Inspection Procedure

NOTE: The intelligent tester is required to conduct the following diagnostic troubleshooting procedure.

HINT:

Using the intelligent tester monitor results enables the EVAP system to be confirmed.
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

CONFIRM DTC
1. Turn the power switch OFF and wait for 10 seconds.
2. Turn the power switch ON (IG).
3. Turn the power switch OFF and wait for 10 seconds.
4. Connect the intelligent tester to the DLC3.
5. Turn the power switch ON (IG).
6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
7. Check if DTC P0446 is output.
NO: Go to step 5

YES: Go to next step
PERFORM EVAP SYSTEM CHECK
1. Note the freeze frame data and DTCs.
2. Clear the DTCs.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
4. After the system check is finished, check for pending DTCs.
  OK:
  
  No DTC is present.
NG: Go to step 6

OK: Go to next step
CHECK OPERATION FOR PRESSURE SWITCHING VALVE
1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / TANK BYPASS VSV.
2. Touch the pressure switching valve (TANK BYPASS VSV) to feel the operating vibration.
  OK:
  
  The pressure switching valve is operated by the ACTIVE TEST.
NG: Go to step 18

OK: Go to next step
CHECK PRESSURE SWITCHING VALVE
1. Turn the power switch OFF.
2. Remove the pressure switching valve (See REMOVAL ) .
3. Reconnect the pressure switching valve connector.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / TANK BYPASS VSV.
5. Check the airflow for the pressure switching valve.
  OK:
  
  The pressure switching valve operates normally.
NG: Go to step 19

OK: Go to step 33

Fig 1: Checking Pressure Switching Valve
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
PERFORM EVAP SYSTEM CHECK
1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
2. After the system check is finished, check for pending DTCs.
  OK:
  
  DTCs are present.
NG: CHECK FOR INTERMITTENT PROBLEMS

OK: Go to next step
CHECK DTC
1. Check the DTCs that were present in the EVAP system check.
  OK:
  
  P043E, P043F, P2401, P2402 and P2419 are present.
NG: Go to step 10

OK: Go to next step
CHECK VENT VALVE CLOSE STUCK
1. Allow the engine to idle.
2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.
3. Turn the EVAP VSV ON (purge VSV open) and check the VAPOR PRESS (EVAP pressure) for 10 seconds.
  OK:
  
  EVAP pressure is higher than 755 mmHg.
NG: Go to step 20

OK: Go to next step
CHECK LEAK DETECTION PUMP OPERATION
1. Turn the power switch OFF.
2. Turn the power switch ON (IG).
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP.
4. Touch the pump module to feel the operating vibration.
  OK:
  
  The leak detection pump is operated by the ACTIVE TEST.
NG: Go to step 21

OK: Go to next step
CHECK TRAP CANISTER
1. Disconnect the vent hose from the pump module.
2. Check that no moisture is in the pump module or the vent hose.
  OK:
  
  No moisture.
OK: Go to step 22

NG: Go to step 23

Fig 2: Locating Vent Hose
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK DTC
1. Check the DTCs that were present in the EVAP system check.
  OK:
  
  P0441, P0455 and/or P0456 are present.
NG: Go to step 16

OK: Go to next step
CHECK INSTALLATION CONDITION OF FUEL CAP
1. Remove the fuel cap.
2. Reinstall the fuel cap.
3. Clear the DTCs.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
5. After the system check is finished, check for pending DTCs.
  HINT:
  
  If no DTC is present, this indicates that the fuel cap is loosened.
  
  OK:
  
  No DTC is present.
OK: REPAIR COMPLETED

NG: Go to next step
LOCATE LEAK POINT
1. Disconnect the vent hose (fresh air line) as shown in the illustration.
  
  Fig 3: Disconnecting Vent Hose
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the pressure gauge and air pump as shown in the illustration.
3. Pressurize the EVAP system until the pressure reaches 24 to 28 mmHg.
4. Locate the leak point.
  HINT:
  
  If the EVAP system has leakage, a whistling sound may be heard.
  
