TOYOTA HIGHLANDER 2001 Service Repair Manual

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-971
1161 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0982 SHIFT SOLENOID ºDº CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE S4)
DTC P0983 SHIFT SOLENOID ºDº CONTROL CIRCUIT
HIGH (SHIFT SOLENOID VALVE S4)
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ºONº and ºOFFº operation of the shift solenoid
valves SL1 and SL2 which is controlled by the ECM. If an open or short circuit occurs in either of the shift
solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be oper-
ated smoothly (Fail safe function).
DTC No.DTC Detection ConditionTrouble Area
P0982ECM detects short in solenoid valve S4 circuit 2 times when
solenoid valve S4 is operated (1-trip detection logic)
Short in shift solenoid valve S4 circuit

Shift solenoid valve S4

ECM
P0983ECM detects open in solenoid valve S4 circuit 2 times when
solenoid valve S4 is not operated (1-trip detection logic)
Open in shift solenoid valve S4 circuit

Shift solenoid valve S4

ECM
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. When there is an open or
short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and
stores the DTC. And the ECM performs the fail-safe function and turns the other shift solenoid valves in good
condition ºON/OFFº (In case of an open or short circuit, the ECM stops sending current to the circuit.)
(see page 05-916).
MONITOR STRATEGY
Related DTCsP0982: Shift solenoid valve S4/Range check (Low resistance)
P0983: Shift solenoid valve S4/Range check (High resistance)
Required sensors/ComponentsShift solenoid valve S4
Frequency of operationContinuous
Duration0.064 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
P0982: Range check (Low resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Shift solenoid valve S4ON
Battery voltage8 V or more
Ignition switchON
StarterOFF
P0983: Range check (High resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Shift solenoid valve S4OFF
Battery voltage8 V or more
Ignition switchON
StarterOFF
05C17-23

G31165
E10
Electronically Controlled
Transmission SolenoidECM
11
E8S4
8 RL
S4+B
CPU
D25234S4
Transmission Wire Side:
(Connector Front View):
E10
05-972- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1162 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TYPICAL MALFUNCTION THRESHOLDS
P0982: Range check (Low resistance)
Shift solenoid valve S4 resistance8 W or less
P0983: Range check (High resistance)
Shift solenoid valve S4 resistance100 kW or more
COMPONENT OPERATING RANGE
Shift solenoid valve S4Resistance: 11 to 15 W at 20C (68F)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(S4)
(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)
8 - Body ground11 to 15 W
NG Go to step 3
OK

C82158C82158C91565
S4
E7E8E9E6E5
ECM:
G28386
Shift Solenoid Valve S4:
(+) (-)
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-973
1163 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE - ECM)
(a) Connect the transmission connector to the transaxle.
(b) Disconnect the connector from the ECM.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
E8 - 11 (S4) - Body ground11 to 15 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 01-36)
OK
REPLACE ECM (SEE PAGE 10-9)
3 INSPECT SHIFT SOLENOID VALVE(S4)
(a) Remove the shift solenoid valve S4.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
Solenoid Connector (S4) - Solenoid
Body (S4)11 to 15 W
(c) Connect positive (+) lead to the terminal of solenoid con-
nector, negative (-) lead to the solenoid body.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(S4)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40-34)

05-1 100- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E/U151F)
1290 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0985 SHIFT SOLENOID ºEº CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE SR)
DTC P0986 SHIFT SOLENOID ºEº CONTROL CIRCUIT
HIGH (SHIFT SOLENOID VALVE SR)
CIRCUIT DESCRIPTION
Shifting from 1st to 5th is performed in combination with ºONº and ºOFFº operation of the shift solenoid valves
SL1, SL2, SL3, S4 and SR which is controlled by the ECM. If an open or short circuit occurs in either of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be
operated smoothly (Fail safe function).
DTC No.DTC Detection ConditionTrouble Area
P0985ECM detects short in solenoid valve SR circuit 2 times when
solenoid valve SR is operated (1-trip detection logic)
Short in shift solenoid valve SR circuit

Shift solenoid valve SR

ECM
P0986ECM detects open in solenoid valve SR circuit 2 times when
solenoid valve SR is not operated (1-trip detection logic)
Open in shift solenoid valve SR circuit

Shift solenoid valve SR

ECM
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. When there is an open or
short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and
stores the DTC. And the ECM performs the fail-safe function and turns the other shift solenoid valves in good
condition ºON/OFFº (In case of an open or short circuit, the ECM stops sending current to the circuit.)
(see page 05-1030).
MONITOR STRATEGY
Related DTCsP0985: Shift solenoid valve SR/Range check (Low resistance)
P0986: Shift solenoid valve SR/Range check (High resistance)
Required sensors/ComponentsShift solenoid valve SR
Frequency of operationContinuous
Duration0.064 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
P0985: Range check (Low resistance)
The monitor will run whenever this DTC is not present.See page 05-1007
Shift solenoid valve SRON
Battery voltage8 V or more
Ignition switchON
StarterOFF
P0986: Range check (High resistance)
The monitor will run whenever this DTC is not present.See page 05-1007
Shift solenoid valve SROFF
Battery voltage8 V or more
Ignition switchON
StarterOFF
05C18-12

