Diamante Wagon V6-2972cc 3.0L SOHC (1993)
Canister Purge Solenoid: Testing and Inspection
Purge Control System
Purge Control Solenoid
NOTE: Mark vacuum hose before disconnecting for reference when connecting.
1. Disconnect the vacuum hoses (no stripe and red stripe), from the solenoid valve.
2. Disconnect the solenoid electrical connector, at solenoid.
3. Connect a hand held vacuum pump to the nipple the red striped hose was removed from.
4. Apply a vacuum and check for air tightness when voltage is applied directly to the solenoid (using jumper wires).
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When battery voltage is applied, the vacuum should leak.
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When battery voltage is removed, the vacuum should hold.
5. Verify that the resistance of the solenoid is between 36 - 44 ohms (at 68° F).
Purge Port Vacuum
1.
With the engine coolant temperature between 80 - 95° C (176 - 205° F), disconnect the vacuum hose from the throttle body purge hose nipple and
connect a hand held vacuum pump to the nipple.
2.
Start the engine and increases rpm to 2,500 rpm, while observing vacuum gauge.
3.
Vacuum should increase with engine speed, if not check for obstructions of nipple.
System Testing
Preparation
1. Disconnect the vacuum hose (red stripes) from the throttle body and connect to a vacuum pump (with gauge).
2. Plug the nipple from which the hose is disconnected
Engine Cold Test (Coolant Temperature 40° C (104° F) or less)
1. With engine idling, apply a 375 mm Hg (14.8 in Hg) vacuum.
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Vacuum should hold.
Engine Warm Test (Coolant Temperature 80° C (176° F) or higher)
1. With engine idling, apply a 375 mm Hg (14.8 in Hg) vacuum.
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Vacuum should hold.
2. Within 3 minutes of starting engine, run at 3,000 rpm and apply a vacuum.
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Vacuum should not build or hold.
3. At least 3 minutes after starting engine, run at 3,000 rpm and apply a 375 mm Hg (14.8 in Hg) vacuum.
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Vacuum should hold momentarily, and then bleed off [1].
[1] The vacuum will leak continuously if above 2,200 meters (7,200 feet), or the intake air temperature is 50° C (122° F) or higher.
