Volkswagen Golf / Golf GTI / Jetta. Manual — part 197

24-42

Checking resistance

If the specification is not obtained:

If the specification is obtained:

- Check sensor heater wire

resistance at connector terminals
3 and 4 to Oxygen Sensor (O2S).
Specification: 2.5 to 10.0

(at

room temperature).

- Replace Oxygen Sensor (O2S) 1,

Bank 1 before Three Way
Catalytic Converter (TWC) -G39-

Page 24-19

, item 20 .

- Check DTC memory, repair

malfunctions if necessary and
then erase DTC memory

Page

01-23

.

- Erase learned values and adapt

Motronic Engine Control Module
(ECM) -J220- again

Page 24-

182

.

- Read readiness code

Page 01-

146

. If DTC memory has been

erased or Motronic Engine
Control Module (ECM) -J220- was
disconnected from battery
positive (B+), readiness code
must be generated again

Page

01-149

.

Components, checking

24-43

Checking voltage supply

If no voltage is present:

Repair Manual, Electrical

Equipment; Repair Group 92

- Connect multimeter to measure

voltage at terminals 3 and 4
(connector to Motronic Engine
Control Module (ECM) -J220-)
using adapter cables from VAG
1594.

- Start engine and run at idle

speed.

- Measure voltage supply and

observe display group 41, display
zone 2.

Display Htg.bC.ON: Specification:

11.0 to 14.5 V

Display Htg.bC.ON / Htg.bC.OFF

(alternating): Specification:
Between 0.0 to 12.0 V fluctuating

- Switch off ignition.

- Remove wiper arms and cowl

panel:

- Connect VAG 1598/31 test box to

control module wiring harness.
Engine Control Module (ECM) -
J220- remains disconnected.

Components, checking

24-44

If the specification is obtained:

If no wiring malfunction is detected:

- Check wiring for open circuit

between test box and 6-pin
connector according to Electrical
Wiring Diagrams. Terminal 4 and
socket 5

Wire resistance: max. 1.5

- Check wire for open circuit

between 6-pin connector terminal
3 and Fuel Pump (FP) -J17-
referring to Electrical Wiring
Diagrams.

Wire resistance: max. 1.5

- Replace Motronic Engine Control

Module (ECM) -J220-

Page 24-

173

.

- Check DTC memory, repair

malfunctions if necessary and
then erase DTC memory

Page

01-23

.

- Erase learned values and adapt

Motronic Engine Control Module
(ECM) -J220- again

Page 24-

182

.

- Read readiness code

Page 01-

146

. If DTC memory has been

erased or Motronic Engine
Control Module (ECM) -J220- was
disconnected from battery
positive (B+), readiness code
must be generated again

Page

01-149

.

Components, checking

24-45

Oxygen Sensor (O2S) heating for
Oxygen Sensor (O2S) Behind Three Way
Catalytic Converter (TWC) -G130-,
checking

Note:

The vehicle must be raised to gain access to

the Oxygen Sensor (O2S) connector.

Only gold plated terminals may be used when

servicing Oxygen Sensor (O2S) connector
terminals 3 and 4.

Special tools and equipment

Note:

All functions which could previously be performed
with VAG 1551/1552 can also be performed with
the VAS 5051.

VAG 1551 Scan tool (or VAG 1552) with VAG

1551/3 adapter cable

VAG 1526 or Fluke 83 Hand multimeter or VAG

1715 multimeter

VAG 1594 Adapter set

VAG 1598/31 Test box

Electrical Wiring Diagrams

Components, checking