Flowchart No. 6
Power Seat Rear Up-down Switch:
Check for voltage between the seat
control unit 16P connector B3 and
B16 terminals with the rear up-
down switch pushed up. Check for
voltage between the seat control
unit 16P connector B11 and B16
terminals with the rear up-down
switch pushed down.
There should be 1 V or less with
the switch pushed and 4 V or more
with the switch in the neutral posi-
tion.
Are voltages as specified?
NO
• Open or short in the wires
• Faulty rear up-down switch
• Faulty seat control unit
YES
Power Seat Rear Up-down Motor:
Disconnect the 2P connector from
the driver's power seat rear up-
down motor. Check for voltage
between the driver's power seat
rear up-down motor 2P connector
No. 1 terminal and body ground
with the rear up-down switch
pushed up. Check for voltage
between the driver's power seat
rear up-down motor 2P connector
No. 2 and body ground with the
rear up-down switch pushed
down. There should be 10 V or
more with the switch pushed and
O V with the switch in the neutral
position.
Are voltages as specified?
NO
• Open or short in the wires
• Faulty rear up-down switch
• Faulty seat control unit
Test the driver's power seat rear
up-down motor (see page
23-228
).
Does the motor run smoothly
and without noise?
• Open or short in the GRN or
BRU/GRN wire between motor
and the 2P connector.
• Faulty rear up-down motor
NO
YES
Check for voltage between the
seat control unit 16P connector
B9 terminal and 12P connector
A4 terminal while operating the
rear up-down motor upward and
downward.
NOTE: All DPMS connectors must
be connected.
• Open or short in the wires
• Faulty rear up-down position
sensor
• Faulty seat control unit
NO
Does the voltage pulse between
1 V or less and 5 V or more with
the rear up-down motor running?
YES
Substitute a known-good seat
control unit, and recheck. If the
systems now work OK, replace
the original seat control unit.
SEAT CONTROL UNIT
16P CONNECTOR "B"
SEAT CONTROL UNIT
12P CONNECTOR "A"
NOTE: All connector views are from wire side
of female terminals.
SEAT CONTROL UNIT
16P CONNECTOR "B"
DRIVER'S POWER SEAT
REAR UP-DOWN MOTOR
2P CONNECTOR
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