Land Rover Common Rail System Crs Denso Manual

Repair Section2–96
2.3 Non-Reoccurring Malfunctions
zIn cases where the malfunction does not reoccur, perform the actions below to determine the cause of the malfunction.
Action
Malfunction Symptom
Fully Dis-
charged Bat-
teryEngine will not 
Sta r t
Idle Speed, 
Engine Stall, 
Sputtering, 
Poor Acceler-
ation
Verify that there is no DTC stored in the memory. No Yes Yes
Use the questionnaire as a basis to perform a reoccurrence test in
Reoccurrence mode. Use this data (engine ECU voltage value, etc.)
to...

Repair Section2–97
If it is likely that the malfunction
occurs in rainy or high-tempera-
ture weather, spray the vehicle
with water and verify whether
the malfunction occurs.
< CAUTION >
• Do not spray water directly into the engine compartment.
Spray water in mist form on all surfaces of the radiator to indi-
rectly change temperature and humidity.
• Do not spray water directly on electrical parts.No Yes Yes
Action
Malfunction Symptom
Fully Dis-
charged Bat-
teryEngine will not 
Sta r t
Idle Speed,...

Repair Section2–98
3.  DTC READING (FOR TOYOTA VEHICLES)
3.1 DST-2
zThe DST-2 can check for DTCs in either normal or check mode. In comparison to the normal mode, the check mode
has higher sensitivity in detecting malfunctions. Check mode is used when detection is not possible in normal mode,
regardless of the assumed abnormality.
3.2 DTC Check (Code Reading via the DST-2)
zConnect the DST-2 to the DLC3 connector.
zOperate the DST-2 in accordance with the instructions shown on the display to view the DTC...

Repair Section2–99
4.  TROUBLESHOOTING BY SYSTEM
4.1 Intake System Diagnosis
Clogged air cleaner element
4.2 Fuel System Diagnosis
Clogged air cleaner element1 Clogged air cleaner element Clean or replace the air cleaner.
2 Check the suction path for leaks.
• Suction path joints
• Suction pipes, hosesRepair or replace the malfunctioning compo-
nent.
Normal
1 Fuel system check (remaining fuel quantity, fuel
properties)
• Check the amount of fuel remaining in the
tank.
• Check the condition of the fuel....

Repair Section2–100
2 Fuel tank interior check (modification/additions,
position of fuel pipe inlet/outlet, clogging and
holes)
• Check the tank for modifications or additions.
Consult with the user.
- Fuel inlet/outlet position, tank piping
- Foreign material inside the tank, water sep-
aration
- Tank-internal Zn cladding
- Check the tank-internal fuel piping for the
following.
- Inlet/outlet position (below position E)
- Inlet clogging, bent or deformed piping
(crushed pipe)
- Crushed piping...

Repair Section2–101
(1) Fuel pressure test procedure
• Connect the DST-2 to the vehicle-side test connector.
- With the vehicle idling, verify the rail pressure displayed on the DST-2.
System selection screen: Rail a ECU Data Monitor6 Filter (supply pump inlet) clogging
• Fuel filter
- Check for fuel delivery from the priming
pump.
• Gauze filter
- Visually check for clogging due to foreign
material.Clean the gauze filter, fuel filter and fuel piping
system, or replace the filters.
7 Oil level increase...

Repair Section2–102
(2) Fuel leak check
• Connect the DST-2 to the vehicle-side test connector.
• With the vehicle idling, perform the active test by following the instructions on the DST-2 display.
System selection screen: TCCS a Active Test
• Verify that there are no fuel system leaks during the active test (when fuel pressure is being applied to the rail.)
4.3 Basics of Electrical/Electronic Circuit Checks
(1) ECU terminal voltage and waveform measurements
• When measuring the voltage and resistance...

Repair Section2–103
(2) Open circuit check
• When dealing with a wiring harness open circuit like that depicted in diagram 1, check continuity and/or voltage to
determine the location of the open circuit.
Continuity Check
1)Remove connectors A and C, and then measure resis-
tance between the two.
< NOTE >
Measure resistance while gently shaking the wiring har-
ness up and down, and side-to-side.
2)As shown in diagram 2, there is no continuity (open circuit)
between terminal 1 of connector A and terminal...

Repair Section2–104
Voltage Check
1)For the circuit that applies voltage to the ECU connector ter-
minals, check for an open circuit by performing a voltage
check.
2)As shown in diagram 4, with all connectors connected, mea-
sure the voltage for the ECU 5 V output terminal between
the body ground and terminal 1 of connector A. Next mea-
sure voltage for terminal 1 of connector B and terminal 1 of
connector C in the same fashion.
3)The faulty circuit and measurement results are shown be-
low.
(3) Short...

Repair Section2–105
Ground Continuity Check
1)Remove connector A and connector C, and then mea-
sure the resistance respectively between terminals 1 and 2
of connector A and ground.
< NOTE >
Measure resistance while gently shaking the wiring har-
ness up and down, and side-to-side.
2)As shown in diagram 6, there is continuity between terminal
1 of connector A and the body ground (short circuit). How-
ever, there is no continuity between terminal 2 of connector
A and the body ground. Therefore, there is a...