POWER LIFTGATE (PLG) CONTROL MODULE INSPECTION

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1. Measure the PLG control module terminal voltage.

2. If there is large difference between the measured value and the value in the terminal voltage table, inspect the parts under “Inspection item(s)” and related wiring harnesses.

  • If the system does not work properly even though the inspection items or related wiring harnesses do not have any malfunction, replace the PLG control module.

Terminal Voltage Table (Reference)

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Terminal | Signal name | Connected to | Measurement condition | Voltage (V)/Continuity | Inspection item(s)
--- | --- | --- | --- | --- | ---
1A | Closure motor (Closed) | Closure motor | After opening the liftgate, operate the closure motor with the liftgate half-closed | 0 → B+→ 0 | • Liftgate latch and lock actuator ― Latch position switch ― Closure motor
1B | Closure motor (Open) | Closure motor | Open the fully closed liftgate by hand | 0 → B+→ 0 | • Liftgate latch and lock actuator ― Latch position switch ― Closure motor • Liftgate outer handle switch
1C | Power supply | P.LIFT GATE 20 A fuse | Under any condition | B+ | P.LIFT GATE 20 A fuse
1D | GND | Body ground | Under any condition | 1.0 or less | • Related wiring harnesses
1E | PLG motor (Open) | PLG motor | Open the fully closed liftgate | 0 → B+→ 0 | PLG drive unit
1F | PLG motor (Closed) | PLG motor | Close the fully opened liftgate | 0 → B+→ 0 | PLG drive unit
2A | IG1 | METER-B 7.5 A fuse | Ignition switch is at ON position | B+ | METER-B 7.5 A fuse
Ignition switch is at OFF or ACC position | 1.0 or less
2B | PLG rear switch signal | PLG rear switch | When operating the PLG rear switch | B+ | PLG rear switch
When not operating the PLG rear switch | 1.0 or less
2C | PLG buzzer output | PLG buzzer | When the PLG buzzer is sounding | B+ | PLG buzzer
Other | 1.0 or less
2D | PLG touch sensor GND | Body ground | Under any condition | 1.0 or less | • Related wiring harnesses
2G | Clutch output (-) | PLG clutch | When PLG is open or closing | 1.0 or less | PLG drive unit
Other | No Continuity
2I | Clutch output (+) | PLG clutch | When PLG is open or closing | B+ | PLG drive unit
Other | 1.0 or less
2J | PLG motor rotation signal A | Rotation sensor | Pulse signal | - | PLG drive unit
2K | Rotation signal power source | Rotation sensor | Under any condition | 5 | PLG drive unit
2L | PLG motor rotation signal B | Rotation sensor | Pulse signal | - | PLG drive unit
2N | Rotation sensor GND | Body ground | Under any condition | 1.0 or less | • Related wiring harnesses
2O | Power supply | BCM | Under any condition | B+ | BCM
3A | PLG touch sensor signal (RH) | PLG touch sensor (RH) | When sensor is operating normally (usually) | 0.5—4.2 or less | PLG touch sensor (RH)
When sensor is at fault | Other than those above
3B | PLG touch sensor signal (LH) | PLG touch sensor (LH) | When sensor is operating normally (usually) | 0.5—4.2 or less | PLG touch sensor (LH)
When sensor is at fault | Other than those above
3C | Lock signal | Passenger seat side lock link switch | Passenger-side door locked | 1.0 or less | Passenger seat side lock link switch
Passenger-side door unlocked | Wave pattern (See Pattern 1.)
3E | Motor return signal | Return switch | After opening the liftgate, operate the closure motor with the liftgate half-closed | 1.0 or less | • Liftgate latch and lock actuator ― Return switch
3F | Liftgate latch switch signal | Liftgate latch switch | Liftgate is open (liftgate latch switch is ON) | 1.0 or less | Liftgate latch and lock actuator
Liftgate is closed (liftgate latch switch is OFF) | B+
3G | Full latch switch | Latch position switch | After opening the liftgate, operate the closure motor with the liftgate half-closed | 1.0 or less→ B+→ 1.0 or less | • Liftgate latch and lock actuator ― Latch position switch ― Closure motor
3H | Half latch switch | Latch position switch | After opening the liftgate, operate the closure motor with the liftgate half-closed | 1.0 or less→ B+ | • Liftgate latch and lock actuator ― Latch position switch ― Closure motor
3N*1 | Unlock signal | Passenger seat side lock link switch | Passenger-side door locked | Wave pattern (See Pattern 2.) | Passenger seat side lock link switch
Passenger-side door unlocked | 1.0 or less
3O | Liftgate outer handle switch signal | Liftgate outer handle switch | When operating the liftgate outer handle (When the liftgate outer handle switch is ON) | B+ | Liftgate outer handle switch
When not operating the liftgate outer handle (When the liftgate outer handle switch is OFF) | 1.0 or less
3Q | PLG front switch signal (Input) | PLG front switch | PLG front switch: Switch is at ON | B+ | PLG front switch
PLG front switch: Switch is at OFF | 1.0 or less
3R | Power supply to PLG switches | PLG switch | PLG front switch: Open or close switch is at ON | 1.0 or less | PLG control module
PLG front switch: Open or close switch is at OFF | B+
3U | CAN_L | - | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible | -
3V | CAN_H | - | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible | -

*1 :When checking the operation of UNLOCK signal, position the rear door lock knobs of both sides at LOCK.

Generated pulse (reference)

Pattern 1

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  • Terminal: 3C (+) ↔ body ground (-)
  • Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Pattern 2

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  • Terminal: 3N (+) ↔ body ground (-)
  • Oscilloscope setting: 1 V/DIV (Y), 1 ms/DIV (X), DC range