AUDI A4 1997 B5 / 1.G APB Engine Valve Gear Service Manual PDF

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- Disconnect connector from solenoid valve.

If specified value is not obtained:
Checking voltage supply - Connect multimeter at valve for resistance measurement.

Specified value: 10 ... 18
- Replace valve.
- Disconnect connector from solenoid valve.

If LED does not light: - Connect VAG 1527B voltage tester as follows:Harness connector
terminal
Measure to
1 Engine Ground (GND)
- Operate starter briefly.

LED must light.
- Perform following tests marked with dots:
Check fuse of solenoid valves for camshaft adjustment.
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Electrical Wiring Diagrams, Troubleshooting & Component Locations
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Electrical Wiring Diagrams, Troubleshooting & Component Locations
If no malfunctions are detected:
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition,
Engine Code(s): APB, Repair Group 24

Check wire connection from terminal 1 of connector via fuse -S234-
(in fuse holder, socket 34) to Fuel Pump (FP) relay for open circuit:
- Repair open circuit if necessary.
- Check Fuel Pump (FP) relay.
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Checking activation

Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition,
Engine Code(s): APB, Repair Group 01

If LED does not blink or if it remains constantly lit:
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition,
Engine Code(s): APB, Repair Group 24
- Connect VAG 1527B voltage tester between terminal 1 (+) and 2.
- Initiate output Diagnostic Test Mode (DTM) and activate valve for
camshaft adjustment.

LED must blink.
- Connect VAG 1598/31 test box at wiring harness to ECM, do not
connect ECM.
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Valve 1 for camshaft adjustment -N205- and valve 2 for camshaft
adjustment -N208-
If wire connection is OK:
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): APB, Repair Group 24

If no malfunctions are detected: - Check following wire connections for open circuit and short circuit to
Ground (GND) and B+:
Harness connector
terminal
VAG 1598/31 or test box
Bushing
2 Electrical Wiring Diagrams, Troubleshooting
&Component Locations
- Repair Ground (GND) connection or open circuit if necessary.
- Replace Engine Control Module (ECM).- Replace mechanical camshaft adjuster.
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Camshafts and camshaft adjusters,
removing and installing


Removing

Cylinder head installed

Repair Manual, Body Exterior, Repair Group 63

Repair Manual, Body Exterior, Repair Group 50
Left cylinder head - Remove noise insulation panel -arrows-.
- Remove front bumper
- Move lock carrier to service position- Remove ribbed belt Page 13
-1 .
- Remove toothed belt Page 13
-4 .
- Remove left-hand cylinder head cover Page 15
-22
.
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Right cylinder head

- Remove right-hand cylinder head cover Page
15
-25


All:

- Unbolt Hall sensor housing (10 Nm).

- Remove bolt securing Hall sensor rotor (20 Nm)
and carefully lever off rotor using a screwdriver.

- Insert camshaft clamp 3391 in securing plates of
two camshafts.

- Loosen both camshaft bolts and remove approx.
5 turns.

- Take out camshaft clamp 3391.
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Make sure that the retaining catches do not break off when levering out
the oil lines. - Pull off both camshaft sprockets with special tool T40001.
- Using a screwdriver, carefully pry oil feed lines for camshaft bearings
out of camshaft bearings.

Note:
Do not over tighten retainer for chain tensioner, otherwise camshaft
adjuster can be damaged. - Secure camshaft adjuster using retainer for chain tensioner 3366.
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Note:
The two markings on the camshafts must be in line with the two arrows on
the bearing caps.
Notes: - Check TDC position of camshafts once again.
- Clean drive chain and camshaft chain sprockets in vicinity of arrows on
bearing caps and mark position of chain on sprockets with paint
opposite two arrows.

The distance between the two arrows (and thus between the paint
markings) is 16 rollers on the chain. The notch on the exhaust camshaft is offset slightly towards the inside
in relation to chain roller -1-. Do not mark the chain with a center punch or by making a notch or
similar.
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Installing - Remove bolts securing camshaft adjuster -6-.
- Remove bearing caps 1, 3, 5 and 7 from inlet and exhaust camshafts
and place them in correct order on a clean surface.
- Loosen bearing caps 2 and 4 alternately and in diagonal sequence,
and remove from both camshafts.
- Take out both camshafts together with camshaft adjuster.

- Replace rubber/metal gasket for camshaft adjuster and apply a thin
coat of sealant D 454 300 A2 to the shaded area.
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