B1277

MULTIPLEX COMMUNICATION SYSTEM: B1277: Center Cluster Integration Panel ECU Communication Stop

DTC B1277 - Center Cluster Integration Panel ECU Communication Stop

DESCRIPTION
- This DTC is detected when communication between the center cluster integration panel and multiplex network gateway ECU stops for more than 10 seconds.

WIRING DIAGRAM

INSPECTION PROCEDURE
HINT: When "+B or GND short malfunction of communication bus" DTCs (B1266 andB1267) are detected at the same time as "communication stop" DTC B1277, repair the "+B or GND short malfunction of communication bus" DTCs first.

PROCEDURE

1. INSPECT FUSE (GAUGE NO. 1)
(a) Remove the GAUGE No. 1 fuse from the instrument panel junction block.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CENTER CLUSTER INTEGRATION PANEL - BATTERY AND BODY GROUND)

(a) Disconnect the C4 panel connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE
(a) Disconnect the C8 and G3 ECU connectors.

(b) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE CENTER CLUSTER INTEGRATION PANEL