DTC 00553 Open Circuit

DTC Code 00553, Mass Air Flow MAF Sensor G70:
Open Circuit, Short To Ground
or
Short To Positive

Special Tools, Testers And Auxiliary Items:
- VAG 1598/18 Test Box adaptor
- Fluke 83 Multimeter or equivalent
- VW 1594 Adaptor kit
- Wiring diagram

Work Sequence:
Display will appear as shown:

Rapid data transfer HELP
Select function XX

- Press 0 and 6 buttons to select Function 06 "End data transfer"
- Press Q button to enter input
- Switch OFF ignition





- Disconnect MAF sensor -2- harness connector -1-
- Switch ON ignition





- Measure MAF sensor voltage between G70 terminals

G70 Terminal Numbers:

- Switch OFF ignition





- Connect VAG 1598/18 Test Box adaptor to ECM wiring harness
- Check wiring for open circuit between VAG 1598/18 Test Box adaptor and harness connector using wiring diagram:
Terminal 1 + socket 19
Terminal 2 + socket 33
Terminal 3 + socket 23
Terminal 5 + socket 1
Terminal 6 + socket 13
Wire resistance: 1.5 ohm maximum

- Check for shorting between wires:
Specification: infinite ohm

If voltage values obtained and wiring OK:
- Replace MAF sensor G70

If specified voltages obtained:
- Replace ECM J248