Code No. P0443: Purge Control Solenoid Valve System <Vehicles for Hong kong>

OPERATION

Power is supplied to the purge control solenoid valve (terminal No. 2) from the engine control relay (terminal No. 1).

The engine-A/T-ECU (terminal No. 23) makes the power transistor in the unit be in "ON" position, and that makes currents go on the purge control solenoid valve (terminal No. 1).

FUNCTION

In response to a signal from the engine-A/T-ECU, the purge control solenoid valve controls the flow rate of the purge air to be introduced into the surge tank.

TROUBLE JUDGMENT

Check Conditions

Ignition switch is in "ON" position.

Battery positive voltage is 10 V or higher.

Judgment Criterion

The surge voltage (system voltage +2 V) of solenoid coil is not detected when the purge control solenoid valve is turned in OFF position from ON.

PROBABLE CAUSE

Failed purge control solenoid valve

Open/short circuit in purge control solenoid value circuit or loose connector contact

Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. MUT-II/III actuator test

Item 08: Purge control solenoid valve

OK: Operating sound can be heard and the valve vibrates

Q: Is the check result normal?

YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points

).
NO: Go to Step 2

STEP 2. Connector check: B-101 purge control solenoid valve connector

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Repair.

STEP 3: Perform resistance measurement at B-101 purge control solenoid valve connector.

Disconnect connector, and measure at solenoid valve side.

Resistance between terminal No. 1 and No. 2.

OK: 30 - 34 Ω (at 20°C)

Q: Is the check result normal?

YES: Go to Step 4

.
NO: Replace purge control solenoid valve.

STEP 4. Perform voltage measurement at B-101 purge control solenoid valve connector.

Disconnect connector, and measure at harness side.

Ignition switch: ON

Voltage between terminal No. 2 and earth.

OK: System voltage

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Go to Step 5

STEP 5. Connector check: B-17X engine control relay connector

Q: Is the check result normal?

YES:

Check and repair harness between B-101 (terminal No. 2) purge control solenoid valve connector and B-17X (terminal No. 1) engine control relay connector.

Check power line for open/short circuit.

NO: Repair.

STEP 6. Perform voltage measurement at C-134 engine-A/T-ECU connector.

Disconnect connector, and measure at harness side.

Ignition switch: ON

Voltage between terminal No. 23 and earth.

OK: System voltage

Q: Is the check result normal?

YES: Go to Step 8

.
NO: Go to Step 7

STEP 7. Connector check: C-134 engine-A/T-ECU connector

Q: Is the check result normal?

YES:

Check and repair harness between B-101 (terminal No. 1) purge control solenoid valve connector and C-134 (terminal No. 23) engine-A/T-ECU connector.

Check output line for open/short circuit.

NO: Repair.

STEP 8. Connector check: C-134 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 9

.
NO: Repair.

STEP 9. Check harness between B-101 (terminal No. 1) purge control solenoid valve connector and C-134 (terminal No. 23) engine-A/T-ECU connector.

Check output line for damage.

Q: Is the check result normal?

YES: Go to Step 10

.
NO: Repair.

STEP 10. Check harness between B-101 (terminal No. 2) purge control solenoid valve connector and B-17X (terminal No. 1) engine control relay connector.

Check power line for damage.

Q: Is the check result normal?

YES: Go to Step 11

.
NO: Repair.

STEP 11. MUT-II/III actuator test

Item 08: purge control solenoid valve

OK: Operating sound can be heard and the valve vibrates

Q: Is the check result normal?

YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points

).
NO: Replace engine-A/T-ECU.


Code No. P0443: Purge Control Solenoid Valve System <Vehicles for Hong kong>

OPERATION Power is supplied to the purge control solenoid valve (terminal No. 2) from the engine control relay (terminal No. 1). The engine-A/T-ECU (terminal No. 23) makes the power transistor in the unit be in "ON" position, and that makes currents go on the purge control solenoid valve (terminal No. 1).
FUNCTION In response to a signal from the engine-A/T-ECU, the purge control solenoid valve controls the flow rate of the purge air to be introduced into the surge tank.
TROUBLE JUDGMENT Check Conditions Ignition switch is in "ON" position. Battery positive voltage is 10 V or higher. Judgment Criterion The surge voltage (system voltage +2 V) of solenoid coil is not detected when the purge control solenoid valve is turned in OFF position from ON.
PROBABLE CAUSE Failed purge control solenoid valve Open/short circuit in purge control solenoid value circuit or loose connector contact Failed engine-A/T-ECU
	DIAGNOSIS PROCEDURE

	STEP 1. MUT-II/III actuator test Item 08: Purge control solenoid valve OK: Operating sound can be heard and the valve vibrates Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Go to Step 2 .
	STEP 2. Connector check: B-101 purge control solenoid valve connector
	Q: Is the check result normal? YES: Go to Step 3 . NO: Repair.
	STEP 3: Perform resistance measurement at B-101 purge control solenoid valve connector.
	Disconnect connector, and measure at solenoid valve side. Resistance between terminal No. 1 and No. 2. OK: 30 - 34 Ω (at 20°C) Q: Is the check result normal? YES: Go to Step 4 . NO: Replace purge control solenoid valve.
	STEP 4. Perform voltage measurement at B-101 purge control solenoid valve connector.
	Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 2 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 6 . NO: Go to Step 5 .
	STEP 5. Connector check: B-17X engine control relay connector
	Q: Is the check result normal? YES: Check and repair harness between B-101 (terminal No. 2) purge control solenoid valve connector and B-17X (terminal No. 1) engine control relay connector. Check power line for open/short circuit. NO: Repair.
	STEP 6. Perform voltage measurement at C-134 engine-A/T-ECU connector.
	Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 23 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 8 . NO: Go to Step 7 .
	STEP 7. Connector check: C-134 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Check and repair harness between B-101 (terminal No. 1) purge control solenoid valve connector and C-134 (terminal No. 23) engine-A/T-ECU connector. Check output line for open/short circuit. NO: Repair.
	STEP 8. Connector check: C-134 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 9 . NO: Repair.
	STEP 9. Check harness between B-101 (terminal No. 1) purge control solenoid valve connector and C-134 (terminal No. 23) engine-A/T-ECU connector.
	Check output line for damage. Q: Is the check result normal? YES: Go to Step 10 . NO: Repair.
	STEP 10. Check harness between B-101 (terminal No. 2) purge control solenoid valve connector and B-17X (terminal No. 1) engine control relay connector.
	Check power line for damage. Q: Is the check result normal? YES: Go to Step 11 . NO: Repair.
	STEP 11. MUT-II/III actuator test Item 08: purge control solenoid valve OK: Operating sound can be heard and the valve vibrates Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Replace engine-A/T-ECU.