Inspection Procedure

NOTE:

When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel tank cap.
Do not disassemble the pump module.
The hand-held tester is required to conduct the following diagnostic troubleshooting procedure.

CONFIRM DTC AND EVAP PRESSURE
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch on (IG) (do not start the engine).
3. Turn the tester on.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
5. Read DTCs.
6. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / VAPOR PRESSURE.
7. Read the EVAP (Evaporative Emission) pressure displayed on the tester.
  Result:
  
  Fig 1: DTC Trouble Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. B: Go to step 4 .
2. C: GO TO EVAP INSPECTION PROCEDURE (SEE EVAP INSPECTION PROCEDURE )
3. A: Go to next step.
CHECK HARNESS AND CONNECTOR(PUMP MODULE - ECM)
1. Turn the ignition switch off.
2. Disconnect the A24 ECM connector.
3. Measure the resistance between PPMP terminal of the ECM connector and the body ground.
  
  Fig 2: Measuring Resistance Between PPMP Terminal Of ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Result:
  
  Fig 3: Test Result Trouble Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the ECM connector.
1. B: Go to step 7 .
2. A: Go to next step.
CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM)
1. Disconnect the L12 canister connector.
2. Disconnect the A24 ECM connector.
3. Measure the resistance between PPMP terminal of the ECM connector and the body ground.
  
  Fig 4: Locating Canister Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Measuring Resistance Between PPMP Terminal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Result:
  
  Fig 6: Test Result Suspect Trouble Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the canister connector.
5. Reconnect the ECM connector.
1. A: Go to step 5 .
2. B: Go to step 6 .

CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM)

Disconnect the L12 canister connector.
Turn the ignition switch on (IG).

Measure the voltage and resistance of the L12 canister connector.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connections	Specified Conditions
L12-4 - Body ground	Between 4.5 V and 5.5 V
L12-3 - Body ground	Between 4.5 V and 5.5 V
L12-2 - Body ground	100 Ω or less

Fig 7: Locating L12 Canister Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Identifying Canister Connector

Result:

TEST RESULT

Test Results	Suspected Trouble Areas	Proceed To
Voltage and resistance is within standard ranges	Open in pressure sensor circuit	A
Voltage and resistance is outside standard ranges	Open in wire harness/connector (ECM - pressure sensor)	B

Reconnect the canister connector.

A: Go to step 5
B: Go to step 6 .

REPLACE CHARCOAL CANISTER ASSY
1. NEXT: Go to step 8 .
REPAIR OR REPLACE WIRE HARNESS OR CONNECTORS
HINT:

If the exhaust tail pipe has been removed, go to the next step before reinstalling it.
1. NEXT: Go to step 8 .
REPLACE ECM (SEE REPLACEMENT )
1. NEXT: Go to step 8
CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR)
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch on (IG) and turn the tester on.
3. Wait for at least 60 seconds.
4. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.
HINT:

If no pending DTC is displayed on the tester, the repair has been successfully completed.
1. NEXT: COMPLETED