Page 297 of 3383
AT-222
A/T SHIFT LOCK SYSTEM
Revision: November 20092006 QX56
Wiring Diagram — A/T — SHIFTECS00ENW
BCWA0502E
Page 298 of 3383

A/T SHIFT LOCK SYSTEMAT-223
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
Shift Lock Control Unit Reference ValuesECS00ENX
SHIFT LOCK HARNESS CONNECTOR TERMINALS LAYOUT
SHIFT LOCK CONTROL UNIT INSPECTION TABLE
Data are reference values.
NOTE:
Confirm that the pointer swings only momentarily because the output time is so short. If the inspection is done with an oscillo scope, it
should be observed that the power source voltage lasts for 3.5 to 10 ms.
WCIA0550E
TER-
MINAL NO. WIRE
COLOR ITEM
CONDITION VOLTAGE
(Approx.)
1Y/RPower source Ignition switch:
“ON ” Battery voltage
Ignition switch: “OFF ” Battery voltage
2L/R Detention switch (for
key) When selector lever is not in "P" position with key inserted. Battery voltage
Except the above
0V
3GR Detention switch (for
shift) When selector lever is not in "P" position
Battery voltage
Except the above 0V
4 R/G Stop lamp switch When brake pedal is depressed
Battery voltage
When brake pedal is released 0V
5 W/R Vehicle speed signal ——
6 G/R Ignition signal Ignition switch:
“OFF ” 0V
Ignition switch: “ON ” Battery voltage
7 R/W Shift lock solenoid When brake pedal is depressed with ignition switch "ON". 0V
When brake pedal is depressed.
Battery voltage
8 B Ground Always0V
9 G/W Key lock solenoid When the selector lever is set to a position other than the “
P”
position, and the key switch is turned from “ON ” to “OFF ” Battery voltage for
approx. 0.1 sec.
(Note)
Except the above 0V
10 W/G Key unlock solenoid When ignition switch is not in "ON
” position with key inserted. Battery voltage for
approx. 0.1 sec.
(Note)
Except the above 0V
Page 299 of 3383

AT-224
A/T SHIFT LOCK SYSTEM
Revision: November 20092006 QX56
Component InspectionECS00ENY
SHIFT LOCK SOLENOID
Check operation by applying battery voltage to A/T device termi-
nal 9 and ground to terminal 10.
CAUTION:
Be sure to apply the voltage of the correct polarity to the
respective terminals. Otherwise, the part may be damaged.
DETENTION SWITCH
For key:
Check continuity between terminals of the A/T device.
DETENTION SWITCH
For shift:
Check continuity between terminals of the A/T device.
KEY LOCK SOLENOID
Key lock
Check operation by applying battery voltage to key switch and
key lock solenoid terminal 1 and ground to terminal 2.
CAUTION:
Be careful not to cause burnout of the harness.
LCIA0328E
Condition Terminal No. Continuity
When selector lever is “ P” position.
5 - 6No
When selector lever is not “P ” position. Yes
LIIA1599E
ConditionTerminal No. Continuity
When selector lever is “P ” position.
3 - 4No
When selector lever is not “P ” position. Yes
WCIA0401E
WCIA0240E
Page 300 of 3383
A/T SHIFT LOCK SYSTEMAT-225
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
Key unlock
Check operation by applying battery voltage to key switch and
key lock solenoid terminal 2 and ground to terminal 1.
CAUTION:
Be careful not to cause burnout of the harness.
KEY SWITCH
Check continuity between terminals of the key switch and key
lock solenoid.
STOP LAMP SWITCH
Check continuity between terminals of the stop lamp switch har-
ness connector.
Check stop lamp switch after adjusting brake pedal.
WCIA0241E
Condition Terminal No. Continuity
Key inserted 3 - 4Ye s
Key withdrawn No
SCIA5662E
ConditionTerminal No. Continuity
When brake pedal is depressed 3 - 4Ye s
When brake pedal is released No
WCIA0559E
Page 301 of 3383
AT-226
SHIFT CONTROL SYSTEM
Revision: November 20092006 QX56
SHIFT CONTROL SYSTEMPFP:34901
Control Device Removal and InstallationECS00ENZ
1. Select lever knob2. A/T console finisher3. Control device assembly
4. Position lamp 5. A/T selector control cable6. Lock plate
LCIA0348E
Page 302 of 3383

