wiring AUDI A4 1999 B5 / 1.G AWM Engine Camshaft Timing Control Workshop Manual

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If specified value is not attained:
If specified value is attained:
Checking power supply
Test requirements:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel Injection & Ignition,
Engine Code(s): AWM, Repair Group 24
- Connect multimeter to valve to measure resistance.
Specified value: 10 to 18
- Replace solenoid valve for camshaft adjuster.
- Check power supply.
Fuse for solenoid valve for camshaft adjustment OK Fuel pump relay OK.

- Disconnect connector -arrow- from camshaft adjuster.
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If the LED does not light up:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder
If the LED lights up: - Connect voltage tester VAG 1527 B as follows:Connector
contact
Measure to
1 Engine Ground
- Operate starter briefly.
LED should light up.
- Check wiring from contact 1 on connector via fuse to fuel pump relay
for open circuit:
- Correct open circuit, if necessary.
- Check actuation.
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Checking actuation

- Connect voltage tester VAG 1527 B to contacts 1 (positive) and 2 of
connector.
- Initiate output Diagnostic Test Mode (DTM) and activate solenoid valve
for camshaft adjuster.
Output Diagnostic Test Mode Camshaft timin
g control

Display
If the LED lamp does not flash or if it lights up continuously:
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel Injection & Ignition,
Engine Code(s): AWM, Repair Group 24

LED should flash.
- Connect the VAG 1598/31 test box to wiring harness leading to engine
control module (the engine control module should not be connected):
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If the wiring is OK:
If no fault is found: - Check for open circuit and short to positive or Ground in following
wiring connection: Connector
Contact
Test box VAG 1598/31
2 115
- If necessary, correct short circuit to Ground or open circuit.
- Replace engine control module.
- Replace mechanical camshaft adjuster.
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pair&id=AUDI.B5.GE06.15.3