Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

DELETE DTC AND INSERT ALL PRESENTLY AVAILABLE KEYS TO CHECK WHETHER ENGINE STARTS OR NOT

Delete DTC (see DTC CHECK/CLEAR ).

Insert all the presently available keys to check whether the engine starts or not.

Result:

ALL PRESENTLY AVAILABLE KEYS

Result	Proceed to
All keys do not start engine (B2796 is output)	A
All keys start engine (B2796 is not output)	B
Specific key does not start engine (B2796 is output)	C

B: NO PROBLEM
C: REPLACE SPECIFIC KEY
A: GO TO NEXT STEP

CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY AMPLIFIER)

Disconnect the T19 ECU connector.
Disconnect the T10 amplifier connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY AMPLIFIER

Tester Connection	Specified Condition
T19-8 (VC5) - T10-1 (VC5)	Below 1 Ω
T19-11 (CODE) - T10-4 (CODE)
T19-12 (TXCT) - T10-5 (TXCT)
T19-13 (AGND) - T10-7 (GND)
T19-8 (VC5) or T10-1 (VC5) - Body ground	10 kΩ or higher
T19-11 (CODE) or T10-4 (CODE) - Body ground
T19-12 (TXCT) or T10-5 (TXCT) - Body ground
T19-13 (AGND) or T10-7 (GND) - Body ground

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP

CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER
1. After replacing the transponder key amplifier with a normally functioning transponder key amplifier, check that the engine starts.
  OK: Engine starts.
- NG: REPLACE TRANSPONDER KEY ECU ASSEMBLY
- OK: END (TRANSPONDER KEY AMPLIFIER IS DEFECTIVE)