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
•  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
•  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.