P0643

DTC P0643 SENSOR POWER SUPPLY

On Board Diagnosis Logic






FAIL-SAFE MODE






DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to "Diagnostic Procedure" below.

Wiring Diagram

EC-SEN/PW-01:

Diagnostic Procedure

Step 1-2:

Step 2 (Continued)-7:

Step 7 (Continued)-9: