[28] B4/3 (Fuel Tank Pressure Sensor) : Electrical Fault

[28] B4/3 (Fuel Tank Pressure Sensor) : Electrical Fault

Check Component B4/3 (Fuel Tank Pressure Sensor). (Only (USA))

Test 1 Check Actual Value B4/3 (Fuel Tank Pressure Sensor)
Test 2 Test Voltage Supply of Component B4/3 (Fuel Tank Pressure Sensor)


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 **


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 **