DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (TI & TE, MPX-B)
CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND)
CHECK RESISTANCE OF COMMUNICATION LINE
DTC B1213 Tilt and Telescopic ECU Communication Stop
DESCRIPTION
This DTC is detected when communication between the tilt and telescopic ECU and the gateway ECU stops for more than 10 seconds.
| DTC No. | DTC Detection Condition | Trouble Area |
| B1213 | Tilt and telescopic ECU communication stops | Tilt and telescopic ECU
Wire harness
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1213, repair the "+B or GND short malfunction of communication bus" DTCs first.
| 1.INSPECT FUSE (TI & TE, MPX-B) |
Remove the TI & TE fuse from the main body ECU RH (cowl side J/B RH).
Remove the MPX-B fuse from the engine room J/B No. 1.
Measure the resistance of the fuses.
- Standard resistance:
- Below 1 Ω
| 2.CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND) |
Disconnect the J28 ECU connector.
Measure the resistance and voltage of the wire harness side connector.
- Standard voltage:
| Tester Connection | Condition | Specified Condition |
| +B (J28-2) - Body ground | Always | 10 to 14 V |
| ECUB (J28-9) - Body ground | Always | 10 to 14 V |
- Standard resistance:
| Tester Connection | Specified Condition |
| GND (J28-11) - Body ground | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK RESISTANCE OF COMMUNICATION LINE |
Disconnect the J28 and RA ECU connectors.
Measure the resistance between the specified terminals on the wire harness side connectors.
- Standard resistance:
| Tester Connection | Specified Condition |
| MPX1 (J28-5) - RA-20 | Below 1 Ω |
| MPX1 (J28-5) - Body ground | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE TILT AND TELESCOPIC ECU |
|
LEXUS IS250, IS220d / GSE20 ALE20