  OK:
  
  The leak point is found.
OK: Go to step 24

NG: Go to next step
CHECK FUEL CAP
Check that the fuel cap meets OEM specifications.

HINT:

If an EVAP tester is available, perform the fuel cap test according to the tester's instructions.

OK:

Fuel cap meets OEM specifications.

NG: Go to step 25

OK: Go to next step
CHECK OPERATION FOR PURGE VSV
1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.
2. Touch the purge VSV to feel the operating vibration.
  OK:
  
  The purge VSV (EVAP VSV) is operated by the ACTIVE TEST.
NG: Go to step 26

OK: Go to next step
CHECK INTAKE MANIFOLD PRESSURE
1. Disconnect the purge VSV hose that is connected to the throttle body.
2. Allow the engine to idle.
3. Check that the hose has suction using your finger.
  OK:
  
  The hose has suction.
NG: Go to step 27

OK: Go to step 28

Fig 4: Checking Intake Manifold Pressure
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK DTC
1. Check the DTCs that were present in the EVAP system check.
  OK:
  
  P0451 is not present.
NG: Go to step 9

OK: Go to next step
CHECK OPERATION OF VENT VALVE
1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE.
2. Touch the pump module to feel the operating vibration.
  OK:
  
  The vent valve is operated by the ACTIVE TEST.
OK: Go to step 9

NG: Go to step 29

CHECK HARNESS AND CONNECTOR (PRESSURE SWITCHING VALVE - ECM AND EFI M RELAY)

Check the harness and the connectors between the pressure switching valve and the ECM.

Disconnect the V8 pressure switching valve connector.

Fig 5: Identifying V8 Pressure Switching Valve Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E7 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V8-1 (Pressure switching valve) - E7-18 (TBP)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V8-1 (Pressure switching valve) or E7-18 (TBP) - Body ground	10 kΩ or higher

Fig 6: Disconnecting E7 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reconnect the pressure switching valve connector.
Reconnect the ECM connector.

Check the harness and the connectors between the pressure switching valve and the EFI M relay.

Disconnect the V8 pressure switching valve connector.
Remove the integration relay from the engine room relay block.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V8-2 (Pressure switching valve) - 3I-8 (EFI M relay)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V8-2 (Pressure switching valve) or 3I-8 (EFI M relay) - Body ground	10 kΩ or higher

Reconnect the pressure switching valve connector.
Reinstall the integration relay.

NG: Go to step 30

OK: Go to step 31

Fig 7: Identifying Location Of Integration Relay From Engine Room Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

REPLACE PRESSURE SWITCHING VALVE
Replace the pressure switching valve (See REMOVAL ) .

NEXT: Go to step 34
CHECK FOR VENT HOSE CLOG
1. Turn the power switch OFF.
2. Disconnect the vent hose (fresh air line) as shown in the illustration.
3. Allow the engine to idle.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.
5. Turn the purge VSV (EVAP VSV) ON and check the EVAP pressure (VAPOR PRESS) for 10 seconds.
  OK:
  
  EVAP pressure is higher than 755 mmHg.
NG: Go to step 22

OK: Go to step 32

Fig 8: Locating Vent Hose
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK HARNESS AND CONNECTOR (LEAK DETECTION PUMP - ECM)

Disconnect the V7 canister connector.

Fig 9: Identifying V7 Canister Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E7 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-1 (MTRB) - E7-13 (MPMP)	Below 1 Ω
V7-6 (MGND) - Body ground	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-1 (MTRB) or E7-13 (MPMP) - Body ground	10 kΩ or higher

Reconnect the canister connector.
Reconnect the ECM connector.

Fig 10: Disconnecting E7 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 30

OK: Go to step 31

REPLACE TRAP CANISTER WITH PUMP MODULE
Replace the trap canister with pump module (See REMOVAL ) .

NEXT: Go to step 34
CHECK FOR VENT HOSE DAMAGE
Check for hose damage as shown in the illustration. If necessary, replace the vent hose.

