TOYOTA HIGHLANDER 2001 Service Repair Manual

G31165
E10
Electronically Controlled
Transmission Solenoid
E8DSLECM
9
G3
DSLY-G+B
CPU
D25234
Transmission Wire Side:
(Connector Front View):
E10
DSL
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-979
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P2770: Range check (High resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Shift solenoid valve DSLON
Battery voltage8 V or more
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
P2769: Range check (Low resistance)
Shift solenoid valve DSL resistance8 W or less
P2770: Range check (High resistance)
Shift solenoid valve DSL resistance100 kW or more
COMPONENT OPERATING RANGE
Shift solenoid valve DSLResistance: 11 to 13 W at 20C (68F)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(DSL)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
3 - Body ground11 to 13 W
NG Go to step 3
OK

C82158C91565
DSL
E7E8E9E6E5
ECM:
G28385
(+) (-) Shift Solenoid Valve DSL:
05-980- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
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2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE - ECM)
(a) Connect the transmission wire connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
E8 - 9 (DSL) - Body ground11 to 13 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 01-36)
OK
REPLACE ECM (SEE PAGE 10-9)
3 INSPECT SHIFT SOLENOID VALVE(DSL)
(a) Remove the shift solenoid valve DSL.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
Solenoid Connector (DSL) - Solenoid
Body (DSL)11 to 13 W
(c) Connect positive (+) lead to the terminal of solenoid con-
nector, negative (-) lead to the solenoid body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(DSL)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40-34)

- DIAGNOSTICSCRUISE CONTROL SYSTEM
05-2155
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0571/52 STOP LIGHT SWITCH CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop lamp switch assy sends a signal to the ECM. When the ECM
receives this signal, it cancels the cruise control.
Fail-safe function operates to enable normal driving even if there is a malfunction in the stop lamp signal
circuit.
The cancel condition occurs when positive battery voltage is applied to terminal STP.
When the brake is applied, battery positive voltage is normally applied to terminal STP of the ECM through
the STOP fuse and the stop lamp switch assy, and the ECM turns the cruise control off.
DTC No.DTC Detection ConditionTrouble Area
P0571/52
The malfunction code is output when the voltage of the STP
terminal and that of the ST1- terminal on the ECM are less
than 1 V for 0.5 sec. or more.
Stop lamp switch assy

Stop lamp switch assy circuit

ECM
05IQX-02

I39315
S15
STOP LAMP SWITCH
Passenger Side J/B
Instrument Panel J/B
Passenger Side J/B
F7
FL BLOCKI15
IGNITION SW J3 *1
J6 *2
J/CECM
ST1-
STP
STOP
IGN
IG2 AM2
ALT AM2
FL MAIN
BATTERYWL-YY
GR W Y PP
B
BR V
E6 12
E6 19
4M12
4L3
14
23 E E
4E1
4M4
1G6 1E1
1C1 1A1
B
IC11
76 10
2 1
*1: 3MZ-FE
*2: 2AZ-FE 05-2156
- DIAGNOSTICSCRUISE CONTROL SYSTEM
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WIRING DIAGRAM

I04062
Free Pushed in
3 41 2@
- DIAGNOSTICSCRUISE CONTROL SYSTEM
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INSPECTION PROCEDURE
1 READ VALUE OF HAND-HELD TESTER
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to the ON position, and turn the hand-held tester main switch on.
(c) Select the item ºSTP LIGHT SW2-Mº, ºSTP LIGHT SW2-Sº or ºSTP LIGHT SW1-Sº in the DATA LIST,
and read its value displayed on the hand-held tester.
(d) Check that the stop lamp comes on when the brake pedal is depressed, and goes off when the brake
pedal is released.
ECM:
ItemMeasurement Item /
Display (Range)Normal ConditionDiagnostic Note
STP LIGHT SW2-MStop lamp SW signal (Main CPU) /
ON or OFFON : Brake pedal depressed
OFF : Brake pedal released-
STP LIGHT SW2-SStop lamp SW signal (Sub CPU) /
ON or OFFON : Brake pedal depressed
OFF : Brake pedal released-
STP LIGHT SW1-SStop lamp SW signal (Sub CPU) /
ON or OFFON : Brake pedal depressed
OFF : Brake pedal released-
OK:
When brake pedal operation is performed, the standard values will be above.
NG Go to step 2
OK
REPLACE ECM (SEE PAGE 10-24)
2 INSPECT STOP LAMP SWITCH ASSY
(a) Disconnect the stop lamp switch assy connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Switch conditionTester connectionSpecified value
Switch pin free1 - 2Below 1 W
Switch pin free3 - 410 kW or higher
Switch pin pushed in1 - 210 kW or higher
Switch pin pushed in3 - 4Below 1 W
NG REPLACE STOP LAMP SWITCH ASSY
OK

