Test sequence
WARNING: This page is about a different variant/trim than selected.
- Connect V.A.G 1551/1552 (Connecting scan tool and selecting engine electronics control module → Scan Tool V.A.G 1551 , connecting .)
- Run engine at idle speed and press buttons - 0 - and - 1 - to select "Engine electronics" address word 01.
Indicated on display
| Rapid data transfer HELP Select function XX |
- Press buttons - 0 - and - 8 - to select "Read measured value block" function 08 and confirm entry with - Q - button.
Indicated on display
| Read measured value block HELP Input display group number XXX |
- Press buttons - 0 - , - 1 - and - 0 - to select "Display group number 10" and confirm entry with - Q - button.
- Compare display in display field 2 ( BARO Sensor F96 ) with display field 3 ( MAP Sensor G71 ).
| Read measured value block 10 -> 0 mg/H 1027 mbar 1013 mbar 0,0 % |
- Specification: The pressures must be the same (tolerance ± 30 mbar)
If specification is obtained:
- Press → button.
- Press buttons - 0 - and - 6 - to select "End output" function 06 and confirm entry with the - Q - button.
- Switch ignition off.
If value in display field 2 deviates:
- Replace engine control module → Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 , replacing .
Value in display field 3 deviates:
- Press the → button.
- Press buttons - 0 - and - 6 - to select "End output" function 06 and confirm entry with - Q - button.
- Switch ignition off.
- Remove wiper arms and plenum cover: →92 WINDSHIELD WIPER & WASHER SYSTEM
- Connect test box V.A.G 1598/22 (through my 1999) or V.A.G 1598/31 (from my 2000) to control module wiring harness.
- Disconnect 4-pin connector from MAP sensor G71 with Intake Air Temperature (IAT) Sensor G72 - arrow -.
- Check wiring between test box and connector for open circuit according to wiring diagram.
| Test box socket no. | ||
| Terminal | Through MY 1999 | From MY 2000 |
| 3 | 39 | 31 |
| 4 | 40 | 71 |
- Wire resistance: max. 1.5 Ω
- Additionally check wires for short to one another, to vehicle ground and to battery positive (B+).
- Specification: ∞ Ω
- If no wiring malfunction is detected, replace engine control module → Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 , replacing .