DIESEL FUEL <4M4> -Troubleshooting13C-29
Inspection procedure 13
The engine stalls during idling.
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
intake system, EGR system, and power supply.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DPower supply system
DThrottle body assembly
DEGR system
DInjection pump
Inspection procedure 14
Lack of output power
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
fuel system, intake system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DInjection nozzle, fuel filter
DThrottle body assembly
DEGR system
DTurbocharger
DCompression pressure
DInjection timing
DInjection pump
DExistence of mixing foreign objects (water, kerosene) with
the fuel
Inspection procedure 15
Occurrence of abnormal knocking
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
fuel system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DInjection nozzle
DInjection timing
DEGR system
DInjection pump
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13E-1
DIESEL FUEL
<4D5-STEPIII
>
CONTENTS
GENERAL 2.................................
Outline of Change 2............................
GENERAL INFORMATION 2...................
SERVICE SPECIFICATIONS 4.................
SEALANT 4..................................
SPECIAL TOOLS 5...........................
TROUBLESHOOTING 6.......................
ON-VEHICLE SERVICE 55....................
Injection Nozzle Check and Adjustment 55.........
Injection Timing Check and Adjustment 55.........
Idle Speed Check and Adjustment 55.............
Accelerator Pedal Position Sensor (APS)
Adjustment 56.................................
Control Relay Continuity Check 57................
Accelerator Pedal Position Sensor (APS)
Check 57......................................Idle Switch Check 58............................
Boost Air Temperature Sensor (Intake Air
Temperature Sensor) Check 58..................
Engine Coolant Temperature Sensor Check 59.....
Evacuation of Water from Fuel Filter 59............
Fuel Filter Cartridge Replacement 60..............
Evacuation of Air from Fuel Line 60...............
EGR Valve Position Sensor Check 60.............
Fuel Injection Pump Check 61....................
Throttle Solenoid Valve Check 62.................
Throttle Actuator Check 63......................
Variable Geometry Solenoid Valve Check 63.......
EGR Control Solenoid Valve Check 63............
FUEL INJECTION NOZZLE 64.................
FUEL INJECTION PUMP 64...................
CRANKSHAFT POSITION SENSOR 66.........
ENGINE-ECU 66.............................
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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-21
Code No. 43 Timing control valve systemProbable cause
Range of Check
DEngine coolant temperature 80_C or higher and the engine running
Set Conditions
DTarget value minus actual value is 0.64 V or more for 5 secondsDTiming control valve inoperative
DTiming control valve open circuit, short circuit, or
connector contact inoperative
DEngine-ECU inoperative
DBlockage in fuel system
OK
OK
Check and repair the harness between the
control relay and the injection pump
assembly connector.
Timing control valve check
(Refer to P.13E-61.)
Replace the engine-ECU. OK
RepairCheck the following connector:D-110
Check the trouble symptoms.NG NG NG
Check the following connector:B-38NG
Repair
OK
Check the trouble symptoms.
NG
NGMeasure at D-110 engine-ECU connector.
DDisconnect the connector and measure at
the harness side.
DVoltage between 3 and the earth
(Ignition switch: ON)
OK:11 V or higherOK
Measure at B-38 injection pump assembly
connector.
DDisconnect the connector and measure at
the harness side.
DVoltage between 5 and the earth
(Ignition switch: ON)
OK:System voltage
Replace injection pump assembly.
Check and repair the harness between the
engine-ECU and the injection pump
assembly connector.
