13A-DTC P0458: Evaporative Emission Control System Purge Control Valve Circuit Low Input

DTC P0458: Evaporative Emission Control System Purge Control Valve Circuit Low Input

CIRCUIT OPERATION

The evaporative emission purge solenoid power is supplied from the MFI relay.
The ECM controls ground evaporative emission purge solenoid by turning the power transistor in the ECM "ON" and "OFF".

TECHNICAL DESCRIPTION

In response to a signal from the ECM, the evaporative emission purge solenoid valve controls the flow rate of the purge air to be introduced into the intake manifold.

DESCRIPTIONS OF MONITOR METHODS

The ECM detects open circuit and short malfunction.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Not applicable

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart <Circuit continuity - open circuit and shorted low>

Check Conditions

Engine is running.

Judgment Criterion

The supply voltage is less than 3 volts without the evaporative emission purge solenoid driving for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

None

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 22 .

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

Evaporative emission purge solenoid failed.
Open or shorted evaporative emission purge solenoid circuit, harness damage or connector damage.
ECM failed.

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool (M.U.T.-III), check actuator test item 10: Evaporative Emission Purge Solenoid.

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

(2) Turn the ignition switch to the "ON" position.

(3) Set scan tool (M.U.T.-III) to the actuator test mode for item 10, Evaporative Emission Purge Solenoid.

An operation sound should be heard and vibration should be felt when the evaporative emission purge solenoid is operated.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the solenoid operating properly?

It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

Go to Step 2

STEP 2. Check the evaporative emission purge solenoid.

(1) Disconnect connector, and measure at solenoid side.

(2) Measure the resistance between evaporative emission purge solenoid side connector terminals.

Standard value: 30 - 34 Ω [at 20°C (68°F)]

Is the measured resistance between 30 and 34 Ω [at 20°C (68°F)]?

Go to Step 3

Replace the evaporative emission purge solenoid. Then go to Step 8

STEP 3. Measure the power supply voltage at evaporative emission purge solenoid harness side connector.

(1) Disconnect the evaporative emission purge solenoid connector and measure at the harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal power supply line and ground.

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is battery positive voltage (approximately 12 volts) present?

Go to Step 4

Repair or replace the connector(s), or check and repair the harness of open circuit, and short circuit in power supply line between evaporative emission purge solenoid connector and engine control relay connector. Then go to Step 8

STEP 4. Measure the power supply voltage at ECM connector.

(1) Disconnect connector, and measure at harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal PURG and ground.

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is battery positive voltage (approximately 12 volts) present?

Go to Step 5

Repair or replace the connector(s), or check and repair the harness of open circuit, and short circuit in PURG line between evaporative emission purge solenoid connector and ECM connector. Then go to Step 8

STEP 5. Check of damage in PURG line between evaporative emission purge solenoid connector and ECM connector.

Is the harness wire in good condition?

Go to Step 6

Repair the connector(s) or wiring harness. Then go to Step 8

STEP 6. Check of damage in power supply line between evaporative emission purge solenoid connector and MFI relay connector.

Is the harness wire in good condition?

Go to Step 7

Repair the connector(s) or wiring harness. Then go to Step 8

STEP 7. Using scan tool (M.U.T.-III), check actuator test item 10: Evaporative Emission Purge Solenoid.

(1) Turn the ignition switch to the "ON" position.

(2) Set scan tool (M.U.T.-III) to the actuator test mode for item 10, Evaporative Emission Purge Solenoid.

An operation sound should be heard and vibration should be felt when the evaporative emission purge solenoid is operated.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

Is the solenoid operating properly?

It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

Replace the ECM (Refer to, Removal and Installation

). Then go to Step 8

STEP 8. Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 22

(2) Check the diagnostic trouble code (DTC).

Is DTC P0458 set?

Retry the troubleshooting.

The inspection is complete.