Volvo Symptom D12D US02 Service Manual page 84

Group 20
Step 1: Fault Code Readings
Active and inactive registered fault codes can point to
faults but also be a fault finding aid for the symptom.
Action:
Check for active or inactive fault codes related to symptoms.
Check inactive codes with high number of occurrences.
"Step 2: Visual Inspection (System Checks)" page 80
Step 2: Visual Inspection (System Checks)
Action:
Check that there is sufficient fuel in the tank(s).
"Step 3: VCADS Pro Tests" page 81
80
C2002639
T2020217
D
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 94 Fuel supply pressure
PID 102 Intake manifold pressure
PPID 122 VCB compression brake status
PPID 124 Exhaust pressure governor
SID 1–6 Unit injectors
SID 21 Engine position, cam
SID 22 Engine speed, flywheel
Refer to:
Instrument cluster or VCADS Pro
VCADS Pro: "Fault Codes, Test Mode"
"Engine Runs Unevenly or Misfires" page 73
Refer to:
"Engine Runs Unevenly or Misfires" page 73