SHIFT CONTROL SYSTEMAT-227
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
REMOVAL
1. Remove negative battery terminal. Refer to SC-4, "BATTERY" .
2. Remove A/T finisher. Refer to IP-13, "
A/T FINISHER" .
3. Disconnect selector control cable.
4. Disconnect A/T device harness connector.
5. Remove control device assembly.
INSTALLATION
Installation is in reverse order of removal. Be careful of the following:
After installation is completed, adjust and check A/T position.
Adjustment of A/T PositionECS00EO0
1. Loosen nut of control cable.
2. Place PNP switch and selector lever in “P” position.
3. After pushing the control cable in the direction shown with a force of 9.8 N ·m (1kg-m, 2.2 lb-ft), release it. This is in the natu-
ral state, tighten control cable nut to specifications.
Checking of A/T PositionECS00EO1
1. Place selector lever in “P” position, and turn ignition switch ON
(engine stop).
2. Make sure selector lever can be shifted to other than “P” posi-
tion when brake pedal is depressed. Also make sure selector
lever can be shifted from “P” position only when brake pedal is
depressed.
3. Move the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm the selector lever stops at each position with the feel of engagement when it is moved through all the positions. Check
whether or not the actual position the selector lever is in
matches the position shown by the shift position indicator and
the transmission body.
5. The method of operating the lever to individual positions correctly should be as shown.
6. Confirm the back-up lamps illuminate only when lever is placed in the “R” position. Confirm the back-up
lamps does not illuminate when selector lever is pushed against “R” position in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in the “P” and “N” positions.
8. Make sure transmission is locked completely in “P” position.
Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
LCIA0345E
LCIA0325E
Page 303 of 3383
AT-228
ON-VEHICLE SERVICE
Revision: November 20092006 QX56
ON-VEHICLE SERVICEPFP:00000
Oil PanECS00EPZ
REMOVAL AND INSTALLATION
Removal
1. Drain A/T fluid. Refer to AT- 1 2 , "Changing Automatic Transmission Fluid (ATF)" .
2. Remove oil pan and gasket.
3. Check foreign materials in oil pan to help determine cause of malfunction. If the A/T fluid is very dark, has some burned smell, or contains foreign particles, friction material (clutches, band) may need replacement.
A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and
clutches to stick and can inhibit pump pressure.
CAUTION:
If friction material is detected, flush the transmission cooler after repair. Refer to AT- 1 4 , "
A/T Fluid
Cooler Cleaning" .
4. Remove magnets from oil pan.
Installation
1. Install the oil pan magnets as shown.
SCIA2308E
SCIA5200E
SCIA5200E
Page 304 of 3383
ON-VEHICLE SERVICEAT-229
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
2. Install the oil pan and new oil pan gasket.
CAUTION:
Do not reuse the oil pan gasket.
Completely remove all moisture, oil and old gasket from
the oil pan gasket mating surfaces and holes.
Always replace the oil pan bolts as they are self-sealing.
Be sure the oil pan drain plug hole is located to the rear
of the transmission assembly.
Partially install the oil pan bolts in a criss-cross pattern to
prevent dislocation of the gasket.
Be careful not to pinch harnesses.
3. Tighten new oil pan bolts in numerical order as shown.
4. Install drain plug in oil pan with new gasket. CAUTION:
Do not reuse the drain plug gasket.
5. Refill the transmission assembly with fluid. Refer to AT- 1 2 , "
Changing Automatic Transmission Fluid
(ATF)" .
SCIA2308E
Oil pan bolts : 7.9 N·m (0.81 kg-m, 70 in-lb)
SCIA4113E
Drain plug : 34 N·m (3.5 kg-m, 25 ft-lb)