Volvo Symptom D12D US02 Service Manual page 81

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.
Freeze frames of information for specific fault codes may
also be helpful for finding causes 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 77
Step 2: Visual Inspection (System Checks)
Action:
None required.
"Step 3: VCADS Pro Tests" page 78
C2002639
T2020217
D
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
PID 91
PID 94
PID 102
PID 110
PPID 122
PPID 124
SID 1–6
SID 21
SID 22
Refer to:
Instrument cluster or VCADS Pro
VCADS Pro: "Fault Codes, Test Mode"
"Engine Speed Surges at Low or High Idle" page 73
Refer to:
"Engine Speed Surges at Low or High Idle" page 73
Vehicle speed
Accelerator pedal
Fuel supply pressure
Intake manifold pressure
Coolant temperature
VCB compression brake status
Exhaust pressure governor, EPG 1
Unit injectors
Engine position, cam
Engine speed, flywheel
77