Volvo Symptom D12D US02 Service Manual page 15

Group 20
Step 1: Fault Code Readings
Active and inactive fault codes which are registered can
point to faults, but can also facilitate tracing the symptom.
Action:
Check for active or inactive fault codes related to symptoms.
See "MID 128 Fault Codes", Impact or ID DVD: Information type "Diagnostics", group
2841.
Check inactive codes with high occurrences.
"Step 2: Visual Inspection (System Checks)" page 11
Step 2: Visual Inspection (System Checks)
Action:
Check the fuel lines for damage, leakage, or restrictions. Also check that connections
and seals are correctly installed.
Check that the EECU cable harness (including connectors and pins) is fault free and
correctly connected.
"Step 3: VCADS Pro Tests" page 12
C2002639
T2020217
D
Freeze frames with information for specific fault codes
can also assist in tracing causes of the symptom.
Fault tracing using relevant service information
must always be carried out for relevant fault codes.
Components/functions of special interest:
•
MID 128, Engine ECU
PID 45
PID 94
PPID 122
PPID 124
SID 21
SID 22
SID 70
SID 71
SID 231
Refer to:
Instrument cluster or VCADS Pro
VCADS Pro: "Fault Codes, Test Mode"
"Engine Difficult to Start" page 5
Refer to:
"Engine Difficult to Start" page 5
Preheater status
Fuel supply pressure
VCB compression brake status
Exhaust pressure governor, EPG 1
Engine position, cam
Engine speed, flywheel
Preheater element, 1
Preheater element, 2
SAE J1939 Control Link
11