Volvo Symptom D12D US02 Service Manual page 23

Group 20
Step 4: Component and Function Checks
Action:
Check that the fuel quality is within specifications.
Check for air in the fuel system.
Check for carbon monoxide in the coolant.
Check for carbon monoxide in the fuel.
Check the fuel pump. Check for damage or abnormal wear, including end play. Check
the condition of the seals.
Check power supply/ground and wiring harness for EECU, including the connectors and
terminal pins. Check that all components are fault free and properly connected.
Check that the EECU receives the correct signals from the flywheel and camshaft
sensors.
Check the EPG and AVU. Check the function, signal input, power supply, and air supply
Check that the valves for the fuel supply pump function correctly.
Check that the fuel supply pressure is within specifications from idle to full engine speed.
Check that the VCB control valve is regulating the proper oil pressure to the rocker arm
shaft when the VCB is not active.
"Engine Unexpectedly Shuts Down During Deceleration"
page 6
D
C2002641
Refer to:
Group 23: Fuel Quality, Checking
Fuel Supply Pressure, Fault Tracing (Checklist B)
Impact or ID DVD: Information type "Diagnostics",
Group 2309.
Low Compression, Fault Tracing (Checklist G)
Impact or ID DVD: Information type "Diagnostics",
Group 2103.
Fuel Supply Pressure, Fault Tracing (Checklist B),
Impact or ID DVD: Information type "Diagnostics",
Group 2309.
"Fuel Supply Pressure, Fault Tracing" (Checklist
B), Impact or ID DVD: Information type
"Diagnostics" group 2309.
"Engine ECU, Fault Tracing"
Impact or ID DVD: Information type "Diagnostics",
group 2841.
Group 30: Wiring, connectors, and terminals,
checking.
"Cam and Flywheel Signals, Fault Tracing"
(Checklist H), Impact or ID DVD: Information type
"Diagnostics", group 2846.
"Exhaust Pressure Governor, Fault
Tracing"
(Checklist E), Impact or ID DVD:
Information type "Diagnostics", group 2538.
Group 23: Fuel Supply Pump, Checking (valves)
"Fuel Supply Pressure, Fault Tracing" (Checklist
B), Impact or ID DVD: Information type
"Diagnostics" Group 2309.
Group 25: Engine Brake Fault Tracing (Checklist
O) Impact or ID DVD: Information type
"Diagnostics", Group 2531.
(Checklist M),
19