Diagnosis Circuit

DIAGNOSIS CIRCUIT

CIRCUIT DESCRIPTION
This circuit is used to read the DTCs that are output from the transponder key ECU assembly with the hand-held tester.

HINT: There are 2 DTCs that are output from the ECM:
- DTC B2799 can be read with the hand-held tester and DTC 99 can be read with the check wire.
- These DTCs are output to the same circuit as "SFI system" and "cruise control system".
- When each warning light keeps blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

Wiring Diagram:

Step 1-2:

INSPECTION PROCEDURE