2001 TOYOTA SEQUOIA DLC3 Ts

± DIAGNOSTICSENGINE
DI±509
703 Author: Date:
2005 SEQUOIA (RM1146U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
Refer to DTC P0230 on page DI±179.
WIRING DIAGRAM
Refer to DTC P0230 on page DI±179.
INSPECTION PROCEDURE
1 Check fuel pump operation (See page SF±7).
OK Go to step 8.
NG
2 Connect hand±held tester, and check operation of fuel pump relay.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SPD.
CHECK:
Check the operation of the fuel pump relay when it is switched ON and OFF by the hand±held tester.
OK:
Operating noise can be heard from the relay.
OK Go to step 4.
NG
DID8L±01

B17418W E5
± DIAGNOSTICSENGINE
DI±513
707 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below.
MIL remains onStart inspection from step 1
MIL does not light upStart inspection from step 3
1 Clear DTC.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch ON.
(c) Read the DTC (See page DI±43).
(d) Clear the DTC (See page DI±43).
CHECK:
(a) Check that MIL does not light up.
OK:
Standard: MIL does not light up
OK Repair circuit indicated by output code
(See page DI±58).
NG
2 Check Harness and connector (Check for short in wire harness).
PREPARATION:
(a) Disconnect the E4 ECM connector.
(b) Turn the ignition switch ON.
CHECK:
(a) Check that MIL does not light up.
OK:
Standard: MIL does not light up
OK Replace ECM (See page SF±80).
NG
Check and repair harness and connector be-
tween combination meter and ECM.

DIDIK±01
D13871
Combination Meter
DLC3 Stop Light SwitchECM
Park/Neutral Position SwitchSpeed Sensor (SP2) Shift Solenoid Valve S1
Shift Solenoid Valve SR
Shift Solenoid Valve SLU
Shift Solenoid Valve SL2 ATF Temperature
Sensor No. 2Integration Control and Panel
(Shift Position L Switch)
MIL
Shift Solenoid Valve SL1
Shift Solenoid
Valve SLT
ATF Temperature
Sensor No.1
Shift Solenoid Valve S2
Speed Sensor (NT)

AT Oil Temp Warning LightShift Lever
(O/D Main Switch)
4WD:
4WD Control ECU
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±519
713 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDIL±01
D14205
Shift Solenoid Valve S1
MIL
(Malfunction Indicator Lamp) S1
S2
SL1
SL2
SLT
SLU
SR
WShift Solenoid Valve S2
Shift Solenoid Valve SL1
Shift Solenoid Valve SL2
Shift Solenoid Valve SLT
Shift Solenoid Valve SLU
Shift Solenoid Valve SR
OILW
AT Oil Temp Warning Light ECM Crankshaft Position Sensor
Engine CoolantTemperature Sensor
Combination Meter
Stop Lamp Switch Assy
DLC3
(Data Link Connector 3)THW VTA1, 2
VC
SPD
STPTH01
TC Throttle Position Sensor
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 1Mass Air Flow Meter
Accelerator Pedal Position SensorVPA
VPA2
Shift Lever
(O/D Main Switch)
Input Speed Sensor (NT)NT
Output Speed Sensor (SP2)SP2
TH02
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 2Skid Control ECUNSW
Park/Neutral Position Switch
R, D, 3, 2
VG
NE
L
ODMSIntegration Control and Panel
(Shift Position L Switch)
L4



: 4WD4WD Control ECU
CAN DI±520
± DIAGNOSTICSAUTOMATIC TRANSMISSION
714 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM
The configuration of the electronic control system in the A750E/A750F automatic transmission is as shown
in the following chart.

DIDIN±01
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freeze Frame Data (Precheck)
Record or Print DTC and Freeze Frame Data DI±565
Clear DTC and Freeze Frame Data DI±565
Visual Inspection
Setting the Check Mode Diagnosis DI±566
1
Items insideare titles of pages in this manual, with the
page number indicated in the bottom portion. See the indicated
pages for detailed explanations.
DI±523
Connect a hand±held tester to DLC3.
If the display shows ºUNABLE TO CONNECT TO VEHICLEº when you have connected the
scan tool/hand±held tester, inspect DLC3 DI±562
2
3
4
5
6
Symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
P.IN±24
Symptom occurs
DTC Check
DI±565OK Code
11Preliminary Check
DI±524
DTC Chart
DI±573
Mechanical System Test
DI±538 and DI±540
Manual Shifting Test
DI±542OK
OK
Chapter 1
(Electronic)Chapter 2
(On±Vehicle)
DI±553OKChapter 3
(Off±Vehicle)OK Matrix Chart of Problem Symptoms ± DI±553
Circuit
Inspection
NG
Parts Inspection
NG
NGNG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12
OK13
14
1516
17 9
10
DI±553DI±553
DI±576 to DI±691
18

