Driving Position Memory System (Door Multiplex Control Unit and Power Seat Control Unit) Input Test
NOTE:
SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service.
Make sure the fuses associated with the system is OK.
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

Power Seat Control Unit

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
Disconnect the power seat control unit connectors.
Power Seat Control Unit Connector A (20P) (female terminals):
Power Seat Control Unit Connector B (12P) (female terminals):
3.
Inspect the connectors and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals look OK, go to step 4.

4.
Reconnect the connectors to the power seat control unit, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
A13
PNK
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
A11
BLU
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
B6
LT BLU
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
B12
PNK
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
B2
GRY
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
B5
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
A20
GRN
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
A1
PUR
Shift position/mode in P
Check for continuity to ground:
There should be continuity.
Faulty transmission range switch
An open or high resistance in the wire
Shift position/mode in any other than P
Check for continuity to ground:
There should be no continuity.
Faulty transmission range switch
A short to ground in the wire
A6
PUR
Vehicle ON mode
Measure the voltage to ground:
There should be at least about 10 V.
Faulty position sensor
A short to ground in the wire
A10
?
A19
RED
?
ORN
Run the recline motor
Measure the voltage between terminals A10 (?) and A19 (?):
There should be about 2.5 V average.
Faulty position sensor
An open or high resistance in the wire
A short to ground in the wire
A8
?
A19
BRN
?
ORN
Run the slide motor
Measure the voltage between terminals A8 (?) and A19 (?):
There should be about 2.5 V average.
Faulty position sensor
An open or high resistance in the wire
A short to ground in the wire
A7
?
A19
PNK
?
ORN
Run the front up-down motor
Measure the voltage between terminals A7 (?) and A19 (?):
There should be about 2.5 V average.
Faulty position sensor
An open or high resistance in the wire
A short to ground in the wire
A9
?
A19
YEL
?
ORN
Run the rear up-down motor
Measure the voltage between terminals A9 (?) and A19 (?):
There should be about 2.5 V average.
Faulty position sensor
An open or high resistance in the wire
A short to ground in the wire

5.
Turn the vehicle to the OFF (LOCK) mode.

6.
Disconnect the connectors from the power seat control unit, and do these input tests at the following connectors:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 7.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
B3
?
B1
YEL
?
WHT
Under all conditions
Connect terminals B6 and B3, and terminals B1 and B2:
The seat should slide forward.
Faulty slide motor
An open or high resistance in the wire
Connect terminals B6 and B1, and terminals B3 and B2:
The seat should slide backward.
B8
?
B11
GRY
?
YEL
Under all conditions
Connect terminals B12 and B8, and terminals B11 and B5:
The seat should recline forward.
Faulty recline motor
An open or high resistance in the wire
Connect terminals B12 and B11, and terminals B8 and B5:
The seat should recline backward.
B10
?
B7
ORN
?
YEL
Under all conditions
Connect terminals B6 and B10, and terminals B7 and B2:
The front of seat should move up.
Faulty front up-down motor
An open or high resistance in the wire
Connect terminals B6 and B7, and terminals B10 and B2:
The front of seat should move down.
B9
?
B4
GRN
?
WHT
Under all conditions
Connect terminals B12 and B9, and terminals B4 and B5:
The rear of seat should move up.
Faulty rear up-down motor
An open or high resistance in the wire
Connect terminals B12 and B4, and terminals B9 and B5:
The rear of seat should move down.
Door Multiplex Control Unit (Power Window Master Switch)

7.
Turn the vehicle to the OFF (LOCK) mode.

8.
Disconnect the power window master switch 37P connector.
Power Window Master Switch 37P Connector (female terminals)

9.
Inspect the connector and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals look OK, go to step 10.
10.
Reconnect the connector to the power window master switch, do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 11.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
37
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
3
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
29
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
5
GRY
Vehicle ON mode, POSITION 1 button pressed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driving position memory switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, POSITION 1 button released
Measure the voltage to ground:
There should be about 5 V.
Faulty driving position memory switch
A short to ground in the wire
6
RED
Vehicle ON mode, POSITION 2 button pressed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driving position memory switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, POSITION 2 button released
Measure the voltage to ground:
There should be about 5 V.
Faulty driving position memory switch
A short to ground in the wire
17
YEL
Vehicle ON mode, SET button pressed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driving position memory switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, SET button released
Measure the voltage to ground:
There should be about 5 V.
Faulty driving position memory switch
A short to ground in the wire

11.
Turn the vehicle to the OFF (LOCK) mode.

12.
Disconnect the connector from the power window master switch, do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 13.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
22
PUR
Under all conditions
Connect terminals No. 22 and No. 37 with a jumper wire:
The driving position memory switch INDICATOR 1 should come on.
Faulty LED
Faulty driving position memory switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
24
GRN
Under all conditions
Connect terminals No. 24 and No. 37 with a jumper wire:
The driving position memory switch INDICATOR 2 should come on.
Faulty LED
Faulty driving position memory switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
30
PNK
Under all conditions
Connect terminals No. 30 and No. 37 with a jumper wire:
The driving position memory switch lights should come on.
Faulty LED
Faulty driving position memory switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire

13.
If multiple failures are found on more than one control unit, replace the power seat control unit. If input failures are related to a particular control unit, replace the control unit.