Volvo Symptom D12D US02 Service Manual page 11

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.
Fault tracing using relevant service information
should always be carried out for relevant fault codes.
Components/functions of special interest:
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.
See "MID 144 Fault Codes", Impact or ID DVD: Information type "Diagnostics", group
3649.
Check inactive codes with high number of occurrences.
Note: Trucks equipped with Body Builder Modules (BBM)
has two inputs for engine shutdown. One always active
and one programmable.
The first input (always active) pin BBA-6, if 12 volts is
applied to this input engine shutdown will occur.
The second input (programmable) pin BBA-27, if ground
signal is applied to this input engine shutdown will occur
(only if parameter IL is programmed to "YES" enabled).
Step 2: Visual Inspection (System Checks)
C2002639
T2020217
D
•
MID 128, Engine ECU
PID 94
PPID 122
PPID 124
PID 224
SID 1 -6
SID 21
SID 22
SID 240
SID 253
SID 254
•
MID 144, Vehicle ECU
PSID 200
Note: If there is a communication problem with VCADS or
EECU information that cannot be read from the instrument
cluster, it is likely that the EECU has lost supply voltage
or ground connections.
Refer to:
Instrument cluster or VCADS Pro
VCADS Pro: "Fault Codes, Test Mode"
"Step 2: Visual Inspection (System Checks)" page 7
"Engine Does Not Start" page 5
Fuel supply pressure
VCB compression brake status
Exhaust pressure governor, EPG 1
Electronic Immobilizer
Unit injectors
Engine position (cam)
Engine speed sensor (flywheel)
Engine ECU program memory
Data Set Memory EEPROM
Engine ECU
J1939 Control Data link, Engine ECU
7