Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 206dv cib2799
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05-1856
DIAGNOSTICS - ENGINE IMMOBILIZER SYSTEM 052IM-23
DTC B2799 ENGINE IMMOBILISER SYSTEM
MALFUNCTION
CIRCUIT DESCRIPTION
This DTC is output when the ECM detects errors in communication between the transponder key ECU and
the ECM, or in the communication lines.
This DTC is also output when an engine start is attempted while the ECU communication ID between the
transponder key ECU and the ECM are different.
Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU.
If there is key code-related DTC detected in the transponder key ECU, repair it first.
DTC No. DTC Detection Condition Trouble Area
S Wire harness
S Error in communication between ECM and transponder
S Key
key ECU, and in communication line
B2799 S Transponder key ECU assy
S Communication ID is different during communication with
S Transponder key amplifier
transponder key ECU
S ECM
WIRING DIAGRAM
T6
Transponder Key ECU Assy
E5
ECM
J18
J/C
27 BR-R 25 35 BR-R 6
IMI EFIO
26 BR-W 23 33 BR-W 7
IMO EFII
B69244
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2039
05-1857
DIAGNOSTICS - ENGINE IMMOBILIZER SYSTEM
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - ECM)
(TRANSPONDER KEY ECU ASSY OR ECM - BODY GROUND)
(a) Disconnect the T6 ECU and E5 ECM connectors.
Wire Harness Side
(b) Check the resistance between the wire harness side con-
T6 nectors.
Transponder Key ECU Assy Standard:
Symbols (Terminal No.) Specified Condition
T6-6 (EFIO) - E5-27 (IMI) Below 1
T6-7 (EFII) - E5-26 (IMO) Below 1
(c) Check the resistance between the T6 or E5 wire harness
side connector and body ground.
Standard:
Terminal No. Specified Condition
E5
T6-6 (EFIO) or E5-27 (IMI) -
ECM 10 k or higher
Body ground
T6-7 (EFII) or E5-26 (IMO) -
10 k or higher
Body ground
NG REPAIR OR REPLACE HARNESS AND
Y B66220 B66229
CONNECTOR
OK
2 CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER
(a) After replacing the transponder key amplifier, check that the engine starts.
NG NORMAL
(TRANSPONDER KEY AMPLIFIER DEFECTIVE)
OK
REPLACE TRANSPONDER KEY ECU ASSY
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2040
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