Volvo Symptom D12D US02 Service Manual page 65

Group 20
Step 4: Component and Function Checks
Action:
Check that the fuel quality is within specifications.
Check that the engine speed parameter is correctly defined.
Check charge air hoses and connections for damage, restrictions, or signs of engine
oil inside the piping.
Check that the injector trim codes correspond to the injector codes.
Check the fuel supply pump seals, valves, and shaft/gears for damage or wear.
Check the turbocharger compressor wheel for damage or signs of rubbing against
housing; also check end play.
"Engine Does Not Reach Rated Speed" page 50
Step 1: Fault Code Readings
Registered fault codes (whether active or inactive) can
quickly point to faults; however, they also can be a
fault-finding aid for the symptom. Freeze frames of
information for specific fault codes may also be helpful for
finding causes for the symptom.
Fault tracing using relevant service information
should always be carried out for relevant fault codes.
Components/functions of special interest:
•
MID 128, Engine ECU
PID 84 Vehicle speed
PID 91 Accelerator pedal
PID 94 Fuel supply pressure
PID 100 Engine oil pressure
PID 102 Charge air pressure
PID 108 Atmospheric pressure
Action:
Check for active or inactive fault codes related to symptoms.
Check inactive codes with high occurrences.
D
C2002641
PID 110
PID 111
PID 153
PID 175
PPID 122
PPID 124
SID 1-6
SID 146
SID 266
SID 281
•
MID 144, Vehicle ECU
SID 230
Refer to:
Group 23: Fuel Quality, Checking
VCADS Pro: "Parameters programming"
Group 26: Charge Air Pipe, Checking
VCADS Pro: "Parameters programming"
Group 23: Fuel Supply Pump, Checking
Group 25: Turbocharger, Checking
Coolant temperature
Coolant level
Crankcase pressure
Engine oil temperature
Compression brake, VCB
Exhaust pressure governor, EPG 1
Unit injectors
EGR valve 1
EGR valve 2 (D12D)
EGR reed valve (D12D)
Idle validation switch 1
Refer to:
Instrument cluster or VCADS Pro
VCADS Pro: "Fault Codes, Test Mode"
61