O/D Main Switch Circuit Check

Shift Position L Switch Circuit Check DI±522
± DIAGNOSTICSAUTOMATIC TRANSMISSION
716 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING

DIDIP±01
12345678
9 10111213141516
D13649
DLC3:
CG
TC
D13654
DI±524
± DIAGNOSTICSAUTOMATIC TRANSMISSION
718 Author: Date:
2005 SEQUOIA (RM1146U)
BASIC INSPECTION
1. CHECK FLUID LEVEL
(a) Using SST, create a short±circuit between terminals TC
and CG of the DLC3.
SST 09843±18040
(b) Start the engine and run at idle.

The A/C switch must be turned off.

On models with active height control suspension &
adaptive variable suspension, turn the height con-
trol switch off.
(c) Slowly move the shift lever through all positions from P to
L, and move it back to the P position.
(d) Switch to the fluid temperature detection mode.
Move the shift lever from the N to the D position, or from
D to N, within 1.5 seconds. (Repeat this operation for 6 se-
conds or more.)
OK: The A/T OIL TEMP warning light comes on for 2
seconds and then goes off.
(e) Return the shift lever to the P position and disconnect ter-
minals TC and CG.
(f) Idle the engine to raise oil temperature.
(g) Lift up the vehicle immediately after the meter indicator
light (ATF temperature warning light) comes on.

The A/T OIL TEMP warning light indicates the ATF
temperature according to the following table.
ATF Temp.Less than optimized
temperatureOptimized temperatureMore than optimized
temperature
A/T OIL TEMP warning lightOFFONBlinking

D14139Overflow Plug
D14140
Refill Plug
12345678
9 10111213141516
D13649
DLC3:
CG
TC
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±529
723 Author: Date:
2005 SEQUOIA (RM1146U)
(4) Temporarily install the gasket and overflow plug.
Torque: 20 NVm (204 kgfVcm, 15 ftVlbf)
(5) Add the proper amount of ATF through the refill
hole.
NOTICE:
Refill amount differs depending on the related procedures
indicated below.
Related proceduresRefill amount
Removal and installation of oil pan1.7 liters (1.8 us qts, 1.5 lmp.qts)
Removal of transmission valve body
assy4.3 liters (4.5 us qts, 3.8 lmp.qts)
Removal of torque converter assy5.4 liters (5.7 us qts, 4.8 lmp.qts)
(6) Temporarily install the O±ring and refill plug.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(7) Lower down the vehicle.
(8) Using SST, create a short±circuit between terminals
TC and CG of the DLC3.
SST 09843±18040
(9) Start the engine and run at idle.
NOTICE:

The A/C switch must be turned off.

On models with active height control suspension &
adaptive variable suspension, turn the height control
switch off.
(10) Slowly move the shift lever from the P to the 2±L
position.
Return the shift lever to the P position.

D14141
12345678
9 10111213141516
D13649
DLC3:
CG
TC
D13654
DI±532
± DIAGNOSTICSAUTOMATIC TRANSMISSION
726 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Install the overflow plug with a new gasket when the
draining ATF has becomes a trickle.
Torque: 20 NVm (204 kgfVcm, 15 ftVlbf)
(4) Install the refill plug with a new O±ring.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(5) Lower down the vehicle.
(6) Turn the ignition switch off.
(7) Check for fluid leaks in the transmission.
If there are leaks, it is necessary to repair or replace O±rings,
FIPGs, oil seals, plugs or other related parts.
(d) When adding a minimum amount of fluid: [*4]
(1) Using SST, create a short±circuit between terminals
TC and CG of the DLC3.
SST 09843±18040
(2) Start the engine and run at idle.
NOTICE:
The A/C switch must be turned off.
(3) Slowly move the shift lever from the P to the 2±L
position. Return the shift lever to the P position.
(4) Switch to the fluid temperature detection mode.
Move the shift lever from the N to the D position, or
from D to N, within 1.5 seconds. (Repeat this opera-
tion for 6 seconds or more.)
OK: The A/T OIL TEMP warning light comes on for 2
seconds and then goes off.
(5) Disconnect terminals TC and CG after confirming
the above condition.
(6) Idle the engine to raise the fluid temperature.