Diagnosis Circuit (from 12/2010)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: Diagnosis Circuit
- Diagnosis Circuit

DESCRIPTION

This circuit is used to read the DTCs that are output from the transponder key ECU assembly with Techstream.

HINT
There are 2 DTCs that are output from the ECM:

* DTC B2799 can be read with Techstream 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" (For detailed inspection procedure) How to Proceed with Troubleshooting (from 12/2010).
* 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





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - DLC3)

(a) Disconnect the D33 ECU connector.





(b) Measure the resistance according to the value(s) in the table below.

Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

(a) Measure the resistance according to the value(s) in the table below.





Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE