PGM-FI System

DTC Troubleshooting (cont'd)

11-362  

DTC P0113: IAT Sensor Circuit High Voltage

  1. Turn the ignition switch ON (II).
  2. Check the IAT with the scan tool.

Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?

YES

- Go to step 3.

NO

- Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the IAT sensor and at the ECM/PCM.


  1. Turn the ignition switch OFF.
  2. Disconnect the IAT sensor 2P connector.
  3. Connect the IAT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.

IAT SENSOR 2P CONNECTOR

JUMPER WIRE

Wire side of female terminals

  1. Turn the ignition switch ON (II).

  1. Check the IAT with the scan tool.

Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?

YES

- Go to step 8.

NO

- Replace the IAT sensor.


  1. Turn the ignition switch OFF.
  2. Remove the jumper wire.
  3. Connect ECM/PCM connector terminals A10 and B17 with a jumper wire.

ECM/PCM CONNECTORS

JUMPER WIRE

Wire side of female terminals

  1. Turn the ignition switch ON (II).
  2. Check the IAT with the scan tool.

Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?

YES

- Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

NO

- Repair open in the wire between the ECM/PCM (A10, B17) and the IAT sensor.