TOYOTA HIGHLANDER 2001 Service Repair Manual

G36780
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Leak Pressure
sec NegativeON OFF
Sequence
TimeA
10
sec60
Within 15 minutes ON
First 0.02 inch
BCD
EVAP Pressure when Vent Valve Stuck OFF (vent):
OK
Malfunction
ON: Open
OFF: Closed
OFF: Vent ON: Closed
10
Standard
sec60
E
OFF
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(b) P2420: Vent valve stuck OFF (Vent)
After sequence B, the ECM changes the vent valve from OFF (Vent) to ON (Closed) and measures
the EVAP pressure. If the pressure does not change, the ECM illuminates the MIL and sets DTC P2420
(2-trip detection logic).

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OBD II MONITOR SPECIFICATIONS
Monitor Strategy
Required Sensors/ComponentsPurge VSV and pump module
Frequency of OperationOnce per driving cycle
DurationWithin 15 minutes (varies with amount of fuel in tank)
MIL Operation2 driving cycles
Sequence of OperationNone
Typical Enabling Conditions
The monitor will run whenever these DTCs are not presentSee page 05-16
EVAP key-off monitor runs when all of the following condi-
tions met:-
Atmospheric pressure525 to 825 mmHg (70 to 110 kPa)
Battery voltage10.5 V or more
Vehicle speedBelow 4 km/h (2.5 mph)
Ignition switchOFF
Engine conditionNot running
Time after engine stopped5 hours
FTP sensor malfunction (P0450, P0452, P0453)Not detected
Purge VSVNot operated by scan tool
Vent valveNot operated by scan tool
Leak detection pumpNot operated by scan tool
Both of the following conditions are met before IG switch
OFF:Condition 1 and 2
1. Duration that vehicle is driven5 min. or more
2. Purge flowExecuted
ECT4.4 to 35C (40 to 95F)
IAT4.4 to 35C (40 to 95F)
Accumulated purge volume100 g or more (varies with engine coolant temperature)
Example of re-start time
First time7 hours
Second time9 hours and 30 min.
Key-of f monitor sequence: 1 to 8
1. Atmospheric pressure
Next sequence is run if following condition met-
Atmospheric pressure change for 10 sec.Within 2.25 mmHg (0.3 kPa) for 1 sec.
2. First reference pressure
Next sequence is run if all of following conditions metCondition 1, 2 and 3
1. FTP when 4 sec. after reference pressure measurement-7.5 mmHg (-1 kPa) or less
2. Reference pressure-36.47 to -7.93 mmHg (-4.85 to -1.057 kPa)
3. Reference pressureSaturated
3. Vent valve stuck closed check
Next sequence is run if following condition met-
FTP change for 10 sec. after vent valve ON (closed)2.25 mmHg (0.3 kPa) or more
4. Vacuum introduction and leak
Next sequence is run if both of following conditions metCondition 1 and 2
1. Vacuum introduction timeWithin 15 min.
2. FTPFTP was saturated
5. Purge VSV stuck closed check
Next sequence is run if following condition met-
FTP change for 10 sec. after purge VSV ON (open)2.25 mmHg (0.3 kPa) or more

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6. Second reference pressure measurement
Next sequence is run if all of following conditions metCondition 1, 2, 3 and 4
1. FTP when 4 sec. after reference pressure measurement-7.5 mmHg (-1 kPa) or less
2. Reference pressure-36.47 to -7.93 mmHg (-4.85 to -1.057 kPa)
3. Reference pressureSaturated
4. Reference pressure difference between first and secondLess than 5.25 mmHg (0.7 kPa)
7. Leak check
Next sequence is run if following condition met-
FTP when vacuum introduction was completeLower than second reference pressure
8. Atmospheric pressure
Monitor is complete if following-
Atmospheric pressure difference between sequence 1 and 8Within 2.25 mmHg (0.3 kPa)
Typical Malfunction Thresholds
P2419: Vent valve stuck open
Following values are when atmospheric pressure is 760
mmHg (100 kPa)-
One of the following conditions is met:Condition 1, 2, 3, 4 or 5
1. FTP when 4 seconds after reference pressure measure-
ment beganMore than -7.5 mmHg (-1 kPa)
2. Reference pressureLess than -36.4 mmHg (-4.85 kPa)
3. Reference pressure-7.9 mmHg (-1.057 kPa) or more
4. Reference pressureNot saturated
5. Reference pressure difference between first and second5.2 mmHg (0.7 kPa) or more
P2420: Vent valve stuck closed
FTP change for 10 sec. after vent valve openedLess than 0.3 kPa (2.25 mmHg)
MONITOR RESULT (MODE 06)
Refer to page 05-317 for detailed information on Monitor Result.

