TOYOTA HIGHLANDER 2001 Service Repair Manual
Page 1431 of 2572
G36788
ON
0.02 inch Oriffice High-flow
3/5
ONON
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Negative
Steps
(Reference)TimeON: Open
OFF: Closed
OFF: Vent ON: Closed
Leak Pressure First 0.02 inch
Standard
2/5
Vacuum Pump Stuck OFF
Within 15 minutes
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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523 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
11 PERFORM EVAP SYSTEM CHECK(STEP 3/5)
(a) Check the EVAP pressure in step 3/5.
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
P043F and
P2401EVAP pressure less than [0.02 inch leak pressure
standard x 0.2]0.02 inch orifice high-flowA
P043F and
P2401EVAP pressure more than [0.02 inch leak pressure
standard x 0.2]Vacuum pump stuck OFFB
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
HINT:
The 0.02 inch leak pressure standard is the value determined in step 2/5.
A Go to step 30
B Go to step 23
Page 1432 of 2572
A85254
Purge VSV
Hose (to canister)
05-334
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524 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
12 PERFORM ACTIVE TEST(PURGE VSV)
(a) On the hand-held tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II/ ACTIVE TEST /
EVAP VSV.
(b) Disconnect the hose (connected to the canister) from the
purge VSV.
(c) Start the engine.
(d) On the tester, turn off the purge VSV (EVAP VSV: OFF).
(e) Use your finger to confirm that the purge VSV has no suc-
tion.
(f) Using the tester, turn on the purge VSV (EVAP VSV: ON).
(g) Use your finger to confirm that the purge VSV has suction.
Result:
Test ResultsSuspected Trouble AreasProceed To
No suction when purge VSV turned OFF, and suction applied
when tuned ONPurge VSV normalA
Suction applied when purge VSV turned OFFPurge VSV stuck openB
No suction when purge VSV turned ON
Purge VSV stuck closed
Problems with EVAP hose between purge VSV and throttle
body
C
(h) Reconnect the hose.
B Go to step 14
C Go to step 15
A
Page 1433 of 2572
A85254
Purge VSV
Hose (to canister)
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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525 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
13 CHECK FUEL TANK CAP ASSY
(a) Check that the fuel tank cap is correctly installed.
(b) Confirm that the fuel tank cap is tightened until a few click sounds are heard.
HINT:
If an EVAP tester is available, check the fuel tank cap using the tester.
(1) Remove the fuel tank cap and install it onto a fuel tank cap adaptor.
(2) Connect an EVAP tester pump hose to the adaptor, and pressurize to 3.2 to 3.7 kPa (24 to 28
mmHg) using an EVAP tester pump.
(3) Seal the adaptor and wait for 2 minutes.
(4) Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel tank cap is normal.
(5) Reinstall the fuel tank cap.
Result:
Test ResultsSuspected trouble AreasProceed To
Fuel tank cap correctly installed'A
Fuel tank cap loose
Fuel tank cap improperly installed
Defective fuel tank cap
Fuel tank cap does not meet OEM specifications
B
No fuel tank cap'C
A Go to step 29
B Go to step 27
C Go to step 28
14 INSPECT VACUUM SWITCHING VALVE ASSY NO.1
(a) Turn the ignition switch to OFF.
(b) Disconnect the purge VSV connector.
(c) Disconnect the hose (connected to the canister) from the
purge VSV.
(d) Start the engine.
(e) Use your finger to confirm that the purge VSV has no suc-
tion.
Result:
Test ResultsSuspected Trouble AreasProceed To
No suctionECMA
Suction appliedPurge VSVB
(f) Reconnect the purge VSV connector.
(g) Reconnect the hose.
A Go to step 35
B Go to step 31
Page 1434 of 2572
A85261
Purge VSV
Hose (to throtlle body)
A68357
A
B Purge VSV
05-336
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526 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
15 CHECK EVAP HOSE(PURGE VSV - THROTTLE BODY)
(a) Disconnect the hose (connected to the throttle body) from
the purge VSV.
(b) Start the engine.
(c) Use your finger to confirm that the hose has suction.
Result:
Test ResultsSuspected Trouble AreasProceed To
Suction appliedEVAP hose between purge VSV and throttle body
normalA
No suction
Throttle body
EVAP hose between purge VSV and throttle
body
B
(d) Reconnect the hose.
B Go to step 26
A
16 NSPECT VACUUM SWITCHING VALVE ASSY NO.1(PURGE VSV)
(a) Remove the purge VSV.
(b) Apply battery voltage to the terminals of the purge VSV.
(c) Using an air gun, confirm that air flows from port A to port
B.
Result:
Test ResultsSuspected Trouble AreasProceed To
Air flowedPurge VSV normalA
No air flowPurge VSVB
(d) Install the purge VSV.
B Go to step 31
A
Page 1435 of 2572
A56870
Wire Harness Side
V4
Purge VSV
A81699
ECM
E7
34 (PRG)
A56870
Wire Harness Side
V4
Purge VSV
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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527 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
17 CHECK WIRE HARNESS AND CONNECTOR(POWER SOURCE OF PURGE VSV)
(a) Disconnect the V4 Purge VSV connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between terminal 1 of the V4 con-
nector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
Between 11 V and 14 VNormalA
Other than result aboveWire harness or connectors between purge VSV
and ECMB
(d) Reconnect the purge VSV connector.
B Go to step 32
A
18 CHECK WIRE HARNESS AND CONNECTOR(PURGE VSV - ECM)
(a) Disconnect the E7 connector and the V4 purge VSV con-
nector.
(b) Check the resistance.
