|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
10
|
KNOCK CONTROL
|
Engine running at idle speed, operating temperature
Switch off all consumers
Accelerate (full throttle briefly)
|
DISABLED
ENABLED
|
16, 23
|
20, 1
|
|
|
Note: The noise values recorded by knock sensor P46
are transferred to control unit K69 via Ter. 1 and Ter. 20 and are evaluated
there. If a defined noise value is exceeded, the DISABLED display on TECH 1 changes to ENABLED.
|
|
Notes on Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
|
Trouble code 16:
· Check
that knock sensor is correctly firmly seated in engine block
|
Firm seat
|
· Knock
sensor fastening to engine block faulty
|
|
|
· Check
lead connection between knock sensor plug and control unit plug
Note: For this, the wiring trough on the
cylinder head must be released and lifted.
|
Firm connection
|
· Short
circuit to + battery voltage or ground
· Lead
interruption
|
|
|
Trouble code 23
|
Nominal values are attained
|
· Control
unit defective
· Control
unit defective (knock amplifier)
|
|
|
|
|
|
|
|
|
|
|
