DTC    016    Difference Evaluation 2

DTC    020    Glow Plug Malfunction

DTC    021    Glow Plug Output Overload

DTC    022    Glow Plug Output Error

DTC    025    Short in K-line Circuit

DTC    030    Abnormal Combustion Air Blower Motor Speed

DTC    031    Combustion Air Blower Motor Malfunction

DTC    032    Short in Combustion Air Blower Motor Circuit

DTC    034    Combustion Air Blower Motor Output Error

DTC    060    Overheating Control Sensor Malfunction

DTC    061    Short in Overheating Control Sensor Circuit

DTC    064    Flame Sensor Malfunction

DTC    065    Short in Flame Sensor Circuit

DTC    071    Surface Sensor Malfunction

DTC    072    Short in Surface Sensor Circuit

DTC    074    ECU Overheating

DTC    090    ECU Internal Malfunction / Reset Detection

DTC    091    Repeated Resets Detection

DTC    092    ROM Error

DTC    093    RAM Error

DTC    094    Transistor Malfunction

DTC    095    Software Stuck Overflow

DTC    096    Operation Locked Detection

DTC    097    ECU Defects

DTC    098    Main Relay Malfunction

DTC    099    EEPROM Error

for Preparation Click here


DESCRIPTION


DTC No.
DTC Detection Condition
Trouble Area
016
The difference in temperatures detected by the surface sensor and control overheating sensor is 30°C (86°F) or more.
  1. Surface sensor (combustion heater assembly)
  2. Control overheating sensor (combustion heater assembly)
020
Operation stop of the glow plug is detected.
(Open in the circuit)
  1. Glow plug (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
021
Overload on the glow plug or a short in the wire harness that is connected to the glow plug is detected.
  1. Glow plug (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
022
An error is detected in output from the power heater ECU to the glow plug, or a problem with the wire harness that is connected to the glow plug is detected.
  1. Power heater ECU (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
025
A short circuit is detected in the diagnostic communication line in the combustion heater.
Wire harness or connector (combustion heater assembly)
030
Air blower motor speed is out of the allowable range (8800 rpm to 10400 rpm). (An object may be caught in or between parts around the air blower motor.)
Air blower motor (combustion heater assembly)
031
Operation stop of the air blower motor is detected.
(Open in the circuit)
  1. Air blower motor (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
032
A short circuit is detected in the wire harness which is connected to the air blower motor.
Wire harness or connector (combustion heater assembly)
034
An error is detected in output from the power heater ECU to the air blower motor, or a problem with the wire harness that is connected to the air blower motor is detected.
  1. Power heater ECU (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
060
Operation stop of the control overheating sensor is detected.
(Open in the circuit)
Control overheating sensor (combustion heater assembly)
061
A short is detected in the control overheating sensor circuit.
  1. Control overheating sensor (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
064
Operation stop of the flame sensor is detected.
(Open in the circuit)
Flame sensor (combustion heater assembly)
065
A short is detected in the flame sensor circuit.
  1. Flame sensor (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
071
Operation stop of the surface sensor is detected.
(Open in the circuit)
Surface sensor (combustion heater assembly)
072
A short is detected in the surface sensor circuit.
  1. Surface sensor (combustion heater assembly)
  2. Wire harness or connector (combustion heater assembly)
074
The power heater ECU stops operating due to overheating.
Power heater ECU (combustion heater assembly)
090
An internal malfunction of the control unit is detected.
Power heater ECU (combustion heater assembly)
091
Reset operation is repeated too many times.
Power heater ECU (combustion heater assembly)
092
A control unit (ROM) error is detected.
Power heater ECU (combustion heater assembly)
093
A control unit (RAM) error is detected.
Power heater ECU (combustion heater assembly)
094
A transistor malfunction due to frequent operation interruptions is detected.
Power heater ECU (combustion heater assembly)
095
A software stuck overflow is detected.
Power heater ECU (combustion heater assembly)
096
An operation lock due to the absence of valid process is detected.
Power heater ECU (combustion heater assembly)
097
An internal control unit malfunction is detected.
Power heater ECU (combustion heater assembly)
098
A main relay malfunction is detected.
Power heater ECU (combustion heater assembly)
099
An EEPROM error is detected.
Power heater ECU (combustion heater assembly)

INSPECTION PROCEDURE

1.CHECK COMBUSTION HEATER ASSEMBLY

  1. Clear the DTCs stored in the memory using the DTC tester (Click here).

  1. Recheck for DTC (Click here).

    OK:
    DTC is not output.



NG
REPLACE COMBUSTION HEATER ASSEMBLY (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)