B1213

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1213: Tilt and Telescopic ECU Communication Stop
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.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
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.

PROCEDURE

1. INSPECT FUSE (TI & TE, MPX-B)

(a) Remove the TI & TE fuse from the cowl side J/B RH.

(b) Remove the MPX-B fuse from the engine room R/B No. 1.

(c) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND)

(a) Disconnect the J28 ECU connector.





(b) Measure the resistance and voltage of the wire harness side connector.

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK RESISTANCE OF COMMUNICATION LINE

(a) Disconnect the J28, RA and RJ ECU connectors.





(b) Measure the resistance between the specified terminals on the wire harness side connectors.

Standard resistance:





Result:





B -- REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE TILT AND TELESCOPIC ECU

C -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE TILT AND TELESCOPIC ECU