Volkswagen Golf / Golf GTI / Jetta. Manual — part 254

28-36

Knock Sensor (KS) 2 -G66-

- Disconnect 2-pin connector from

Knock Sensor (KS) 2 -G66-
(arrow)(on intake side of cylinder
head).

- Measure resistance between

terminals 1 and 2 at connector to
Knock Sensor (KS) 2 -G66-.

Specification:

Ignition system, servicing

28-37

If the specifications are not obtained:

- Replace Knock Sensor (KS) -G61- or -G66

Page 28-4

, item 7 or

Page 28-8

, item 17 .

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

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 the specifications are obtained:

- 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.

Ignition system, servicing

28-38

Knock Sensor (KS) 1 -G61-

Knock Sensor (KS) 2 -G66-

- Check wiring for open circuit

between test box and 3-pin
connector referring to Electrical
Wiring Diagrams

terminal 1 and socket 106

terminal 2 and socket 99

terminal 3 and socket 108

Wire resistance: max. 1.5

- Additionally check wires for short

to one another.

Specification:

- Check wiring for open circuit

between test box and 2-pin
connector referring to Electrical
Wiring Diagrams.

terminal 1 and socket 107

terminal 2 and socket 99

Wire resistance: max. 1.5

- Additionally check wires for short

to one another.

Specification:

Ignition system, servicing

28-39

If no wiring malfunction is detected:

- Loosen knock sensor and tighten again to 20

Nm.

- Repeat functional check.

- Check control module DTC memory again.

If malfunction is still present:

- Replace Knock Sensor (KS) -G61- or -G66-

Page 28-4

, item 7 or

Page 28-8

, item 17 .

- 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

.

Ignition system, servicing