KEYLESS CONTROL MODULE INSPECTION

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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 Voltage Table (Reference)

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Terminal | Signal name | Connected to | Measured condition | Voltage (V)/Continuity | Inspection item(s)
--- | --- | --- | --- | --- | ---
1A | Door lock control | Door lock actuator (driver-side) | Door lock actuator locking | 1.0 or less → B+→ 1.0 or less | • Door lock actuator (driver-side) • Related wiring harnesses
Other | 1.0 or less
1B | GND | GND | Under any condition: Inspect for continuity to GND. | Continuity detected | • Related wiring harnesses
1C | Door unlock control | Door lock actuator | Door lock actuator unlocking | 1.0 or less → B+→ 1.0 or less | • Door lock actuator • Related wiring harnesses
Other | 1.0 or less
1D | Door lock control | Door lock actuator | Door lock actuator locking | 1.0 or less → B+→ 1.0 or less | • Door lock actuator • Related wiring harnesses
Other | 1.0 or less
1E | Power supply | D.LOCK 20 A fuse | Under any condition | B+ | • D.LOCK 20 A fuse • Battery
1F | Power supply | ROOM 15 A fuse | Under any condition | B+ | • ROOM 15 A fuse • Battery
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
3R | Theft-deterrent siren signal*1 | Theft-deterrent siren | Theft-deterrent system arming (See Inspection Using an Oscilloscope (Reference).) | — | • Theft-deterrent siren • Related wiring harnesses
Instrument cluster signal*2 | Instrument cluster | Under any condition: Inspect for continuity to instrument cluster. | Continuity detected | • Instrument cluster • Related wiring harnesses
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 compartment light switch • Related wiring harnesses
Trunk lid closed (trunk compartment light switch off) | B+
3AB | Power supply (With intruder sensor) | Intruder sensor | Under any condition | B+ | Intruder sensor
3AD | Communication (With intruder sensor) | Intruder sensor | Under any condition: Inspect for continuity to steering lock unit. | Continuity detected | Intruder sensor
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
4G | Lock/unlock input | Driver-side door key cylinder switch | At the moment key cylinder is locked | 2.5 | • Driver-side door key cylinder switch • Related wiring harnesses
At the moment key cylinder is unlocked | 1.0 or less
At the moment key cylinder is neutral position | 5
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
4N | Hazard output | Hazard warning switch | Hazard warning switch is on. | 1.0 or less | • Hazard warning switch • Related wiring harnesses
Hazard warning switch is off. | B+
4O | Trunk lid opener switch input | Trunk lid opener switch | Trunk lid opener switch on | B+ | • Trunk lid opener switch • Related wiring harnesses
Trunk lid opener switch off | 1.0 or less
4P | Trunk lid opener output | Trunk lid opener relay | Press the trunk open switch | 1.0 or less | • Trunk lid opener relay • Related wiring harnesses
Other | B+
4Q | Door switch signal (RH) output | Door switch | Door open (RH) (Door switch on) | 1.0 or less | • Door switch (RH) • Related wiring harnesses
Door closed (RH) (Door switch off) | B+
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 | Theft-deterrent siren signal | Theft-deterrent siren | Theft-deterrent system arming (See Inspection Using an Oscilloscope (Reference).) | — | • Theft-deterrent siren • Related wiring harnesses
4T | Door switch signal (LH) output | Door switch | Door open (LH) (Door switch on) | 1.0 or less | • Door switch (LH) • Related wiring harnesses
Door closed (LH) (Door switch off) | B+
4V | Bonnet latch switch signal | Bonnet latch switch | Bonnet open (Bonnet latch switch off) | B+ | • Bonnet latch switch • Related wiring harnesses
Bonnet closed (Bonnet latch switch on) | 1.0 or less
4W | Top lock switch signal | Top lock switch | Convertible top open (Top lock switch on) | 1.0 or less | • Top lock switch • Related wiring harnesses
Convertible top closed (Top lock switch off) | B+
4Z | HS-CAN- | — | Terminal used for communication therefore determination based on terminal voltage inspection not possible.
4AA | HS-CAN+ | — | Terminal used for communication therefore determination based on terminal voltage inspection not possible.

*1 :With TPMS
*2 :Without TPMS

Inspection Using an Oscilloscope (Reference)

Theft-deterrent siren signal

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  • Terminal connected: 3R, 4S (+)—Negative battery terminal
  • Oscilloscope setting: 2 V/DIV (Y): 100 ms/DIV (X), DC range
  • Measurement condition: Theft-deterrent system arming.