Fuel system blockage check
DFuel filter blocked
DFuel hose blocked or bent
DFuel tank filter blockedOK
Replace NG
NG
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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-31
INSPECTION PROCEDURE 5
No initial combustion (unable to start)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
glow system, and power supply system.DControl system inoperative
DInjection pump inoperative
DIntake system inoperative
DGlow system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKCheck the following items in order:
DGlow plug, glow plug relay
DBattery
DInjection nozzle
DThrottle body assembly
DInjection pump
DCompression pressure
DExistence of mixing foreign objects (water, kerosene) with
the fuel
INSPECTION PROCEDURE 6
Starting performance is bad when the engine is cold
(unable to start)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, intake system, and glow system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DGlow system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DGlow plug, glow plug relay
DInjection nozzle, fuel filter
DThrottle body assembly
DExistence of starter switch signal input
DEngine oil
DInjection pump
DExistence of mixing foreign objects (water, kerosene) with
the fuel
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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-32
INSPECTION PROCEDURE 7
Starting performance is bad regardless of whether the
engine is hot or cold (unable to start)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, and intake system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection nozzle, fuel filter
DThrottle body assembly
DCompression pressure
DInjection pump
DExistence of mixing foreign objects (water, kerosene) with
the fuel
INSPECTION PROCEDURE 8
Low idling speed when the engine is cold (improper
idling speed)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
and fuel system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection pump
DFuel filter
INSPECTION PROCEDURE 9
High idling speed (improper idling speed)
Probable cause
Probable causes can be found in troubles with control system and injection
pump.DControl system inoperative
DInjection pump inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection pump
DStarter switch signal
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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-33
INSPECTION PROCEDURE 10
Low idling speed (improper idling speed)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
and fuel.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection nozzle
DInjection pump
INSPECTION PROCEDURE 11
Idling instable (rough idling, hunting)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, glow system, intake system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DGlow system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DGlow plug, glow plug relay
DEGR system
DInjection nozzle
DCompression pressure
DValve clearance
DThrottle body assembly
DInjection timing
DFuel line bleeding
DInjection pump
INSPECTION PROCEDURE 12
The engine stalls after running for a while.
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, and intake system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DThrottle body assembly
DFuel filter
DInjection pump
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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-34
INSPECTION PROCEDURE 13
The engine stalls during idling.
Probable cause
Probable causes can be found in troubles with control system, injection pump,
intake system, EGR system, and power supply.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DPower supply system
DThrottle body assembly
DEGR system
DInjection pump
INSPECTION PROCEDURE 14
Lack of output power
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, intake system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection nozzle, fuel filter
DThrottle body assembly
DEGR system
DTurbocharger
DCompression pressure
DInjection timing
DInjection pump
DExistence of mixing foreign objects (water, kerosene) with
the fuel
INSPECTION PROCEDURE 15
Occurrence of abnormal knocking
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13E-8.)
NO
Conduct MUT-IIData list check and an actuator test.
(Refer to P.13E-40, 44.)OKInspect the following items in order:
DInjection nozzle
DInjection timing
DEGR system
DInjection pump
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55A-2
HEATER, AIR
CONDITIONER AND
VENTILATION
CONTENTS
SERVICE SPECIFICATIONS 3.................
LUBRICANTS 3..............................
TROUBLESHOOTING
TROUBLESHOOTING
ON-VEHICLE SERVICE 9.....................
Refrigerant Level Test through Performance Test 9.
Magnetic Clutch Test 10.........................
Receiver Drier Test 10..........................
Compressor Drive Belt Adjustment 10.............
Dual Pressure Switch Check 10..................
Charging 11...................................
Performance Test 15............................
Front Blower Relay and Rear Blower Relay
Continuity Check 18............................
Continuity Check of A/C Compressor Relay and
Condernser Fan Relay 18.......................
PTC Heater Relay Continuity Check 19...........
Idle-up Operation Check
Vacuum Actuator Check
Idle-up Solenoid Valve Check 21.................
Clean Air Filter Replacement Procedure 22........
FRONT A/C 23..............................
Air Conditioner Control Panel Assembly and
A/C Switch 23.................................
Heater Unit and Blower Assembly 26.............
Blower Motor and Resistor 29....................
Inside/Outside Air Changeover Damper Motor 30...
Automatic Compressor-ECU and
Air Thermo Sensor Assembly 31.................
REAR HEATER AND REAR COOLER 32.....
Rear A/C Switch, Front Rear Fan Switch 32.......
Rear A/C Control Unit 34........................
Rear Heater Unit 34............................
Rear Heater Unit and Rear Blower Assembly 37....
HEAT SWITCH 40...........................
COMPRESSOR 41...........................
CONDENSER ASSEMBLY AND
CONDENSER FAN 45........................
REFRIGERANT LINE 47.....................
ENGINE COOLANT TEMPERATURE SWITCH
51 ..........................................
IDLE-UP SYSTEM 53........................
DUCTS 54..................................
VENTILATION 56............................
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