G31165
E1
Electronically Controlled
Transmission SolenoidECM
9
E8SR
9 VL-B
SR+B
CPU
G26426
Transmission Wire Side:
(Connector Front View):
SR
E1
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E/U151F)05-1 101
1291 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TYPICAL MALFUNCTION THRESHOLDS
P0985: Range check (Low resistance)
Shift solenoid valve SR resistance8 W or less
P0986: Range check (High resistance)
Shift solenoid valve SR resistance100 kW or more
COMPONENT OPERATING RANGE
Shift solenoid valve SRResistance: 11 to 15 W at 20C (68F)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SR)
(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
20C (68F)
9 - Body ground11 to 15 W
NG Go to step 3
OK

C82158C91565
SR
E7E8E9E6E5
ECM:
C90640
(+) (-)
Shift Solenoid Valve SR:
05-1 102- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E/U151F)
1292 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE - ECM)
(a) Connect the transmission connector to the transaxle.
(b) Disconnect the connector from the ECM.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20C (68F)
E8 - 9 (SR) - Body ground11 to 15 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 01-36)
OK
REPLACE ECM (SEE PAGE 10-24)
3 INSPECT SHIFT SOLENOID VALVE(SR)
(a) Remove the shift solenoid valve SR.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20C (68F)
Solenoid Connector (SR) - Solenoid
Body (SR)11 to 15 W
(c) Connect positive (+) lead to the terminal of solenoid con-
nector, negative (-) lead to the solenoid body.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SR)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40-37)

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-243
433 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT LOW
DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT HIGH
CIRCUIT DESCRIPTION
The throttle actuator is operated by the ECM and it opens and closes the throttle valve.
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the
throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to
control the throttle actuator and monitor the throttle opening angle in response to driver inputs.
HINT:
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2102
Conditions (a) and (b) continue for 2.0 seconds:
(a) Throttle actuator output duty 80 % or more
(b) Throttle actuator current 0.5 A or less
(1 trip detection logic)
Open in throttle actuator circuit

Throttle actuator

ECM
P2103
Either of following conditions is met:

Throttle actuator current 10 A or more (0.1 seconds)

Throttle actuator current 7 A or more (0.6 seconds)
(1 trip detection logic)
Short in throttle actuator circuit

Throttle actuator

Throttle valve

Throttle body assy

ECM
MONITOR DESCRIPTION
The ECM monitors the flow of electrical current through the electronic throttle actuator, and detects malfunc-
tions or open circuits in the throttle motor based on the value of the electrical current. When the current devi-
ates from the standard, the ECM concludes that there is a fault in the throttle motor. Or, if the throttle valve
is not functioning properly (for example, stuck on), the ECM concludes that there is a fault and turns on the
MIL and a DTC is set.
Example:
When the current is more than 10 A, or the current is less than 0.5 A when the actuator driving duty ratio
is more than 80 %, the ECM concludes that the current is deviated from the standard, turns on the MIL and
a DTC is set.
FAIL-SAFE
If the ETCS has a malfunction, the ECM cuts off current to the throttle actuator. The throttle control valve
returns to a predetermined opening angle (approximately 16) by the force of the return spring. The ECM
then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in
accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop
and the system will return to normal condition.
05EVQ-05

A87825
T13
Throttle
Actuator
2
1B
WECM
M+
M- Shielded
GE01 M+
M-
E92
E9 E93
17 05-244
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
434 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR STRATEGY
Related DTCsP2102: Throttle actuator current (low current)
P2103: Throttle actuator current (high current)
Required sensors / components (Main)Throttle actuator
Required sensors / components (Related)-
Frequency of operationContinuous
Duration2 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
P2102:
Throttle actuator duty ratio80 % or more
Throttle actuator power supply8 V or more
P2103:
Throttle actuator power supply8 V or more
Battery voltage8 V or more
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
P2102:
Throttle actuator currentLess than 0.5 A
P2103:
Either of the following conditions is met:Condition 1 or 2
1. Hybrid IC diagnosis signalFail ( for 0.1 sec.)
2. Hybrid IC current limiter portFail (for 0.6 sec.)
WIRING DIAGRAM

A59778M- M+
T13
Throttle Actuator
Y
B53781
A81698A85540
Wire Harness Side
M+
M-
E9
ECM
M+ M-
T13
Throttle Actuator
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-245
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:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, and other data from the time the malfunction occurred.
1 INSPECT THROTTLE BODY ASSY (THROTTLE ACTUATOR)
(a) Disconnect the T13 throttle actuator connector.
(b) Measure the resistance of the throttle actuator terminals.
Standard:
Tester ConnectionSpecified Condition
T13-2 (M+) - T13-1 (M-)0.3 to 100 W (20 C (68F))
NG REPLACE THROTTLE BODY ASSY
OK
2 CHECK WIRE HARNESS (THROTTLE ACTUATOR - ECM)
(a) Disconnect the T13 throttle actuator connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
T13-2 (M+) - E9-3 (M+)
T13-1 (M-) - E9-2 (M-)Below 1 W
T13-2 (M+) or E9-3 (M+) - Body ground
T13-1 (M-) or E9-2 (M-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK

05-246
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT THROTTLE BODY ASSY
(a) Visually check for foreign objects between the throttle valve and the housing.
Also, check if the valve can open and close smoothly.
OK: The throttle valve is not contaminated with foreign objects and can move smoothly.
NG REMOVE FOREIGN OBJECT AND CLEAN
THROTTLE BODY
OK
REPLACE ECM (See page 10-9)