Purge Control System Has Leak (Function Chain) : Mechanical Defect In Component Y58/1 (Purge Control Valve)
Purge Control System Has Leak (Function Chain)
Test 1 Check Component B4/3 (Fuel Tank Pressure Sensor). (Only (USA))
Test 2 Check Component Y58/1 (Purge Control Valve).
1 Check Component B4/3 (Fuel Tank Pressure Sensor). (Only (USA))
Test 1-1 Check Actual Value B4/3 (Fuel Tank Pressure Sensor)
Test 1-2 Test Voltage Supply of Component B4/3 (Fuel Tank Pressure Sensor)
1-1 Check Actual Value B4/3 (Fuel Tank Pressure Sensor)
Figure legend
- 019 Vacuum tester
- b Purge line from activated charcoal canister to component Y58/1 (Purge control valve)
- Y58/1 (Purge control valve)
Test sequence
- Switch off ignition.
- Detach purge line to activated charcoal filter at component Y58/1 (Purge control valve) and connect vacuum tester to purge line.
- Switch on ignition.
- Actuate component Y58/4 (Activated charcoal canister shut-off valve). (Operate pushbutton F2.)
Note: Component M4/3 (engine/AC electric suction fan) runs with an on/off ratio of 50 % during the actuations for safety reasons.
Note! Communication with ECU required.
** End of Test **
1-2 Test Voltage Supply of Component B4/3 (Fuel Tank Pressure Sensor)
Test requirement
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Connect socket box to component N3/10 (ME-SFI control module).
- (D.4) 36 <--> 38 (D.6)
- Switch on ignition.
Specified value
- Voltage [4.7...5.3] V
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Inspect cables from component N3/10 (ME-SFI control module) to component B4/3 (Fuel tank pressure sensor).
- B4/3 (Fuel tank pressure sensor)
No
The measured value is not o.k.
Possible cause and remedy
- Inspect cables from component N3/10 (ME-SFI control module) to component B4/3 (Fuel tank pressure sensor).
** End of test **
2 Check Component Y58/1 (Purge Control Valve).
Test 2-1 Actuate Component Y58/1 (Purge Control Valve).
Test 2-2 Test Current Consumption of Component Y58/1 (Purge Control Valve).
Test 2-3 Perform Mechanical Inspection of Component Y58/1 (Purge Control Valve).
Test 2-4 Test Signal Voltage of Component Y58/1 (Purge Control Valve).
2-1 Actuate Component Y58/1 (Purge Control Valve).
Test sequence
- Switch on ignition.
- Actuate component Y58/1 (Purge control valve).(Operate pushbutton F2.)
Note: Component M4/3 (engine/AC electric suction fan) runs with an on/off ratio of 50 % during the actuations for safety reasons.
Note! Communication with ECU required.
2-2 Test Current Consumption of Component Y58/1 (Purge Control Valve).
Test requirement
- Actuation is not okay.
Test sequence
- Switch off ignition.
Connect socket box.
- (A.3) 3 <--> 13 (C.21)
- Switch on ignition.
Specified value
- Amperage [0.3...0.5] A
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Perform mechanical inspection of component Y58/1 (Purge control valve).
No
The measured value is not o.k.
Possible cause and remedy
- Voltage supply of component Y58/1 (Purge control valve) (Wiring diagrams)
- Inspect cables from component N3/10 (ME-SFI control module) to component Y58/1 (Purge control valve).
- Y58/1 (Purge control valve)
** End of Test **
2-3 Perform Mechanical Inspection of Component Y58/1 (Purge Control Valve).
Figure legend
- 019 Vacuum tester
- a 3-point distributor
- b Vacuum line to activated charcoal canister
- Y58/1 (Purge control valve)
Test requirement
- Actuation is o.k.
Test sequence
- Switch off ignition.
- Connect the vacuum tester to the input of component Y58/1 (Purge control valve) with the 3 x distributor.
- Operate engine at idling speed.
- Engine at operating temperature
- Actuate component Y58/1 (Purge control valve), then with key F2.
Note! Communication with ECU required.
2-4 Test Signal Voltage of Component Y58/1 (Purge Control Valve).
Test requirements
- Engine at operating temperature
Test sequence
- Switch off ignition.
- Connection Measuring system
- A4 Blue socket <--> Green socket A7
- Operate engine at idling speed.
Status of relevant actual value:
- Temperature of coolant: Note! Communication with ECU required
Note
- Measuring system: Continue with key F2
** End of Test **