Toyota Tundra (2015 year). Manual — part 2365
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2793-...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000001TCG03GX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2796,B2798; No Communication in Immobiliser
System; 2015 MY Tundra [08/2014 - ]
DTC
B2796
No Communication in Immobiliser System
DTC
B2798
Communication Malfunction No. 2
DESCRIPTION
DTC B2796 is output when a key is inserted into the ignition key cylinder but no communication occurs
between the key and transponder key ECU.
DTC B2798 is output when a key is inserted into the ignition key cylinder but a communication error
occurs between the key and transponder key ECU.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
B2796
The key code cannot be transmitted
Key
Harness or connector
Transponder key ECU
Transponder key
amplifier
B2798
Key code identification cannot be completed within the specified
time
Key
WIRING DIAGRAM
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2796,B...
NEXT
INSPECTION PROCEDURE
HINT:
When the transponder key ECU is replaced, reregister the ECU - ECM communication ID
.
PROCEDURE
1.
CLEAR DTC
(a) Clear the DTC
.
2.
CHECK FOR DTC
(a) Check for DTC
.
OK:
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2796,B...
DTC B2796 or B2798 is not output.
NG
GO TO STEP 3
OK
USE SIMULATION METHOD TO CHECK
3.
READ VALUE USING TECHSTREAM (ENGINE IMMOBILISER SYSTEM)
(a) Use the Data List to check if the engine immobiliser system is functioning properly.
Immobiliser
TESTER
DISPLAY
MEASUREMENT ITEM / DISPLAY
NORMAL CONDITION
DIAGNOSTIC
NOTE
Immobiliser
Immobiliser system status / Set or
Unset
Set: No key is in ignition key
cylinder
Unset: Key is in ignition key
cylinder
-
OK:
Unset (key is in ignition key cylinder) appears on the screen.
NG
GO TO STEP 4
OK
REPLACE TRANSPONDER KEY ECU
4.
CHECK WHETHER ENGINE STARTS WITH OTHER KEYS
(a) Check if the engine starts with an already registered vehicle key.
OK:
Engine starts.
NG
GO TO STEP 5
OK
REREGISTER KEY CODE OR REPLACE KEY THAT
CANNOT START ENGINE
5.
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY
AMPLIFIER)
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2796,B...
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