Diagnostic Mode 8: Tank Leak Test

Diagnostic Mode 8: Tank Leak Test

Function
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
- Coolant temperature must be 80 to 110 degree C, Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

- Intake air temperature must not be above the maximum of 60 degree C, Diagnostic mode 1: Check measuring values; PID 15, Intake air temperature.
- Throttle valve angle 12.0 to 16.0%, Diagnostic mode 1: Check measured values; PID 17: Throttle valve position (absolute)

Function test
- Connect diagnostic tester. Scan Tool Connecting
- Start engine and let run at least 15 minutes at idle.
- Under address word 33, select "Diagnostic mode 8: Tank leak test".
- Measuring value "Test-ID 01: select Tank leak test".
- Check specified value of tank leak test at idle.







NOTE:
- The function test can take a few minutes.
- 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. Testing and Inspection
- Leak detection pump (LDP) -V144-, checking. Testing and Inspection