Canister Purge Solenoid: Testing and Inspection

Wiring Diagram:

A faulty canister purge control solenoid will set code 35 in the on-board diagnostic system.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Diagnostic Chart:

CANISTER PURGE SOLENOID DIAGNOSTIC CHART


1. CHECK ECU VOLTAGE
a. With ignition "ON," measure voltage between ECU and ground.
Connector (terminal) Voltage
B62(14) & ground min 10 VDC

Should read 10-13V.

2. CHECK HARNESS CONNECTOR BETWEEN ECU AND MAIN RELAY
a. Turn ignition "OFF".
b. Disconnect ECU and main relay connectors.
c. Measure resistance between ECU connector and relay connector.
Connector (terminal) Resistance
B62(14) & B52(4) 0 ohms

3. CHECK POWER SUPPLY TO MAIN RELAY
a. Turn ignition "ON".
b. Disconnect main relay connector.
c. Measure voltage between relay connector and ground.
Connector (terminal) Voltage
B52(1) & ground min 10 VDC
B52(2) & ground min 10 VDC

4. CHECK INPUT SIGNAL FROM PURGE CONTROL SOLENOID
a. Turn ignition "ON".
b. Disconnect main ECU connector.
c. Measure voltage between ECU connector and ground.
Connector (terminal) Voltage
B62(6) & ground min 7 VDC

Harness:

5. CHECK HARNESS CONNECTOR BETWEEN ECU AND PURGE SOLENOID
a. Turn ignition "OFF".
b. Disconnect ECU and solenoid connectors.
c. Measure resistance between ECU connector and solenoid connector.
Connector (terminal) Resistance
B62(6) & E14(2) 0 ohms