P1002

DIAGNOSTIC TROUBLE CODES P1001, P1002
EVAP canister purge valve, control module output, no continuity or shorting to ground/batt+

Fault Symptom.
The CHECK ENGINE lamp (MIL) is on.

Condition
In the event of a short circuit or open circuit a diagnostic trouble code will be generated.

Diagnostic Procedure.
1. Connect the Scan Tool.
Ignition switch in the ON position.
Select "ACTIVATE".
Select "EVAP VALVE".
The valve should be activated for 30 seconds at a frequency of 0.5 Hz.
Listen for the sound of the valve clicking.

If the valve clicks, proceed to step 3.
If the valve does not click, continue with step 2.





2. Check the valve's electrical interface.
Unplug connector H6-5 (located behind the right-hand direction indicator).
Check the following three steps:
- Check the resistance of the valve.
Measure the resistance across pins 5 and 6 of the male connector.
Nominal resistance is 26 ± 3 ohms.

If the resistance is not OK, check the wiring between connector H6-5 and the valve for continuity.
If the wiring is OK, fit a new valve.

- Check the power supply.
Connect the test lamp across pin 6 of the female connector and battery negative.
The test lamp should light up.

If it does not, check, the lead between pin 6 of the female connector and crimped connection J37.

- Check the ground connection.
The valve is grounded via pin 5 of the control module.
Connect the test lamp across pins 5 and 6 of the female connector.
Select "ACTIVATE".
Select "EVAP VALVE".
The test lamp should flash at a frequency of 0.5 Hz for 30 seconds.

If it does not, check the wiring between pin 5 of the female connector and pin 5 of the control module for continuity/shorting.

3. Clear the diagnostic trouble code and drive the car to see whether the DTC is generated again.

If the diagnostic trouble code is generated again, continue at "Procedure Before ECM Replacement". Component Tests
If the trouble code is not generated again the remedial measure taken was correct, otherwise the fault is of intermittent type.