) |
B+ |
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|
4R |
Unlock signal input |
Door lock-link switch (passenger-side) |
Passenger-side door is unlocked: Inspect for continuity to ground. |
Continuity detected |
Door lock-link switch (passenger-side) |
|
Passenger-side door is locked: Inspect for continuity to ground. |
No continuity |
||||
|
4S*1 |
Serial communication |
Power window main switch |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
- |
|
|
4T |
Door switch signal (LH) output |
Door switch |
Door open (LH) (Door switch on) |
1.0 or less |
|
|
Door closed (LH) (Door switch off) |
B+ |
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|
4U |
Horn on/off |
Horn relay |
Transmitter LOCK button is pressed twice within 5 s. |
B+→1.0 or less→B+ |
|
|
Other |
B+ |
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|
4V |
Hood switch signal |
Hood switch |
Hood open (Hood latch switch off) |
B+ |
|
|
Hood closed (Hood latch switch on) |
1.0 or less |