Mode 8: Tank Leak Test

Mode 8: Tank Leak Test

This diagnostic mode checks the fuel system for leaks.

NOTE: The Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- and Leak detection pump (LDP) -V144- seal the
tank system.

Test requirements:
- No DTCs in DTC memory; check DTC memory see "Mode 3: Check DTC memory". Mode 3: Check DTC Memory
- Intake Air Temperature (IAT) maximum 60 degrees C see "Mode 1: Check measuring values "; "PID 15: Intake air temperature". Mode 1: Check Measured Values
- Coolant temperature 80 to 110 degrees C see "Mode 1: Check measuring values "; "PID 05: Coolant temperature". Mode 1: Check Measured Values
- Throttle valve angle 12.0 to 16.0% see "Mode 1: Check measuring values "; "PID 17: Throttle valve position (absolute)". Mode 1: Check Measured Values

Test sequence
- Connect diagnostic tester.
- Start engine and let run at idle for at least 15 minutes.
- In diagnostic function "33. OBD", select "Mode 8: Tank leak test".
- Select the "Test-ID 01: Tank leak test".
- Check specified value of tank leak test at idle.

Tank leak test Specified value
- Test function active Test OK
- Test function is being
initiated, please wait
- Test off
- Test aborted

NOTE:
- If the accelerator pedal is depressed during the test, the test will be aborted.
- To repeat the tank leak test, switch ignition off and start engine again and let run 15 minutes at idle.

If specified value is obtained:
- End diagnosis and switch ignition off.

If specified value is not obtained:
- EVAP canister system, checking for proper seal. Evaporative Emission (EVAP) Canister System, Checking For Proper Seal
- Check Leak Detection Pump (LDP) -V144-. Leak Detection Pump (LDP) -V144-, Checking

Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check DTC memory See "Mode 3: Check DTC memory". Mode 3: Check DTC Memory
2. If necessary, erase DTC memory see "Mode 4: Reset/erase diagnostic data". Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. Readiness Code, Generating

- End diagnosis and switch ignition off