Toyota Tundra (2015 year). Manual — part 2364
DTC B2784 is not output.
NG
GO TO STEP 3
OK
USE SIMULATION METHOD TO CHECK
3.
READ VALUE USING TECHSTREAM (ANTENNA COIL)
(a) Use the Data List to check if the transponder key coil is functioning properly.
Immobiliser
TESTER DISPLAY
MEASUREMENT ITEM/DISPLAY
NORMAL CONDITION
DIAGNOSTIC NOTE
Antenna Coil
Antenna coil condition / Normal or Fail
Normal: Antenna coil is normal
Fail: Antenna coil is malfunctioning
-
OK:
Normal (Antenna coil is normal) appears on the screen.
NG
GO TO STEP 4
OK
REPLACE TRANSPONDER KEY ECU
4.
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY
AMPLIFIER)
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; A...
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
J26-14 (VC5) - J20-1 (VC5)
Always
Below 1 Ω
J26-15 (CODE) - J20-4 (CODE)
J26-4 (TXCT) - J20-5 (TXCT)
J26-5 (AGND) - J20-7 (AGND)
J26-14 (VC5) or J20-1 (VC5) - Body
ground
Always
10 kΩ or higher
J26-15 (CODE) or J20-4 (CODE) -
Body ground
J26-4 (TXCT) or J20-5 (TXCT) -
Body ground
J26-5 (AGND) or J20-7 (AGND) -
Body ground
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.
CLEAR DTC
(a) Clear the DTC
.
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; A...
NEXT
7.
CHECK FOR DTC
(a) Check for DTC
.
OK:
DTC B2784 is not output.
NG
REPLACE TRANSPONDER KEY ECU
OK
END (TRANSPONDER KEY AMPLIFIER IS
DEFECTIVE)
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; A...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000001TCJ03YX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2793-B2795; Transponder Chip Malfunction;
2015 MY Tundra [08/2014 - ]
DTC
B2793
Transponder Chip Malfunction
DTC
B2794
Unmatched Encryption Code
DTC
B2795
Unmatched Key Code
DESCRIPTION
B2793 is output when a malfunction is found in the key during key code registration or a key code is not
registered normally. Replace the key if the key code registration cannot be performed normally and
this DTC is detected.
B2794 is output when a key with an incomplete key code is inserted into the ignition key cylinder.
B2795 is output when a key with a key code that has not been registered in the ECU is inserted into the
ignition key cylinder.
DTC CODE
DTC DETECTION CONDITION
TROUBLE AREA
B2793
Transponder chip malfunction
Key
B2794
Key with incomplete key code is inserted
B2795
Key with unregistered key code is inserted
INSPECTION PROCEDURE
PROCEDURE
1.
REREGISTER KEY
(a) Clear the DTCs
.
(b) Reregister the key code with the transponder key ECU
.
(c) Check that the engine starts with the key.
OK:
Engine starts.
NG
REPLACE KEY
OK
END
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2793-...
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