Toyota Venza manuals

Toyota Venza: No Communication in Immobiliser System (B2796,B2798)

DESCRIPTION

These DTCs are stored if a key that does not have a transponder chip is inserted into the ignition key cylinder or if communication between the key and the transponder key ECU assembly is impossible.

DTC No.

DTC Detection Condition

Trouble Area

B2796

The key code cannot be transmitted.

  • Key
  • Transponder key amplifier
  • Transponder key ECU assembly

B2798

Key code identification cannot be completed within the specified time (0.15 to 0.5 sec.).

  • Key
  • Transponder key amplifier
  • Transponder key ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • If the transponder key ECU assembly is replaced, register the key and ECU communication ID (See page ).
  • If the key is replaced, register the key (See page ).

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Immobiliser / Data List.

(e) Read the Data List according to the display on the Techstream.

Immobiliser (Transponder Key ECU Assembly)

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Immobiliser

Immobiliser system status/SET or UNSET

UNSET: Ignition switch ON

SET: Without key

-

OK:

On the Techstream screen, the item changes between UNSET and SET according to the chart above.


OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY


NG

2.

CHECK KEY

(a) Insert the vehicle's other key into the ignition key cylinder.

(b) Check that the engine starts with this key.

OK:

The engine starts.


NG

GO TO STEP 5


OK

3.

RE-REGISTER KEY

(a) Re-register the original key (See page
).


NEXT

4.

CHECK ENGINE START

(a) Check that the engine starts.

OK:

The engine starts.


OK

END (KEY WAS NOT REGISTERED CORRECTLY)


NG

REPLACE KEY

5.

REPLACE TRANSPONDER KEY AMPLIFIER

(a) Replace the transponder key amplifier (See page ).



NEXT

6.

CHECK ENGINE START

(a) Check that the engine starts.

OK:

The engine starts.


OK

END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE)


NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY

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