Standard:
Tester ConnectionsSpecified Conditions
E7-34 (PRG) - V1-1Below 1 W
E7-34 (PRG) - Body ground10 kW or higher
V4-2 - Body ground10 kW or higher
(c) Reconnect the purge VSV connector.
(d) Reconnect the ECM connector.
OK Go to step 35
NG Go to step 32
Page 1436 of 2572
A85259
ECM
E5
27 (VPMP)
A85259
ECM
E5
27 (VPMP)
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528 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
19 PERFORM ACTIVE TEST USING HAND-HELD TESTER(FOR VENT VALVE)
(a) Turn the ignition switch to ON.
(b) On the hand-held tester, select the following menu items:
DIAGNOSIS/ ENHANCED OBD II/ ACTIVE TEST/ VENT
VALVE (ALONE).
(c) Measure the voltage between terminal VPMP of the ECM
connector and the body ground when the vent valve is
turned ON (close) and OFF (vent) using the tester.
Result:
Test ResultsSuspected Trouble AreasProceed To
Between 9 V and 14 V when OFF
Below 3 V when ONVent valveA
Below 3 V when OFF and ONECMB
A Go to step 22
B Go to step 35
20 PERFORM ACTIVE TEST USING HAND-HELD TESTER(FOR VENT VALVE)
(a) Turn the ignition switch to ON.
(b) On the hand-held tester, select the following menu items:
DIAGNOSIS/ ENHANCED OBD II/ ACTIVE TEST/ VENT
VALVE (ALONE).
(c) Measure the voltage between terminal VPMP of the ECM
connector and the body ground when the vent valve is
turned ON (close) and OFF (vent) using the tester.
Result:
Test ResultsSuspected Trouble AreasProceed To
Below 3 V when OFF and ONPower source of vent valveA
Between 9 V and 14 V when OFF
Below 3 V when ONVent valveB
Between 9 V and 14 V when OFF and ONECMC
B Go to step 22
C Go to step 35
A
Page 1437 of 2572
A85252
C17
A85258
Wire Harness Side
C17
Canister
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-339
529 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
21 INSPECT PUMP MODULE(POWER SOURCE FOR VENT VALVE)
(a) Turn the ignition switch OFF.
(b) Disconnect the C17 canister connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage between terminal 9 of the canister
connector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
Between 9 V and 14 VNormalA
Between 0 V and 3 VPower source wire harness of vent valveB
(e) Reconnect the canister connector.
B Go to step 32
A
Page 1438 of 2572
A85253
8 (-) 9 (+)
A85259
ECM
E5
4 (MPMP)
05-340
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530 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
22 INSPECT PUMP MODULE(VENT VALVE OPERATION)
(a) Turn the ignition switch to OFF.
(b) Disconnect the canister connector.
(c) Apply the battery voltage to terminals 9 and 8 of the pump
module.
(d) Touch the pump module to confirm the vent valve opera-
tion.
Result:
Test ResultsSuspected Trouble AreasProceed To
OperatingWire harness between vent valve and ECMA
Not operatingVent valveB
(e) Reconnect the canister connector.
A Go to step 32
B Go to step 30
23 PERFORM ACTIVE TEST USING HAND-HELD TESTER(FOR PUMP
MODULE(VACUUM PUMP)
(a) On the hand-held tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VAC-
UUM PUMP (ALONE).
(b) Measure the voltage between terminal MPMP of the ECM
connector and the body ground when the vacuum pump
is turned ON and OFF using the tester.
Result:
Tests ResultsSuspected Trouble AreasProceed To
Between 0 V and 3 V when OFF
Between 9 V and 14 V when ONECM normalA
Between 9 V and 14 V when OFF
Between 0 V and 3 V when ONECMB
B Go to step 35
A
Page 1439 of 2572
A85252
C17
A85258
Wire Harness Side
C17
Canister
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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531 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
24 CHECK WIRE HARNESS AND CONNECTOR(PUMP MODULE - ECM)
(a) Turn the ignition switch OFF.
(b) Disconnect the C17 canister connector.
(c) Turn the ignition switch to ON.
(d) On the hand- held tester, select the following menu
items:DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST
/ VACUUM PUMP (ALONE).
(e) Turn the vacuum pump ON.
(f) Measure the voltage between terminal 1 of the canister
connector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
Between 9 V and 14 VNormalA
Between 0 V and 3 VWire harness between ECM and vacuum pumpB
(g) Reconnect the canister connector.
B Go to step 32
A
Page 1440 of 2572
A85258
Wire Harness Side
C17
Canister
05-342
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
532 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
25 CHECK WIRE HARNESS AND CONNECTOR(PUMP MODULE - GROUND)
(a) Disconnect the C17 canister connector.
(b) Turn the ignition switch to OFF.
(c) Check the resistance between terminal 6 of the canister
connector and the body ground.
Result:
Test ResultsSuspected Trouble AreasProceed To
Below 1 WVacuum pumpA
10 kW or moreWire harness between vacuum pump and body
groundB
(d) Reconnect the canister connector.
A Go to step 30
B Go to step 32
26 INSPECT THROTTLE BODY ASSY
(a) Stop the engine.
(b) Disconnect the EVAP hose from the throttle body.
(c) Start the engine.
(d) Use your finger to confirm that the port of the throttle body has suction.
Result:
Test ResultsSuspected Trouble AreasProceed To
Suction appliedEVAP hose between throttle body and purge VSVA
No suctionThrottle bodyB
(e) Reconnect the EVAP hose.
A Go to step 33
B Go to step 34
27 CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP
HINT:
When reinstalling the fuel tank cap, tighten it until a few click sounds are heard.
When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and tighten it
until a few click sounds are heard.
NEXT Go to step 37