DTC Troubleshooting: B1226 (B)
DTC B1226 or DTC indicator B:
 A Short in the In-car Temperature Sensor Circuit
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch OFF and then ON (II).
  1. Do the self-diagnostic with the HDS or climate control unit.
  1. Check for DTCs.
Is DTC B1226 or B indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure.■
  1. Turn the ignition switch OFF.
  1. Remove the in-car temperature sensor and test it.
Is the in-car temperature sensor OK?
YES -
Go to Step 7 .
NO -
Replace the in-car temperature sensor .■
  1. Disconnect the climate control unit 32P connector.
  1. Check for continuity between body ground and the climate control unit 32P connector terminal No. 14.
Is there continuity?
YES -
Repair short to body ground in the wire between the climate control unit and the in-car temperature sensor.■
NO -
Go to Step 9 .