Canister Purge Solenoid: Testing and Inspection

Wiring Diagram:

A faulty canister purge control solenoid will set a code 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 ECM VOLTAGE
a. With ignition "ON," measure voltage between ECM and ground.
Connector (terminal) Voltage
B62(14) & ground min 10 VDC

Should read 10 - 13 Volts.

2. CHECK HARNESS CONNECTOR BETWEEN ECM AND MAIN RELAY
a. Turn ignition "OFF".
b. Disconnect ECM and main relay connectors.
c. Measure resistance between ECM connector and relay connector.

Connector 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 Voltage
Between B52(1) & ground: min 10 VDC
Between B52(2) & ground: min 10 VDC

4. CHECK INPUT SIGNAL FROM PURGE CONTROL SOLENOID
a. Turn ignition "ON".
b. Disconnect main ECM connector.
c. Measure voltage between ECM connector and ground.

Connector Voltage B62(6) & ground: min 7 VDC

Harness:

5. CHECK HARNESS CONNECTOR BETWEEN ECM AND PURGE SOLENOID
a. Turn ignition "OFF".
b. Disconnect ECM and solenoid connectors.
c. Measure resistance between ECM connector and solenoid connector.

Connector Resistance B62(6) & E14(2): 0 ohms