Volvo TAD1240GE, Operator'S Manual

Page: 55 / 68

Diagnostic function
53
Code 6.6
Cause: Oil pressure is too low.
Response: The engine shuts down (if this protective fea-
ture has not been disabled by the parameter setting tool).
The alarm lamp lights up.
Corrective action:
•
Check the oil level.
•
Check that the oil filter is not blocked.
•
Check the system pressure valves and the safety
valve in the oil system.
•
Check that the oil sensor is functional.
Code 7.1
Cause: Problem with the compression or the injector for
cylinder #1. Electric error.
Response 1: Cylinder balance is adversely affected ->
uneven running at low RPM and low load.
Response 2: The engine runs on 5 cylinders, sounds
uneven and has decreased performance.
Corrective action:
•
Check fuel feed pressure.
•
Check valve lash.
•
Check the injector and the connector wiring.
•
Do a compression test and check cylinder #1.
Code 7.2
Cause: Problem with the compression or the injector for
cylinder #2. Electric error.
Response 1: Cylinder balance is adversely affected ->
uneven running at low RPM and low load.
Response 2: The engine runs on 5 cylinders, sounds
uneven and has decreased performance.
Corrective action:
•
Check fuel feed pressure.
•
Check valve lash.
•
Check the injector and the connector wiring.
•
Do a compression test and check cylinder #2.
Code 7.3
Cause: Problem with the compression or the injector for
cylinder #3. Electric error.
Response: Cylinder balance is adversely affected -> une-
ven running at low RPM and low load.
The engine runs on 5 cylinders, sounds uneven and has
decreased performance.
Corrective action:
•
Check fuel feed pressure.
•
Check valve lash.
•
Check the injector and the connector wiring.
•
Do a compression test and check cylinder #3.
Code 7.4
Cause: Problem with the compression or the injector for
cylinder #4. Electric error.
Response: Cylinder balance is adversely affected -> une-
ven running at low RPM and low load.
The engine runs on 5 cylinders, sounds uneven and has
decreased performance.
Corrective action:
•
Check fuel feed pressure.
•
Check valve play.
•
Check the injector and the connector wiring.
•
Do a compression test and check cylinder #4.
Code 7.5
Cause: Problem with the compression or the injector for
cylinder #5. Electric error.
Response: Cylinder balance is adversely affected -> une-
ven running at low RPM and low load.
The engine runs on 5 cylinders, sounds uneven and has
decreased performance.
Corrective action:
•
Check the wiring to the injector.
•
Check the connections to the injector.
•
Do a compression test and check cylinder #5.