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Technical Service
Information Bulletin
March 12, 1999
Introduction
The Diagnostic Section (DI) of the Repair Manual has been expanded and clarified to
assist in troubleshooting the Engine Immobilizer System. Use this information in
accordance with the current Repair Manual for each model to diagnose the system.
Affected
1998 and 1999 All Models
Vehicles
Diagnostic
DTC
Procedure
CIRCUIT DESCRIPTION
This DTC is stored in memory when a key that does not have a Transponder Chip is
inserted into the ignition or if there is loss of communication between the key and ECM.
DTC No.
B2796
Warranty
OP CODE
Information
N/A
Lexus Supports ASE Certification
Title:
TROUBLESHOOTING IMMOBILIZER
DTC B2796
Models:
'98 & '99 All Models
B2796
No Communication In
Immobilizer System
Condition
No Communication
DESCRIPTION
Not Applicable to Warranty
Probable Cause
Key
Transponder key coil
Transponder key amplifier
Wire harness
ECM
TIME
–
OPN
T1
T2
–
–
–
Page 1 of 3
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Summary of Contents for Lexus DTC B2796
- Page 1 ECM. DTC No. Condition Probable Cause Transponder key coil B2796 No Communication Transponder key amplifier Wire harness Warranty OP CODE DESCRIPTION TIME Information Not Applicable to Warranty – – – – Page 1 of 3 Lexus Supports ASE Certification...
- Page 2 TROUBLESHOOTING IMMOBLIZER DTC B2796 – EL003-99 March 12, 1999 Diagnostic Delete the DTC and insert all presently available keys to check Procedure whether the engine starts or not. RESULT: All keys start the engine. A specific key does not start the engine.
- Page 3 TROUBLESHOOTING IMMOBLIZER DTC B2796 – EL003-99 March 12, 1999 Check the harness and connector between the Transponder Key Amplifier and ECM. Repair or replace the damaged harness and/or connector. Exchange the Transponder Key Amplifier with a known good one. Does the system operate normally? Replace the Transponder Key Amplifier.
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