Open Circuit

B4/3 (Fuel Tank Pressure Sensor) :: Open Circuit (P0450)

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

Test 1 Test Component B4/3 (Fuel Tank Pressure Sensor) By Actuation.
Test 2 Test Voltage Supply of Component B4/3 (Fuel Tank Pressure Sensor).


1 Test Component B4/3 (Fuel Tank Pressure Sensor) By Actuation.





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! 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.
- The voltage supply of the component N3/10 (ME-SFI control module) is o.k..

Test sequence
- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- (5.5) Pin 5 of 35 <--> Pin 125 of 126 (4.40)
- Switch on ignition.

Specified value
- Voltage[4.75...5.25] 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).
- N3/10 (ME-SFI control module)

** End of test **