- Key
- Transponder key amplifier
- Wire harness
- Transponder key ECU assembly
| Last Modified: 4-30-2014 | 6.6 C | Doc ID: RM00000185J000X |
| Model Year: 2006 | Model: LX470 | Prod Date Range: [05/2005 - ] |
| Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2796,B2798; No Communication in Immobiliser System; 2006 MY LX470 [05/2005 - ] | ||
|
DTC |
B2796 |
No Communication in Immobiliser System |
|
DTC |
B2798 |
Communication Malfunction No. 2 |
DESCRIPTION
This DTC is stored in memory when a key that does not have a transponder chip is inserted or if communication between the key and transponder key ECU is impossible.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B2796 |
No communication |
|
|
B2798 |
Communication malfunction No. 2 |
Key |
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
DELETE DTC AND INSERT ALL PRESENTLY AVAILABLE KEYS TO CHECK WHETHER ENGINE STARTS OR NOT |
(a)
Delete the DTC
![2006 MY LX470 [05/2005 - ]; ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: DTC CHECK / CLEAR](../../../../stylegraphics/info.gif "2006 MY LX470 [05/2005 - ]; ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: DTC CHECK / CLEAR")
.
(b) Insert all the presently available keys to check whether the engine starts or not.
Result
|
Result |
Proceed to |
|---|---|
|
All keys do not start engine (B2796 is stored in memory) |
A |
|
All keys start engine |
B |
|
Specific key does not start engine (B2796 is stored in memory) |
C |
| B |
|
| C |
|
|
|
2. |
CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY AMPLIFIER) |
(a) Disconnect the T27 ECU connector.
(b) Disconnect the T11 amplifier connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
T27-8 (VC5) - T11-1 (VC5) |
Below 1 Ω |
|
T27-11 (CODE) - T11-4 (CODE) |
|
|
T27-12 (TXCT) - T11-5 (TXCT) |
|
|
T27-13 (AGND) - T11-7 (GND) |
|
|
T27-8 (VC5) or T11-1 (VC5) - Body ground |
10 kΩ or higher |
|
T27-11 (CODE) or T11-4 (CODE) - Body ground |
|
|
T27-12 (TXCT) or T11-5 (TXCT) - Body ground |
|
|
T27-13 (AGND) or T11-7 (GND) - Body ground |
| NG |
|
|
|
3. |
CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER |
(a) After replacing the transponder key amplifier with a normally functioning amplifier, check that the engine starts.
OK:
Engine starts.
| NG |
|
| OK |
|
|
|