Leak Detection Pump: Testing and Inspection

EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP INSPECTION[LF. L3]

Airflow Inspection

NOTE: Perform the following test only when directed.

1. Remove the EVAP system leak detection pump.
2. Blow air into port A and verify that there is airflow from port B.
- If not as specified, replace the EVAP system leak detection pump.




3. Blow air into port B and verify that there is airflow from port A.
- If not as specified, replace the EVAP system leak detection pump.
- If as specified, perform the following "Resistance Inspection".

Resistance Inspection

NOTE: Perform the following procedure only when directed.




1. Inspect resistance of the EVAP system leak detection pump.
- If not as specified, replace the EVAP system leak detection pump.
- If as specified, carry out the "Circuit Open/Short Inspection".




1. California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3

2. Except for California emission regulation applicable model with LF ATX

Circuit Open/Short Inspection




1. Disconnect the PCM connector.
2. Inspect the following wiring harness for open or short circuit (continuity check).

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- EVAP system leak detection pump terminal C and PCM terminal 1V*1,1AJ*2
- EVAP system leak detection pump terminal D and PCM terminal 1U*1 1AF:*2
- EVAP system leak detection pump terminal A and main relay terminal A
- EVAP system leak detection pump terminal B and the body ground

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- EVAP system leak detection pump terminal A and the body ground
- EVAP system leak detection pump terminal B and power supply
- EVAP system leak detection pump terminal C and power supply
- EVAP system leak detection pump terminal D and power supply

1. California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3

2. Except for California emission regulation applicable model with LF ATX