COMBUSTION TYPE POWER HEATER SYSTEM, Diagnostic DTC:016, 020, 021, 022, 025, 030, 031, 032, 034, 060, 061, 064, 065, 071, 072, 074, 090, 091, 092, 093, 094, 095, 096, 097, 098, 099

DTC Code DTC Name
016 Difference Evaluation 2
020 Glow Plug Malfunction
021 Glow Plug Output Overload
022 Glow Plug Output Error
025 Short in K-line Circuit
030 Abnormal Combustion Air Blower Motor Speed
031 Combustion Air Blower Motor Malfunction
032 Short in Combustion Air Blower Motor Circuit
034 Combustion Air Blower Motor Output Error
060 Overheating Control Sensor Malfunction
061 Short in Overheating Control Sensor Circuit
064 Flame Sensor Malfunction
065 Short in Flame Sensor Circuit
071 Surface Sensor Malfunction
072 Short in Surface Sensor Circuit
074 ECU Overheating
090 ECU Internal Malfunction / Reset Detection
091 Repeated Resets Detection
092 ROM Error
093 RAM Error
094 Transistor Malfunction
095 Software Stuck Overflow
096 Operation Locked Detection
097 ECU Defects
098 Main Relay Malfunction
099 EEPROM Error

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
016 The difference in temperatures detected by the surface sensor and temperature control sensor is 30°C (86°F) or more.

  • Heater assembly (surface sensor)

  • Heater assembly (temperature control sensor)
020 Operation stop of the glow plug is detected (open in the circuit).

  • Heater assembly (glow plug)

  • Harness or connector
021 Overload on the glow plug or a short in the wire harness that is connected to the glow plug is detected.

  • Heater assembly (glow plug)

  • Harness or connector
022 An error is detected in the output from the ECU to the glow plug, or a problem with the wire harness that is connected to the glow plug is detected.

  • Heater assembly (ECU)

  • Harness or connector
025 A short circuit is detected in the diagnostic communication line in the heater assembly.

  • Heater assembly

  • Harness or connector
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). Heater assembly (air blower motor)
031 Operation stop of the air blower motor is detected (open in the circuit).

  • Heater assembly (air blower motor)

  • Harness or connector
032 A short circuit is detected in the wire harness which is connected to the air blower motor. Harness or connector
034 An error is detected in the output from the ECU to the air blower motor, or a problem with the wire harness that is connected to the air blower motor is detected.

  • Heater assembly (ECU)

  • Harness or connector
060 Operation stop of the temperature control sensor is detected (open in the circuit). Heater assembly (temperature control sensor)
061 A short is detected in the temperature control sensor circuit.

  • Heater assembly (temperature control sensor)

  • Harness or connector
064 Operation stop of the flame sensor is detected (open in the circuit). Heater assembly (flame sensor)
065 A short is detected in the flame sensor circuit.

  • Heater assembly (flame sensor)

  • Harness or connector
071 Operation stop of the surface sensor is detected (open in the circuit). Heater assembly (surface sensor)
072 A short is detected in the surface sensor circuit.

  • Heater assembly (surface sensor)

  • Harness or connector
074 The ECU stops operating due to overheating. Heater assembly (ECU)
090 An internal malfunction of the control unit is detected. Heater assembly (ECU)
091 Reset operation is repeated too many times. Heater assembly (ECU)
092 A control unit (ROM) error is detected. Heater assembly (ECU)
093 A control unit (RAM) error is detected. Heater assembly (ECU)
094 A transistor malfunction due to frequent operation interruptions is detected. Heater assembly (ECU)
095 A software stuck overflow is detected. Heater assembly (ECU)
096 An operation lock due to the absence of a valid process is detected. Heater assembly (ECU)
097 An internal control unit malfunction is detected. Heater assembly (ECU)
098 A main relay malfunction is detected. Heater assembly (ECU)
099 An EEPROM error is detected. Heater assembly (ECU)

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HEATER ASSEMBLY


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

    2. Recheck for DTCs Click here.

      OK
      DTC is not output.

    NG

    REPLACE HEATER ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here