AUDI A4 1997 B5 / 1.G AHA Engine Motronic Ignition System Workshop Manual
Manufacturer: AUDI, Model Year: 1997, Model line: A4, Model: AUDI A4 1997 B5 / 1.GPages: 34, PDF Size: 0.19 MB
Page 1 of 34

28-1
 Motronic ignition system Technical data, spark plugs
 
Engine code  
AHA  
  
Engine idle RPM  
 
Idle RPM cannot be adjusted, is corrected by Idle Air Control (IAC) 620 - 740 RPM  
(all-wheel drive)    
   740 - 860 RPM  
(front-wheel drive)    
RPM limit  
 Operates by shutting off fuel injectors approx. 6500 RPM     
Ignition timing  
 Ignition timing cannot be adjusted; it is determined by the Engine Control Module (ECM)     
Firing order  1-4-3-6-2-5     
Spark plugs   Tightening torque   30 Nm (22 ft lb)     
  Part No. 1)   101 000 035 HJ (NGK)     
   Manufacturer's code  
(if applicable)  BKR 6 EKUB (NGK)     
  
Electrode gap - mm   1.6 mm     
  
Maintenance interval    Owner's Manual  
  
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Page 2 of 34

1) Part numbers listed here are for reference only. Always check with your Parts department for the latest information.  
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28-2
      
Camshaft Position (CMP) sensor -G40-, 
checking
 
     
Notes:  
     
Camshaft Position (CMP) sensor -G40- is 
located on the rear of the left cylinder head 
(bank 2). 
     Checking -G163-   page 28
-5 
     
Component location   page 24
-1 
     
Required special tools and test equipment  
     
VAG1598/22 test box 
     Multimeter US1119 (Fluke 83 or equivalent) 
     VW1594 connector test kit 
     Wiring diagrams 
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28-3
      
Checking  
     
-  Disconnect 3-pin harness connector from 
Camshaft Position (CMP) sensor -G40-. 
    
If voltage is OK:  -  Connect multimeter US1119 (Fluke 83 or equivalent) to measure 
voltage across CMP connector terminals 1 (B+) and 3 (Ground), using 
adapters from VW1594 connector test kit. 
-  Switch ignition on.
-  Measure voltage between terminals 1 and 3.
   Specified value: 9-14.5 volts
-  Switch ignition off.
-  Connect VAG1598/22 test box to Motronic ECM harness connector   
page 01
-67
 . 
-  Check wiring for open circuit between ECM/test box and 3-pin harness 
connector, according to wiring diagram. 
 
Connector terminal 1 to ECM/test box socket 11
 Connector terminal 2 to ECM/test box socket 44
 Connector terminal 3 to ECM/test box socket 14
 Specified value: max. 1.5 
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28-4
 
    
If wiring is OK (and voltage across terminals 1 and 3 is OK):  
If wiring is OK (but still no voltage across terminals 1 and 3):  -  Check wiring for short circuit between ECM/test box and 3-pin harness 
connector, according to wiring diagram. 
 
Connector terminal 3 to ECM/test box socket 44
 Connector terminal 3 to ECM/test box socket 11
 Connector terminal 2 to ECM/test box socket 11
 Specified value:   
-  Replace Camshaft Position (CMP) sensor -G40-.
-  Replace Motronic ECM -J220-   page 01
-68
 .
-  Carry out adaptation of throttle valve control module to ECM   page 
24
-150
 . 
- Check readiness code   page 01
-70
 .
   If Diagnostic Trouble Code (DTC) memory has been erased, or ECM 
has been disconnected, generate new readiness code   page 01
-73
 . 
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28-5
      
Camshaft Position (CMP) sensor 2 -
G163-, checking
 
     
Notes:  
     
Camshaft Position (CMP) sensor 2 -G163- is 
located on the front of the right cylinder head 
(Bank 1). 
     Checking -G40-   page 28
-2 
     
Component location   page 24
-1 
     
Required special tools and test equipment  
     
VAG1598/22 test box 
     Multimeter US1119 (Fluke 83 or equivalent) 
     VW1594 connector test kit 
     Wiring diagrams 
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28-6
      
Checking  
     
-  Disconnect 3-pin harness connector from 
Camshaft Position (CMP) sensor 2 -G163-. 
    
If voltage is OK:  -  Connect multimeter US1119 (Fluke 83 or equivalent) to measure 
voltage across CMP connector terminals 1 (B+) and 3 (Ground), using 
adapters from VW1594 connector test kit. 
-  Switch ignition on.
-  Measure voltage between terminals 1 and 3.
   Specified value: 9-14.5 volts
-  Switch ignition off.
-  Connect VAG1598/22 test box to Motronic ECM harness connector   
page 01
-67
 . 
-  Check wiring for open circuit between ECM/test box and 3-pin harness 
connector, according to wiring diagram. 
 
Connector terminal 1 to ECM/test box socket 11
 Connector terminal 2 to ECM/test box socket 76
 Connector terminal 3 to ECM/test box socket 67
 Specified value: max. 1.5 
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28-7
 
    
If wiring is OK (and voltage across terminals 1 and 3 is OK):  
If wiring is OK (but still no voltage across terminals 1 and 3):  -  Check wiring for short circuit between ECM/test box and 3-pin harness 
connector, according to wiring diagram. 
 
Connector terminal 3 to ECM/test box socket 76
 Connector terminal 3 to ECM/test box socket 11
 Connector terminal 2 to ECM/test box socket 11
 Specified value:   
-  Replace Camshaft Position (CMP) sensor 2 -G163-.
-  Replace Motronic ECM -J220-   page 01
-68
 .
-  Carry out adaptation of throttle valve control module to ECM   page 
24
-150
 . 
- Check readiness code   page 01
-70
 .
   If Diagnostic Trouble Code (DTC) memory has been erased, or ECM 
has been disconnected, generate new readiness code   page 01
-73
 . 
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Page 9 of 34

28-8
      
Knock sensor and knock sensor control, 
checking
 
     
Required special tools and test equipment  
     
VAG1551/1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     VAG1598/22 test box 
     Multimeter US1119 (Fluke 83 or equivalent) 
     VW1594 connector test kit 
     Wiring diagrams 
     
Checking  
     
-  Connect VAG1551/1552 Scan Tool (ST) and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with engine 
running at idle)   page 01
-8 . 
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" 
function 08, and press -Q- button to confirm input. 
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Page 10 of 34

Read Measurin
g Value Block 
HELP
Input display group number XXX
    
Indicated on display  
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