Fig 11: Identifying Vent Hose Inspection Area
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NEXT: Go to step 22
REPAIR OR REPLACE LEAK POINT
NEXT: Go to step 34
REPLACE FUEL CAP
NEXT: Go to step 34

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

Disconnect the V1 purge VSV connector.

Fig 12: Identifying V1 Purge VSV Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E5 ECM connector.

Check the harness and the connectors between the ECM and the purge VSV connectors.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V1-1 - E5-14 (EVP1)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V1-1 or E5-14 (EVP1) - Body ground	10 kΩ or higher

Fig 13: Disconnecting E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Remove the integration relay from the engine room relay block.

Check the harness and connectors between the purge VSV connector and the EFI M relay.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V1-2 - 3I-8 (EFI M relay)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V1-2 or 3I-8 (EFI M relay) - Body ground	10 kΩ or higher

Reconnect the purge VSV connector.
Reconnect the ECM connector.

Fig 14: Identifying Location Of Integration Relay From Engine Room Relay Block
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Reinstall the integration relay.

NG: Go to step 30

OK: Go to step 31

REPLACE HOSE (PURGE VSV - THROTTLE BODY)
NEXT: Go to step 34
REPLACE PURGE VSV
Replace the purge VSV (See REMOVAL ) .

NEXT: Go to step 34

CHECK HARNESS AND CONNECTOR (VENT VALVE - ECM)

Disconnect the V7 canister connector.

Fig 15: Identifying V7 Canister Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E7 ECM connector.

Check the harness and the connectors between the ECM and the canister connectors.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-8 (VGND) - E7-26 (VPMP)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-8 (VGND) or E7-26 (VPMP) - Body ground	10 kΩ or higher

Fig 16: Disconnecting E7 ECM Connector

Remove the integration relay from the engine room relay block.

Check the harness and connectors between the canister connector and the EFI M relay.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-9 (VLVB) - 3I-8 (EFI M relay)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
V7-9 (VLVB) or 3I-8 (EFI M relay) - Body ground	10 kΩ or higher

Reconnect the canister connector.
Reconnect the ECM connector.
Reinstall the integration relay.

NG: Go to step 30

OK: Go to step 31

Fig 17: Identifying Location Of Integration Relay From Engine Room Relay Block

REPAIR OR REPLACE HARNESS OR CONNECTOR
NEXT: Go to step 34
REPLACE ECM
Replace the ECM (see REMOVAL ).

NEXT: Go to step 34
CHECK AND REPLACE VENT HOSE OR CANISTER FILTER
NEXT: Go to step 34
REPLACE HOSE (PRESSURE SWITCHING VALVE AND FUEL TANK)
PERFORM EVAP SYSTEM CHECK
1. Turn the power switch ON (IG).
2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
3. After the system check is finished, check for pending DTCs.
  OK:
  
  No DTC is present.
NG: Go to step 6

OK: Go to next step
PERFORM EVAP MONITOR DRIVE PATTERN
1. Check that the following conditions are met:
  - Fuel level is 1/8 to 7/8.
  - Engine coolant temperature (ECT) is 4.4 to 35°C (40 to 95°F).
  - Intake air temperature (IAT) is 4.4 to 35°C (40 to 95°F).
  - Difference between ECT and IAT is less than 7°C
2. Enter the check mode. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / CHECK MODE.
3. Allow the engine to idle until the ECT is 75°C (167°F).
4. Drive the vehicle at 50 km/h (30 mph) or faster and maintain that speed for 60 seconds or more.
5. Stop the vehicle. Do not turn the power switch OFF.
6. Check that the EVAP monitor status is complete. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.
7. If the EVAP monitor is incomplete, drive the vehicle at 50 km/h (30 mph) or faster and maintain that speed for 120 seconds or more. After that, recheck the EVAP monitor status.
8. Check for pending DTCs.
  OK:
  
  No DTC is present.
NG: Go to step 2

OK: REPAIR COMPLETED