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DTC Diagnosis Procedure
1.CHECK EXHAUST GAS TEMPERATURE SENSOR
With M.U.T.-III SE
  1. Turn ignition switch ON.
  2. Select “EXHAUST GAS TEMP SEN 1 B1” in “DATA MONITOR” mode of “ENGINE” using M.U.T.-III SE.
  3. Start engine and warm it up to normal operating temperature.
  4. Check that “EXHAUST GAS TEMP SEN 1 B1” indication as follows.
    Monitor itemConditionValue
    EXHAUST GAS TEMP SEN 1 B1
    • Warm-up condition
    • Idle speed
    		1,290 – 2,940 mV
 
Without M.U.T.-III SE
  1. Start engine and warm it up to normal operating temperature.
  2. Check that voltage between ECM harness connector terminals as follows.
    ECMConditionVoltage
    Connector+−
    Terminal
    B-111234
    • Warm-up condition
    • Idle speed
    		1.29 – 2.94 V
 
Is the inspection result normal?
.
Replace exhaust gas temperature sensor. Refer to Exploded View.
 
2.CHECK EXHAUST GAS TEMPERATURE SENSOR POWER SUPPLY
  1. Turn ignition switch OFF.
  2. Disconnect exhaust gas temperature sensor harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between exhaust gas temperature sensor harness connector terminal and ground.
    +−Voltage
    (Approx.)
    Exhaust gas temperature sensor
    ConnectorTerminal
    B-461Ground5 V
Is the inspection result normal?
.
.
 
3.CHECK EXHAUST GAS TEMPERATURE SENSOR GROUND CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between exhaust gas temperature sensor harness connector and ECM harness connector.
    +−Continuity
    Exhaust gas temperature sensorECM
    ConnectorTerminalConnectorTerminal
    B-462B-1134Existed
  4. Also check harness for short to power.
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent Incident.
Repair or replace error-detected parts.
 
4.CHECK EXHAUST GAS TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between exhaust gas temperature sensor harness connector and ECM harness connector.
    +−Continuity
    Exhaust gas temperature sensorECM
    ConnectorTerminalConnectorTerminal
    B-461B-1112Existed
  4. Also check harness for short to ground and short to power.
Is the inspection result normal?
Perform the trouble diagnosis for ECM power supply circuit. Refer to DTC Diagnosis Procedure.
Repair or replace error-detected parts.