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DTC Diagnosis Procedure
1.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY
  1. Turn ignition switch OFF.
  2. Disconnect A/F sensor 1 harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between A/F sensor 1 harness connector and ground.
    +−Voltage
    A/F sensor 1
    ConnectorTerminal
    F184GroundBattery voltage
Is the inspection result normal?
.
.
 
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect IPDM E/R harness connector.
  3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.
    +−Continuity
    A/F sensor 1IPDM E/R
    ConnectorTerminalConnectorTerminal
    F184F3575Existed
  4. Also check harness for short to ground.
Is the inspection result normal?
Perform the trouble diagnosis for power supply circuit.
Repair or replace error-detected parts.
 
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
    +−Continuity
    A/F sensor 1ECM
    ConnectorTerminalConnectorTerminal
    F181F5156Existed
    260
  4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.
    +−Continuity
    A/F sensor 1
    ConnectorTerminal
    F181GroundNot existed
    2
    +−Continuity
    ECM
    ConnectorTerminal
    F5156GroundNot existed
    60
  5. Also check harness for short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
4.CHECK INTERMITTENT INCIDENT
Perform Intermittent Incident. Refer to Intermittent IncidentIntermittent Incident.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
5.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to Exploded View.
: INSPECTION END