I39310
Stop Lamp Switch Wire Harness Side
Connector Front View:
S15
I36982
Wire Harness View:
E6
ST1
STP
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- DIAGNOSTICSCRUISE CONTROL SYSTEM
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3 CHECK HARNESS AND CONNECTOR
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
S15-2 - Body groundAlways10 to 16 V
S15-3 - Body groundIgnition SW ON10 to 16 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (STOP LAMP SWITCH - BAT-
TERY)
OK
4 INSPECT ECM
(a) Reconnect the stop lamp switch connector.
(b) Disconnect the E6 connector from the ECM.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage according to the value(s) in the table
below.
Standard:
Pedal conditionTester connectionSpecification
DepressedE6-19 (STP) -
Body ground10 to 16 V
ReleasedE6-19 (STP) -
Body groundBelow 1 V
DepressedE6-12 (ST1-) -
Body groundBelow 1 V
ReleasedE6-12 (ST1-) -
Body ground10 to 16 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (STOP LAMP SWITCH - ECM)
OK
REPLACE ECM (SEE PAGE 10-24)

- DIAGNOSTICSCRUISE CONTROL SYSTEM
05-2159
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0607/54 INPUT SIGNAL CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
This DTC indicates the internal abnormalities of the ECM.
DTC No.Detection ItemTrouble Area
P0607/54
The ECM has a supervisory CPU and a control ECU inside.
When each input STP signal is different for 0.15 sec. or more,
this trouble code is output.
This trouble code is output after 0.4 sec. has passed from the
time the cruise cancel input signal (STP input) is input into the
ECM.

ECM
HINT:
The ECM receives signals from each sensor to control all the functions of the cruise control with the micro-
computer.
When a trouble code is detected, fail-safe remains on until the ignition switch is turned off.
INSPECTION PROCEDURE
1 REPLACE ECM (SEE PAGE 10-24)
05B34-05

05-928- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
111 8 Author
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:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0710 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT
DTC P0712 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT LOW INPUT
DTC P0713 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance
value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1 (THO).
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes high-
er, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down
as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC No.DTC Detection ConditionTrouble Area
P0710
(a) and (b) is detected momentary within 0.5 sec. when neither
P0712 or P0713 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0712ATF temperature sensor resistance is less than 79 W for 0.5
sec. or more (1-trip detection logic)
Short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0713
ATF temperature sensor resistance is more than 156 kW when
15 minutes or more after the engine start
DTC is detected for 0.5 sec. or more (1-trip detection logic)
Open in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than
79
W*1 or more than 156 kW*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will
turn on the MIL and store the DTC.
*1: 150C (302F) or more is indicated regardless of the actual ATF temperature.
*2: -40C (-40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or hand-held tester display.
0527N-31

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-929
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MONITOR STRATEGY
Related DTCs
P0710: ATF temperature sensor/Range check (Fluttering)
P0712: ATF temperature sensor/Range check (Low resistance)
P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
P0710: Range check (Fluttering)
P0712: Range check (Low resistance)
The monitor will run whenever these DTCs are not present.See page 05-895
The typical enabling condition is not available.-
P0713: Range check (High resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Time after engine start15 min. or more
TYPICAL MALFUNCTION THRESHOLDS
P0710: Range check (Fluttering)
TFT (transmission fluid temperature) sensor
Less than 79 W
or
More than 156 kW
P0712: Range check (Low resistance)
TFT (transmission fluid temperature) sensorLess than 79 W
P0713: Range check (High resistance)
TFT (transmission fluid temperature) sensorMore than 156 kW
COMPONENT OPERATING RANGE
TFT (transmission fluid temperature)Atmospheric temperature - approx. 130C (266F)

G30836G32447
THOE2
BR
E828
32 6 E10
Electronically Controlled
Transmission Solenoid
E7 O
1 O G-YECM
E2
THO5V BR
S28 S2955 Short Connector 05-930
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1120 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM