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2008 - MX-5 - Body and Accessories

KEYLESS CONTROL MODULE INSPECTION [ADVANCED KEYLESS SYSTEM]

1. Measure the voltage or inspect for continuity according to the Terminal Voltage Table (Reference).

Terminal Voltage Table (Reference)



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

  • Door lock actuator (driver’s 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 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

1D

Door unlock control

Door lock actuator (except driver’s side)

Door lock actuator unlocking

1.0 or less → B+ → 1.0 or less

  • Door lock actuator (except driver’s side)

  • Related wiring harnesses

Other

1.0 or less

1E

Power supply

D.LOCK 30 A fuse

Under any condition

B+

  • D.LOCK 30 A fuse

  • Battery

1F

Power supply

ROOM 15 A fuse

Under any condition

B+

  • ROOM 15 A fuse

  • Battery

2A

keyless antenna (exterior, RF)(+)

keyless antenna (exterior, RF)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, RF)

2B

keyless antenna (exterior, RF)(-)

keyless antenna (exterior, RF)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, RF)

2C

keyless antenna (exterior, LF)(+)

keyless antenna (exterior, LF)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, LF)

2D

keyless antenna (exterior, LF)(-)

keyless antenna (exterior, LF)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, LF)

2E

keyless antenna (exterior, rear) (+)

keyless antenna (exterior, rear)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, rear)

2F

keyless antenna (exterior, rear) (-)

keyless antenna (exterior, rear)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (exterior, rear)

2G

keyless antenna (interior, trunk) (+)

keyless antenna (interior, trunk)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, trunk)

2H

keyless antenna (interior, trunk) (-)

keyless antenna (interior, trunk)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, trunk)

2I

keyless antenna (interior, rear) (+)

keyless antenna (interior, rear)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, rear)

2J

keyless antenna (interior, rear) (-)

keyless antenna (interior, rear)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, rear)

2K

keyless antenna (interior, middle)(+)

keyless antenna (interior, middle)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, middle)

2L

keyless antenna (interior, middle)(-)

keyless antenna (interior, middle)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, middle)

3B

IG1

ENGINE 10 A fuse

Ignition switch is at ON position

B+

ENGINE 10 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

3G

keyless antenna (interior, front)(+)

keyless antenna (interior, front)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, front)

3H

keyless antenna (interior, front)(-)

keyless antenna (interior, front)

Under any condition: Inspect for continuity to keyless antenna.

Continuity detected

keyless antenna (interior, front)

3I

ACC

METER 10 A fuse

Ignition switch is at ACC position

B+

METER 10 A fuse

Ignition switch is at LOCK or ON position

1.0 or less

3K

Buzzer (interior)

Instrument cluster

Buzzer operated

1.0 or less

Instrument cluster

Other

5.0

3N

Start knob (push switch)

Steering lock unit

Start knob is Pushed

B+

Steering lock unit

Other

1.0 or less

3O

Key reminder switch

Steering lock unit

Key reminder switch is ON

B+

Steering lock unit

Other

1.0 or less

3P

Communication (steering lock unit)

Steering lock unit

Under any condition: Inspect for continuity to steering lock unit.

Continuity detected

Steering lock unit

3R

TPMS signal

Instrument cluster

Under any condition: Inspect for continuity to instrument cluster.

Continuity detected

Instrument cluster

3S

Power supply (keyless receiver, front)

Keyless receiver, front

Under any condition

B+

Keyless receiver, front

3U

Communication (keyless receiver, front)

Keyless receiver, front

Under any condition: Inspect for continuity to keyless receiver, front.

Continuity detected

Keyless receiver, front

3V

Power supply (keyless receiver, rear)

Keyless receiver, rear

Under any condition

B+

Keyless receiver, rear

3X

Communication (keyless receiver, rear)

Keyless receiver, rear

Under any condition: Inspect for continuity to keyless receiver, rear.

Continuity detected

Keyless receiver, rear

3Y*1

Tx-PATS

Coil antenna

Ignition switch is at ON position

B+

Coil antenna

Ignition switch is at LOCK or ACC position

1.0 or less

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+

3AA*1

Rx-PATS

Coil antenna

Ignition switch is at ON position

5.0

Coil antenna

Ignition switch is at LOCK or ACC position

1.0 or less

4A*1

Tx

Instrument cluster

Ignition switch is at ON position

B+

Instrument cluster

Ignition switch is at LOCK or ACC position

1.0 or less

4B

Lock/unlock input

Door lock switch

Door lock switch is locked

2.5

  • Door lock switch (driver-side)

  • Door lock switch (passenger-side)

  • Related wiring harnesses

Door lock switch is unlocked

1.0 or less

Other

5

4C*1

Rx

Instrument cluster

Ignition switch is at ON position

B+

Instrument cluster

Ignition switch is at LOCK or ACC position

1.0 or less

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

4H

Request switch input (RH)

Request switch (RH)

Request switch (RH) is ON: Inspect for continuity to ground.

Continuity detected

Request switch (RH)

Request switch (RH) is OFF: Inspect for continuity to ground.

No continuity

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

4J

Request switch input (LH)

Request switch (LH)

Request switch (LH) is ON: Inspect for continuity to ground.

Continuity detected

Request switch (LH)

Request switch (LH) is OFF: 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

  • Trunk key cylinder switch

  • Related wiring harnesses

At the moment key cylinder is neutral position

5

4L

Request switch input (trunk lid)

Request switch (trunk lid)

Trunk lid request switch is ON: Inspect for continuity to ground.

Continuity detected

Request switch (trunk lid)

Trunk lid request switch is OFF: Inspect for continuity to ground.

No continuity

4N

Hazard output

Hazard warning light

Press the LOCK button (transmitter)

B+→1.0 or less→B+

  • Hazard warning light

  • Related wiring harnesses

Press the UNLOCK button (transmitter)

B+→1.0 or less→B+→1.0 or less→B+

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*2

Serial communication

Power window main switch

Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.

-

  • Power window main switch

  • 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+

4U

Horn on/off

Horn relay

Other

B+

  • Horn relay

  • Related wiring harnesses

Transmitter LOCK button is pressed twice within 5 s.

B+→1.0 or less→B+

4V

Hood switch signal

Hood switch

Hood open

(Hood latch switch off)

B+

  • Hood latch switch

  • Related wiring harnesses

Hood closed

(Hood latch switch on)

1.0 or less

4Y

Keyless buzzer output

Keyless buzzer

Keyless buzzer operated

B+

Keyless buzzer

Other

1.0 or less

4Z

HS-CAN+

PCM

Under any condition:

  • Inspect for continuity to PCM.

  • Inspect for continuity to instrument cluster.

Continuity detected

-

4AA

HS-CAN-

PCM

Under any condition:

  • Inspect for continuity to PCM.

  • Inspect for continuity to instrument cluster.

Continuity detected

-


*1
With immobilizer system
*2
With exterior open function (Power window system)


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