If not as specified, replace the EVAP system leak detection pump. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)
NOTE:
Perform the following procedure only when directed.
1. Remove the battery cover.
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF].)
3. Remove the EVAP system leak detection pump. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)
4. 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. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)
5. 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. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)
If as specified, perform the following “Resistance Inspection”.
1. Inspect resistance of the EVAP system leak detection pump.
If not as specified, replace the EVAP system leak detection pump. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)
If as specified, carry out the “Circuit Open/Short Inspection”.
|
Terminals |
Resistance (ohm) |
|
A—B |
20—50 |
|
A—C |
26.6—32.4 |
|
A—D |
MAX. 118 |
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF].)
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
EVAP system leak detection pump terminal D and PCM terminal 1U
EVAP system leak detection pump terminal A and main relay
EVAP system leak detection pump terminal B and 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 C and body ground
EVAP system leak detection pump terminal D and body ground
EVAP system leak detection pump terminal C and power supply
EVAP system leak detection pump terminal D and power supply
EVAP system leak detection pump terminal A and body ground
EVAP system leak detection pump terminal B and power supply