Volkswagen Golf / Golf GTI / Jetta. Manual — part 249

28-16

Camshaft Position (CMP) Sensor,
checking

Note:

Only gold-plated terminals may be used to
service the terminals in the Camshaft Position
(CMP) Sensor connector.

Special tools, materials and equipment

VAG 1526 or Fluke 83 Hand multimeter or VAG

1715 multimeter

VAG 1594 adapter set

VAG 1598/31 test box

Electrical Wiring Diagrams

Test requirements

The fuses must be OK.

The battery voltage must be at least 11.5 V.

All electrical accessories, e.g. lights and rear

window defroster must be switched off.

If the vehicle is equipped with air conditioning,

it must be turned off.

Camshaft Position (CMP) Sensor malfunction

detected by On Board Diagnostic (OBD)

Page 01-23

.

Ignition system, servicing

28-17

Checking sequence for intake
camshaft Camshaft Position
(CMP) Sensor -G40-

Note:

Mark connector and component
before disconnecting.

- Disconnect 3-pin connector from

Camshaft Position (CMP) Sensor
-G40-, -1-.

- Connect multimeter to measure

voltage at terminals 1 (positive)
and 3 (Ground) of Camshaft
Position (CMP) Sensor connector
using adapter cables from V.A.G
1594.

- Switch on ignition.

Specification: at least 4.5 V

- Switch off ignition.

Ignition system, servicing

28-18

If no voltage is present:

- Remove wiper arms and cowl

panel:

Repair Manual, Electrical

Equipment; Repair Group 92

- Connect VAG 1598/31 test box to

control module wiring harness.
Engine Control Module (ECM)
remains disconnected.

- Check wiring for open circuit

between test box and connector
referring to Electrical Wiring
Diagrams.

terminal 1 and socket 98

terminal 2 and socket 86

terminal 3 and socket 108

Wire resistance: max. 1.5

Ignition system, servicing

28-19

- Additionally check wires for short to one

another.

Specification:

If no wiring malfunction is detected and voltage

was present between terminals 1 and 3:

- Replace Camshaft Position (CMP) Sensor -G40-

Page 28-7

, item 16 .

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

Page

01-23

.

- Read readiness code

Page 01-146

. If DTC

memory has been erased or Engine Control
Module (ECM) was disconnected from battery
positive, readiness code must be generated
again

Page 01-149

.

If no wiring malfunction is detected and no

voltage was present between terminals 1 and 3:

- Replace Engine Control Module (ECM)

Page

24-173

.

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

Page

01-23

.

- Erase learned values and adapt Engine Control

Module (ECM) again

Page 24-182

.

Ignition system, servicing