Land Rover Common Rail System Crs Denso Manual

Operation Section1–86
8.4 Throttle Body Function Inspection
< CAUTION >
• Be sure to inspect the function of the throttle body after it has been disassembled and reassembled, or after any of its
components have been removed and reinstalled.
• Verifying Throttle Motor: Verify that the motor generates an operating sound when the ignition switch is turned ON.
Also, verify that there is no interference sound.
(1) Erasing DTCs
1)Connect the DST-1 to the DLC3 connector.
2)Operate in accordance with the...

Operation Section1–87
9.  END OF VOLUME MATERIALS
9.1 Particulate Matter (PM)
zAt high concentration levels, this substance is known to affect the respiratory system. It consists of soluble organic mat-
ter such as unburned oil, unburned diesel fuel, and other soluble organic matter in the exhaust gases, and insoluble
organic matter such as soot (black smoke) and sulfuric acid gas.
9.2 Common Rail Type Fuel Injection System Development History And
The World’s Manufacturers
zThe conventional injection...

Operation Section1–88
9.3 Higher Injection Pressure, Optimized Injection Rates, Higher Injection
Timing Control Precision, Higher Injection Quantity Control Precision
(1) Higher Injection Pressure
• The fuel that is injected from the nozzle turns into finer particles as the fuel injection pressure increases. This improves
combustion and reduces the amount of smoke contained in the exhaust gases. Initially, the maximum injection pres-
sure of the in-line pump (A type) and the distributor pump (VE type)...

Operation Section1–89
• As the injection pressure increases, the injection rate increases accordingly. The increase in injection rate leads to an
increase in the volume of the air-fuel mixture that is created between the start of injection until ignition (the ignition lag
period). Because this mixture is subsequently combusted at once, it creates noise (diesel knock) and NOx. For this
reason, it is necessary to appropriately control the injection rate by maintaining a low injection rate at the beginning...

Operation Section1–90
9.4 Image Of Combustion Chamber Interior
zWith conventional injection methods, because an excessive quantity of fuel was injected in the initial period, the explo-
sion pressure rose excessively, leading to the generation of noise such as engine knocking sounds. To improve this
condition through pilot injection, initially only the necessary and adequate quantity of fuel is injected. At the same time,
the combustion chamber temperature is raised, and main injection combustion is...

Repair Section2–91
1.  DIESEL ENGINE MALFUNCTIONS AND DIAGNOSTIC METH-
ODS (BASIC KNOWLEDGE)
1.1 Combustion State and Malfunction Cause
zDepending on the state of combustion in a diesel engine, diesel knock as well as the color of the exhaust gas may
change. Subsequently, the cause of engine malfunctions can be ascertained from changes in diesel knock and exhaust
gas color.
(1) Diesel Knock
• When fuel mixed with air during the ignition lag period (from the time injection begins until the fuel is...

Repair Section2–92
(2) White Smoke
White smoke: Uncombusted fuel that has been vaporized and then discharged.
• White smoke is generated when combustion occurs at a relatively low temperature, resulting in the exhaust of un-
combusted fuel and oil particles. White smoke is most likely to be generated when combustion chamber temperature
is low.
Source of White Smoke
(3) Black Smoke
Black smoke: Fuel that has been baked into soot and discharged. 
• Black smoke is often referred to as just smoke. Black...

Repair Section2–93
2. DIAGNOSIS OVERVIEW
2.1 Diagnostic Work Flow
Diagnostic Procedures
1 Receive malfunctioning vehicle
2 Question the user to verify the nature of the
malfunction.
3 Does the malfunction reoccur? Refer to Actions for Non-Reoccurring Malfunc-
tions.
4 Verify the malfunction symptom at the actual
vehicle.
5 Use the DST-2 to check for any DTCs. Proceed  with  diagnostics  while  referencing  the
DTC chart in the repair manual for the appropri-
ate vehicle.
6 Use the DST-2 Data Monitor...

Repair Section2–94
2.2 Inquiries
zUse the Common Rail System (CRS) troubleshooting questionnaire to consult with the customer and adequately grasp
the malfunction symptoms.
< NOTE >
Do not ask random questions. Rather, ask questions that will aid in narrowing down the possible malfunctioning system
while making educated guesses based on the actual symptoms.
Questioning points
zUse the following questions as a basis to fully grasp the malfunction.
• What?: Malfunction symptoms
• When?: Date, time,...

Repair Section2–95
(1) Questionnaire
Q002316E
CRS Troubleshooting Questionnaire
Vehicle Model
Previous Vehicles Driven:
Other Customer Information
Indications from the Customer
Questioning
Results
System ConditionsDriving ConditionsRoad Surface
OtherFrequency of Occurrence MIL Illumination No / Yes (                                                               ) 
Main Area and Purpose of Use
Receiving Date
Date Registered
Occurrence DateService History
No / Yes (         times)
Registration No.
Odometer...