POSITION MEMORY CONTROL MODULE INSPECTION


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1.  Measure the voltage at each terminal is as indicated in the Terminal Voltage Tables.

•  If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under “Inspection item (s)” and related wiring harnesses.

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


Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measured condition

Voltage (V)

Inspection item (s)

1A
Keyless entry signal
BCM
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
•  BCM
•  Related wiring harness
1D
Vehicle speed input
Instrument cluster
Measure the waveform while driving using the oscilloscope.
High output: B+
•  Instrument cluster
•  Related wiring harness
Low output: 1.0 or less
1F
Door open/closed
Front door latch and lock actuator (Door close on)
Driver-side door open: Inspect for continuity to ground.
B+
•  Front door latch and lock actuator (Door close on)
•  Related wiring harness
Driver-side door closed: Inspect for continuity to ground.
1.0 or less
1G
IG2
HEATER 10 A fuse
Switch the ignition to ON
B+
•  HEATER 10 A fuse
•  Related wiring harness
Switch the ignition to off or ACC
1.0 or less
1H
Signal GND
Body ground
Under any condition
1.0 or less
Related wiring harness
1J
Power GND
Body ground
Under any condition
1.0 or less
Related wiring harness
1M
Power supply
ROOM 15 A fuse
Under any condition
B+
•  ROOM 15 A fuse
•  Related wiring harness
1O
Power supply
P SEAT 30 A fuse
Under any condition
B+
•  P SEAT 30 A fuse
•  Related wiring harness
2A
Slide switch input (forward)
Power seat switch
Press the slide switch to forward
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2B
Slide switch input (backward)
Power seat switch
Press the slide switch to backward
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2C
Front tilt switch input (up)
Power seat switch
Press the front tilt switch to up
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2D
Front tilt switch input (down)
Power seat switch
Press the front tilt switch to down
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2E
Rear tilt switch input (up)
Power seat switch
Press the rear tilt switch to up
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2F
Rear tilt switch input (down)
Power seat switch
Press the rear tilt switch to down
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2G
Recliner switch input (forward)
Power seat switch
Press the recliner switch to forward
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2H
Recliner switch input (backward)
Power seat switch
Press the recliner switch to backward
1.0 or less
•  Power seat switch
•  Related wiring harness
Other
5.0
2I
Signal GND input
Power seat switch
Under any condition
1.0 or less
•  Power seat switch
•  Related wiring harness
2J
Signal GND input
Position memory switch
Under any condition
1.0 or less
•  Position memory switch
•  Related wiring harness
2K
Set switch input
Position memory switch
Press the set switch
1.0 or less
•  Position memory switch
•  Related wiring harness
Other
5.0
2L
Memory switch 1 input
Position memory switch
Press the memory switch 1
1.0 or less
•  Position memory switch
•  Related wiring harness
Other
5.0
2M
Memory switch 2 input
Position memory switch
Press the memory switch 2
1.0 or less
•  Position memory switch
•  Related wiring harness
Other
5.0
2N
Memory switch 3 input
Position memory switch
Press the memory switch 3
1.0 or less
•  Position memory switch
•  Related wiring harness
Other
5.0
3A
Slide motor output (forward)
Slide motor
While slide motor is moving to forward
B+
•  Slide motor
•  Related wiring harness
Other
1.0 or less
3B
Slide motor output (backward)
Slide motor
While slide motor is moving to backward
B+
•  Slide motor
•  Related wiring harness
Other
1.0 or less
3C
Front tilt motor output (up)
Front tilt motor
While front tilt motor is moving to up
B+
•  Front tilt motor
•  Related wiring harness
Other
1.0 or less
3D
Front tilt motor output (down)
Front tilt motor
While front tilt motor is moving to down
B+
•  Front tilt motor
•  Related wiring harness
Other
1.0 or less
3E
Rear tilt motor output (up)
Rear tilt motor
While rear tilt motor is moving to up
B+
•  Rear tilt motor
•  Related wiring harness
Other
1.0 or less
3F
Rear tilt motor output (down)
Rear tilt motor
While rear tilt motor is moving to down
B+
•  Rear tilt motor
•  Related wiring harness
Other
1.0 or less
3G
Recliner motor output (forward)
Recliner motor
While recliner motor is moving to forward
B+
•  Recliner motor
•  Related wiring harness
Other
1.0 or less
3H
Recliner motor output (backward)
Recliner motor
While recliner motor is moving to backward
B+
•  Recliner motor
•  Related wiring harness
Other
1.0 or less
3I
Position sensor (slide)+
Position sensor (slide)
Slide motor is operation (When the vehicle is stopped)
9.4
•  Position sensor (slide)
•  Related wiring harnesses
Slide motor is not operation (When the vehicle is stopped)
1.0 or less
3J
Position sensor (slide)-
Position sensor (slide)
Slide motor is operation (When the vehicle is stopped)
Wave pattern (SeeGenerated pulse (reference))
•  Position sensor (slide)
•  Related wiring harnesses
Slide motor is not operation (When the vehicle is stopped)
1.0 or less
3L
Position sensor (tilt)-
Position sensor (tilt)
Front tilt motor is operation (When the vehicle is stopped)
Wave pattern (See Generated pulse (reference).)
•  Position sensor (tilt)
•  Related wiring harnesses
Front tilt motor is not operation (When the vehicle is stopped)
1.0 or less
3N
Position sensor (lift)-
Position sensor (lift)
Rear tilt motor is operation (When the vehicle is stopped)
Wave pattern (See Generated pulse (reference).)
•  Position sensor (lift)
•  Related wiring harnesses
Rear tilt motor is not operation (When the vehicle is stopped)
1.0 or less
3P
Position sensor (reclining)-
Position sensor (reclining)
Recliner motor is operation (When the vehicle is stopped)
Wave pattern (SeeGenerated pulse (reference).)
•  Position sensor (reclining)
•  Related wiring harnesses
Recliner motor is not operation (When the vehicle is stopped)
1.0 or less


Generated pulse (reference)


Wave pattern

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•  Terminal:
―  Position sensor (slide) signal:3J (+) ↔ body ground (-)
―  Position sensor (tilt) signal:3L (+) ↔ body ground (-)
―  Position sensor (lift) signal:3N (+) ↔ body ground (-)
―  Position sensor (reclining) signal:3P (+) ↔ body ground (-)
•  Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range