A85251
Soak Timer Circuit
Ignition Switch
IGSW
Power
ECM
EFI MAIN
MREL+B
15 ASource IC
Soak Timer ICMain Relay
Control IC
Battery 05-300
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P2610 ECM/PCM INTERNAL ENGINE OFF TIMER
PERFORMANCE
DTC SUMMARY
DTCMonitoring ItemsMalfunction Detection ConditionsTrouble AreasDetection
TimingsDetection
Logic
P2610Soak timer (built into ECM)ECM internal malfunctionECMEngine
running2 trip
CIRCUIT DESCRIPTION
To ensure the accuracy of the EVAP (Evaporative Emission) monitor values, the soak timer, which is built
into the ECM, measures 5 hours (
15 minutes) from when the ignition switch is turned OFF, before the moni-
tor is run. This allows the fuel to cool down, which stabilizes the Fuel Tank Pressure (FTP). When 5 hours
have elapsed, the ECM turns on.
MONITOR DESCRIPTION
5 hours after the ignition switch is turned OFF, the soak timer activates the ECM to begin the EVAP system
monitor. While the engine is running, the ECM monitors the synchronization of the soak timer and the CPU
clock. If these two are not synchronized, the ECM interprets this as a malfunction, illuminates the MIL and
sets the DTC (2 trip detection logic).
05IRF-02

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OBD II MONITOR SPECIFICATIONS
Monitor Strategy
Required Sensors/ComponentsECM
Frequency of OperationOnce per driving cycle
Duration10 minutes
MIL Operation2 driving cycles
Sequence of OperationNone
Typical Enabling Conditions
The monitor will run whenever this DTC is not presentSee page 05-16
Ignition switchON
EngineRunning
Battery voltage8 V or more
StarterOFF
Typical Malfunction Thresholds
Soak timer measurement when ECM CPU clock counts 10
minutesLess than 7 minutes, or more than 13 minutes
INSPECTION PROCEDURE
HINT:

DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM
replacement is required.

Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the
engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help
determine if the vehicle was moving or stationary, 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 REPLACE ECM (see page 10-9)
NEXT
CHECK WHETHER DTC OUTPUT RECURS
(a) Connect a hand-held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Clear DTCs (see page 05-38).
(d) Start the engine and wait for 10 minutes or more.
(e) On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PEND-
ING CODES.
(f) If no pending DTC is displayed, the repair has been successfully completed.

D02290
Line Pressure
Control Pressure
Current Flow to Solenoid
BE4056
ON
OFF
1 cycle 05-974
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TRANSAXLE [ECT] (U241E/U140F)
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DTC P2716 PRESSURE CONTROL SOLENOID ºDº
ELECTRICAL (SHIFT SOLENOID SLT)
CIRCUIT DESCRIPTION
The linear solenoid valve (SLT) controls the transmission line
pressure for smooth transmission operation based on signals
from the throttle position sensor and the vehicle speed sensor.
The ECM adjusts the duty cycle of the SLT solenoid valve to
control hydraulic line pressure coming from the primary regula-
tor valve. Appropriate line pressure assures smooth shifting
with varying engine outputs.
(*): Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non-continuity, then
Duty Ratio=A/(A+B) x 100 (%)
DTC No.DTC Detection ConditionTrouble Area
P2716
Condition (a) or (b) below is detected 1 sec. or more:
(1-trip detection logic)
(a) SLT-
terminal: 0V
(b) SLT-
terminal: 12V

