OPERATION
- Power is supplied to the EGR control solenoid valve (terminal No. 1) from the engine control relay (terminal No. 1).
- The engine-A/T-ECU (terminal No. 6) makes the power transistor in the unit be in "ON", and that makes currents go on the EGR control solenoid valve (terminal No. 2).
FUNCTION
- In response to the signal from the engine-A/T-ECU, the EGR control solenoid valve controls the operation of the EGR valve.
PROBABLE CAUSE
- Failed EGR control solenoid valve
- Open/short circuit in EGR control solenoid valve or loose connector contact
- Failed engine-A/T-ECU
DIAGNOSIS PROCEDURE
)
)
Q: Is the check result normal?
YES:
Go to Step 3 
.NO: Repair.
- Disconnect connector, and measure at solenoid valve side.
- Resistance between terminal No. 1 and No. 2.
OK: 29 -
35 Ω
(at 20°C )
Q: Is the check result normal?
YES:
Go to Step 4 .NO: Replace EGR control solenoid valve.
- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 6 .NO: Go to Step 5
.)
Q: Is the check result normal?
YES:
- Check and repair harness between B-102 (terminal No. 1) EGR control solenoid valve connector and B-17X (terminal No. 1) engine control relay connector.
- Check power supply line for open/short circuit.
)
)
- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 6 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 8 .NO: Go to Step 7
.
Q: Is the check result normal?
YES:
- Check and repair harness between B-102 (terminal No. 2) EGR control solenoid valve connector and C-112 (terminal No. 6) engine-A/T-ECU connector.
- Check output line for open/short circuit.
Q: Is the check result normal?
YES:
Go to Step 9 .NO: Repair.
- Check output line for damage.
Q: Is the check result normal?
YES:
Go to Step 10 .NO: Repair.
- Check power supply line for damage.
Q: Is the check result normal?
YES:
Go to Step 11 .NO: Repair.