Volkswagen Golf / Golf GTI / Jetta. Manual - part 185

 

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Volkswagen Golf / Golf GTI / Jetta. Manual - part 185

 

 

24-8

 

  

 

Repair 

Manual, 2.8 
Liter VR6 4V 
Engine 
Mechanical, 
Engine Code
(s): BDF; 
Repair Group 
26

 

26 - Throttle 

Valve 
Control 
Module 
-J338-
 

 Heated 

by 
coolant 

27 - Combi-

valve 

 Secondary 

air 
system: 

28 - Ignition 

coils 
with 
power 
output 
stage (-
N70-, -
N127-, -
N291-, -
N292-, -
N323- 
and -
N324-)
 

   

Page 
28-3

 , 

item 2 

Fuel injection system, servicing

24-9

 

    

Note: 

Fig. 1 

Relay assignment in 
protective housing (on 
left in engine 
compartment)
 

1 - Secondary Air Injection (AIR) 
Pump Relay -J299- 

2 - Motronic Engine Control Module 
(ECM) Power Supply Relay -J271- 

 If tools are necessary to pull 

relays or control modules out of 
the relay plate, first disconnect 
battery Ground (GND) strap. 

 Before disconnecting battery 

Ground (GND) strap obtain code 
for radios with anti-theft coding.
 

Fuel injection system, servicing

24-10

 

  

  

Fuel injection system, general notes

 

  

   Servicing ignition parts:  

  

  

 

Repair Manual, 2.8 Liter VR6 4V Engine 

Mechanical, Engine Code(s): BDF; Repair Group 
28

 

  

   Note:  

  

  

 The Motronic Engine Control Module (ECM) -

J220- is equipped with On Board Diagnostic 
(OBD). Before carrying out repairs and 
troubleshooting the DTC memory must be 
checked. Also the vacuum hoses and 
connections must be checked (unmetered air). 
 

  

  

 Fuel hoses in engine compartment must only 

be secured with spring-type clips. The use of 
clamp or screw-type clips is not permitted.
 

  

  

 Components marked with * are checked via On 

Board Diagnostic (OBD) 

 

Page 01-23

 . 

  

  

 Components marked with **can be checked via 

Output Diagnosis Test Mode (DTM) 

 

Page 

01-100

 . 

  

  

 Do not use sealing compounds containing 

silicone. Particles of silicone drawn into the 
engine, will not be burned in the engine and 
may damage the Oxygen Sensor(s) (O2S). 
 

  

  

 For trouble-free operation of the electrical 

components, a voltage of at least 11.5 V is 
necessary.
 

  

  

 Disconnecting and connecting the battery must 

only be done with the ignition switched off, 
otherwise the Motronic Engine Control Module 
(ECM) -J220- could be damaged.
 

Fuel injection system, servicing

24-11

 

  

  

 Check DTC memory before carrying out repairs 

and when troubleshooting 

 

Page 01-23

 , 

Checking and erasing DTC memory 

  

  

 During some checks it is possible that the 

control module will detect and store a 
Diagnostic Trouble Code (DTC). Therefore, 
after completing all checks and repairs the DTC 
memory must be checked and if necessary, 
erased 

 

Page 01-23

 , Check and erasing DTC 

memory and then generate the readiness code 

 

Page 01-149

 . 

  

  

 If the engine starts, runs for a short period and 

then stops, after troubleshooting, repairs or 
component tests, then the Diagnostic Trouble 
Code (DTC) may lie with the Immobilizer which 
is blocking the Motronic Engine Control Module 
(ECM) -J220-. In such cases the DTC memory 
must be checked and, if necessary, the control 
module adapted.
 

  

  

 

Repair Manual, Electrical Equipment On 

Board Diagnostic (OBD);Repair Group 01

 

  

   Safety precautions 

 

Page 24-33

 .  

  

   Rules for cleanliness 

 

Page 24-36

 .  

 

Page 24-37

 .  

  

   Checking engine operating condition 

 

Page 24-

158

 .  

Fuel injection system, servicing

 

 

 

 

 

 

 

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