Toyota Tundra (2015 year). Manual — part 2367
OK
(a) Using an oscilloscope, check for noise in the waveform
TESTER
CONNECTION
TOOL
SETTING
CONDITION
SPECIFIED
CONDITION
J26-15 (CODE) -
J20-4 (CODE)
5 V/DIV., 20
msec./DIV.
Key inserted in
ignition key
cylinder
No noise is
present
NG
FIND CAUSE OF NOISE AND REMOVE IT
4.
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY
AMPLIFIER)
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2797; ...
OK
NEXT
(a) Disconnect the J26 ECU connector.
(b) Disconnect the J20 amplifier connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
J26-15 (CODE) - J20-4 (CODE)
Always
Below 1 Ω
J26-15 (CODE) or J20-4 (CODE) -
Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
5.
REPLACE TRANSPONDER KEY AMPLIFIER
(a) Temporarily replace the transponder key amplifier with a new or normally functioning one
.
6.
CHECK WHETHER ENGINE STARTS
(a) Check that the engine starts normally.
OK:
Engine starts.
NG
REPLACE TRANSPONDER KEY ECU
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2797; ...
OK
END (TRANSPONDER KEY AMPLIFIER IS
DEFECTIVE)
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2797; ...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000001TCL046X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2799; Engine Immobiliser System Malfunction;
2015 MY Tundra [08/2014 - ]
DTC
B2799
Engine Immobiliser System Malfunction
DESCRIPTION
communication ID between the transponder key ECU and ECM is different and an engine start is attempted.
Before troubleshooting for this DTC, make sure no engine immobiliser DTCs are present. If present, troubleshoot
the engine immobiliser DTCs first.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
B2799
ECU
Error in communication lines
ECU - ECM communication ID is different during
communication with transponder key ECU
Harness or
connector
Transponder key
ECU
ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
When the transponder key ECU and/or ECM is replaced, reregister the ECU - ECM communication ID
.
PROCEDURE
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2799; E...
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