Open or short in shift solenoid valve SLT circuit

Shift solenoid valve SLT

ECM
MONITOR DESCRIPTION
When an open or short in the linear solenoid valve (SLT) circuit is detected, the ECM interprets this as a fault.
The ECM will turn ON the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP2716: Shift solenoid valve SLT/Range check
Required sensors/ComponentsShift solenoid valve SLT
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever this DTC is not present.See page 05-895
Battery voltage11 V or more
Solenoid current cut statusNot cut
CPU commanded duty ratio to SLT19% or more
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Solenoid status from ICFail (Open or short)
05C19-26

G31770
ECM
SLT+
SLT- E8 13
12 Y-R
B-Y E10 Electronically Controlled
Transmission Solenoid
E8 O
G2
7 SLT+
SLT-+B
D25234
Transmission Wire Side:
(Connector Front View):
E10
SLT-SLT+
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COMPONENT OPERATING RANGE
Shift solenoid valve SLTResistance: 5.0 to 5.6 W at 20C (68F)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SLT)
(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)
2 (SLT+) - 7 (SLT-)5.0 to 5.6 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard (Check for short):
Tester ConnectionSpecified Condition
2 (SLT+) - Body ground10 kW or higher
7 (SLT-) - Body ground=
NG Go to step 3
OK

C82158C91565
SLT+ SLT-
E7E8E9E6E5
ECM:
05-976- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
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2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE - ECM)
(a) Connect the transmission wire connector to the transaxle.
(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 - 13 (SLT+) - E8 - 12 (SLT-)5.0 to 5.6 W
(d) Measure the resistance according to the value(s) in the
table below.
Standard (Check for short):
Tester ConnectionSpecified Condition
E8 - 13 (SLT+) - Body ground10 kW or higher
E8 - 12 (SLT-) - Body ground=
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (SEE PAGE 01-36)
OK
REPLACE ECM (SEE PAGE 10-9)

D25466
12
12
(+)
(-)
Shift Solenoid Valve SLT:
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3 INSPECT SHIFT SOLENOID VALVE(SLT)
(a) Remove the shift solenoid valve (SLT).
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
20 C (68 F)
1 - 25.0 to 5.6 W
(c) Connect the positive (+) lead with a 21 W bulb to terminal
2 and the negative (-) lead to terminal 1 of the solenoid
valve connector, then check the movement of the valve.
OK:
The solenoid makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SLT)
OK
REPAIR OR REPLACE TRANSMISSION WIRE (SEE PAGE 40-34)

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DTC P2769 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT LOW (SHIFT SOLENOID VALVE
DSL)
DTC P2770 TORQUE CONVERTER CLUTCH SOLENOID
CIRCUIT HIGH (SHIFT SOLENOID VALVE
DSL)
CIRCUIT DESCRIPTION
The shift solenoid valve DSL is turned ºONº and ºOFFº by signals from the ECM in order to control the hydrau-
lic pressure operation, the lock-up relay valve, which then the controls operation of the lock-up clutch.
DTC No.DTC Detection ConditionTrouble Area
P2769ECM detects short in solenoid valve DSL circuit (0.1 sec.)
when solenoid valve DSL is operated (2-trip detection logic)
Short in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
P2770
ECM detects open in solenoid valve DSL circuit (0.1 sec.)
when solenoid valve DSL is not operated (2-trip detection
logic)
Open in shift solenoid valve DSL circuit

Shift solenoid valve DSL

ECM
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on engine rpm, engine load, engine temperature,
vehicle speed, transmission temperature, and shift range selection. The ECM determines the lock-up status
of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT). The ECM calculates
the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions
are appropriate, the ECM requests ºlock-upº by applying control voltage to shift solenoid DSL. When the
DSL is opened, solenoid DSL applies pressure to the lock-up relay valve and locks the torque converter
clutch. If the ECM detects an open or short in the DSL solenoid circuit, the ECM interprets this as a fault in
the DSL solenoid or circuit. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP2769: Shift solenoid valve DSL/Range check (Low resistance)
P2770: Shift solenoid valve DSL/Range check (High resistance)
Required sensors/ComponentsShift solenoid valve DSL
Frequency of operationContinuous
Duration0.064 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
P2769: Range check (Low resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Solenoid current cut statusNot cut
Shift solenoid valve DSLON
Battery voltage8 V or more
Ignition switchON
StarterOFF
0527R-37