28-27
Engine Control Module (ECM)
voltage supply, checking
Note:
To check the ECM voltage supply Repair
Group 01, Read measuring value block, display
group 001, display field 4.
Fuse for ECM OK
- Connect test box VAG 1598/19 to ECM wiring
harness page 01
-255
.
- Switch ignition on.
- Connect VAG 1527B voltage tester between test
box socket D10 (B+) and Ground (GND).
Voltage tester must light up
If voltage tester does not light up:
If voltage tester lights up: - Check for open circuit using wiring diagram, and repair as necessary.
-
Connect voltage tester between test box socket D10 (B+) and then in
sequence to test box Ground (GND) sockets A19, D3, D7, D12, E3, E7
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11/23/2002 htt
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