Evaporative Purge Regulator Valve, Checking
Evaporative Purge Regulator Valve, Checking
Observe all safety precautions: => [ Safety Precautions ] Generic Scan Tool
View clean working conditions: => [ Clean Working Conditions ] Clean Working Conditions
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools, testers and auxiliary items required
• Multimeter
• Wiring diagram.
Test requirements
• The Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) fuse OK.
• The ignition switched off.
• Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) is supplied via the Engine Component Power Supply Relay (J757).
Test procedure
- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check
Start diagnosis
- Remove the engine covers. Refer to the appropriate service manual.
- Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector.
Checking internal resistance
- Using a Multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) terminals 1 and 2 for resistance.
Specified value: 17.0 to 25.0 ohms.
If the specified value was Not obtained:
- Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80). Refer to the appropriate service manual.
- Go to Final procedures
If the specified value was obtained:
Checking voltage supply
- Using a Multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector terminal 1 to Ground (GND).
- Start the Engine.
Specified value: battery voltage.
- Switch the ignition off.
If the specified value was Not obtained:
- Check for an open or grounded circuit between terminal 1 and fuse SA16 in Fuse Panel A.
- Check the wiring connection for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
- Repair the circuit and replace any open fuses.
- Go to Final procedures
If the specified value was obtained:
Check Ground (GND) activation
- Using a Multimeter, check the electrical harness connector for voltage.
- Start the Engine.
Specified value: battery voltage.
- Switch the ignition OFF.
If the specified value was obtained:
- Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80). Refer to the appropriate service manual.
- Go to Final procedures
If the specified value was not obtained:
Checking wiring
- Remove the Motronic Engine Control Module (ECM) (J623). Refer to the appropriate service manual.
- Using a Multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector to Motronic Engine Control Module (ECM) (J623) electrical harness connector T94.
Specified value: 1.5 ohms max.
If the specified value was not obtained:
- Check the wiring connection for an open circuit, short circuit to Battery voltage or Ground
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
- Go to Final procedures
If the specified value was obtained:
- If no faults were found Replace the Motronic Engine Control Module (ECM) (J623). Refer to appropriate service manual.
Final procedures
- Reinstall the engine cover with air filter, if necessary. Refer to the appropriate service manual.
- After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 09.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Programming and Relearning.