Land Rover Common Rail System Crs Denso Manual

Repair Section2–11 6
7 Check the Exhaust Gas Recirculation (EGR)
system. (Refer to the EGR system check proce-
dure issued by the vehicle manufacturer.)Repair or replace the EGR system.
8 Perform the accelerator pedal position sensor
function check. (Refer to the accelerator posi-
tion pedal sensor check procedure issued by
the vehicle manufacturer.)Repair or replace the accelerator position sen-
sor and/or the corresponding circuit.
9 Check the boost pressure sensor and the corre-
sponding circuit....

Repair Section2–11 7
(10) Knocking, abnormal noise
Clogged air cleaner element
Description
Abnormal combustion occurs, and a knocking sound is generated.
Possible Cause
• Engine
• Injector
• Glow control system
• Crankshaft position sensor
1 Repair the glow control system. (Refer to the
glow control system check procedure issued by
the vehicle manufacturer.)Repair the glow control system.
2 Check the crankshaft position sensor. (Refer to
the crankshaft position sensor check procedure
issued by the...

Repair Section2–11 8
(11) Poor fuel economy
Clogged air cleaner element
Description
More fuel than normal is being consumed.
Possible Cause
• Engine
• Injector
• Supply pump
1 Check each injector. (Refer to the injector check
procedure issued by the vehicle manufacturer.)Repair or replace the injector and/or the corre-
sponding circuit.
2 Check the supply pump and the supply pump
drive circuit. (Refer to the supply pump drive cir-
cuit diagram issued by the vehicle manufac-
turer.)Repair or replace the...

Repair Section2–11 9
(12) Black Smoke
Clogged air cleaner element
Description
Black smoke is being exhausted.
Possible Cause
• Injector
• Supply pump
• EGR system
• Engine ECU
• Electronic control throttle
• Rail pressure sensor
• Mass Air Flow (MAF) meter
• Boost pressure sensor
1 Check for air cleaner clogging and/or damage. Replace the air cleaner or repair the air duct.
2 Check the electronic control throttle and the cor-
responding circuit. (Refer to the electronic con-
trol throttle check procedure...

Repair Section2–120
7 Check each injector. (Refer to the injector check
procedure issued by the vehicle manufacturer.)Repair or replace the injector and/or the corre-
sponding circuit.
8 Check the engine ECU power supply. (Refer to
the engine ECU power supply circuit diagram
issued by the vehicle manufacturer.)Repair the engine ECU power supply.
9 Check the supply pump and the supply pump
drive circuit. (Refer to the supply pump drive cir-
cuit diagram issued by the vehicle manufac-
turer.)Repair or...

Repair Section2–121
(13) White smoke
Clogged air cleaner element
Description
White smoke is being exhausted.
Possible Cause
• Fuel filter
• Injector
• Supply pump
• EGR system
• Engine ECU
• Electronic control throttle
• Rail pressure sensor
1 Check the fuel filter. Replace the fuel filter.
2 Check each injector. (Refer to the injector check
procedure issued by the vehicle manufacturer.)Repair or replace the injector and/or the corre-
sponding circuit.
3 Check the Exhaust Gas Recirculation (EGR)
system....

Repair Section2–122
5.2 Other Malfunction Symptoms
Malfunctions caused by components other than the CRS
zThere are occasions when a malfunction that appears to be generated by the CRS is actually caused by a different com-
ponent or system. For instance, engine mechanical parts and the fuel system may cause malfunction symptoms iden-
tical to symptoms generated by the CRS. When troubleshooting, do not simply assume that the source of a malfunction
is the CRS. Consider all causes should be exhaustively...

Repair Section2–123
Faulty idling EnginePoor valve clearance Adjust the valve clearance or replace the
bearing.
Poor valve seat contact Break in, or replace the valve and valve
seat.
Low coolant temperature Perform warm-up operation.
Large difference in cylinder-to-cylinder
compression pressureOverhaul the engine.
Malfunction 
SymptomFaulty ItemCauseAction 

Repair Section2–124
6.  DIAGNOSIS CODES (DTC)
6.1 DTC Chart (Example)
DTC Structure
zP####: Powertrain-related (engine, drive system) 
zU####: Network-related (vehicle communication)
DTC Assignment
zPO###: Determined by SAE/ISO 
zP1###: Determined by manufacturer
zP2###: Determined by manufacturer
zP3###: Mixture of items determined by SAE/ISO and items determined by the vehicle manufacturer.
DTC Chart (example for HINO and TOYOTA vehicles)
zDTC codes that apply to the CRS are listed below (compatible...

Repair Section2–125
P0118 Coolant temperature sensor circuit high voltage
P0119 Coolant temperature sensor circuit intermittent operation
P0120 Accelerator position sensor, switch A circuit related
P0121 Accelerator position sensor switch A circuit range/performance
P0122 Accelerator position sensor switch A circuit low voltage
P0123 Accelerator position sensor switch A circuit high voltage
P0124 Accelerator position sensor switch A circuit intermittent operation
P0168 Fuel temperature too high
P0180...