AUDI A4 1999 B5 / 1.G AFC Engine Crankshaft Position Sensor Checking Workshop Manual

28-19


Crankshaft Position (CKP)
sensor, checking
Component locations page 28
-1 .

All sensors correctly installed, securely
connected

- Disconnect (black) harness connector.

If the specified value is not obtained:
If the specified value is obtained:
If the specified value is not obtained: - Switch Fluke 83 multimeter to resistance range and connect between
CKP sensor connector terminals 1 and 2 (in connector bracket) using
jumper wires from VW 1594 test kit.

Specified value: approx.1000 - Replace Crankshaft Position (CKP) sensor.
- Connect multimeter between terminal 1 and 3 (GND), then between
terminals 2 and 3 (GND).

Specified value: infinite (open)- Replace Crankshaft Position (CKP) sensor.
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If the specified value is obtained:
- Check wiring for continuity or short between CKP sensor and ECM
using wiring diagram.
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28-20

- Connect VAG 1598/19 test box to ECM harness
connector page 01
-255
.

If the specified values are not obtained: - Check CKP sensor shielding for continuity by connecting multimeter
between terminal 3 and engine Ground (GND).

Specified value: max. 1 - Check wiring for continuity between CKP sensor connector terminal 1
and test box socket A9, then between CKP sensor connector terminal
2 and test box socket A10.

Specified value: max. 1

If wiring is OK: - Eliminate short or open circuit in wiring.
CKP sensor terminal
number ECM connector A or engine ground
(GND)
1 A9
2 A10
3 Engine Ground (GND)
- Replace ECM page 01
-265
.
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(CKP
) sensor, checkin
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