DTC    B1205    AFS ECU Communication Stop

for Preparation Click here


DESCRIPTION

  1. This DTC is detected when communication between the AFS ECU and the multiplex network gateway ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1205
AFS ECU communication stops
  1. AFS ECU
  2. Wire harness

WIRING DIAGRAM


B110987E02


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 B1205, repair the "+B or GND short malfunction of communication bus" DTCs first.

1.INSPECT FUSE (GAUGE No.2)

  1. Remove the GAUGE No.2 fuse from the instrument panel junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


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


    B111035E03

  1. Disconnect the A17 ECU connector.

  1. Turn the ignition switch on.

  1. Measure the voltage and resistance of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A17-12 (IGS) - Body ground
    		Ignition switch ON
    		10 to 14 V
    A17-2 (IG) - Body ground
    		Ignition switch ON
    		10 to 14 V

    Standard resistance:
    Tester Connection
    		Specified Condition
    A17-1 (E1) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK RESISTANCE OF COMMUNICATION LINE

  1. Disconnect the P19 and T4 ECU connectors (w/ Driving position memory).



  1. Disconnect the P19 and G1 ECU connectors (w/o Driving position memory).


    B111047E02

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A17-5 (MPX1) - P19-7 (MPX1)
    		Below 1 Ω
    A17-5 (MPX1) (*1) - T4-5 (MPX1)
    		Below 1 Ω
    A17-5 (MPX1) (*2) - G1-12 (MPD2)
    		Below 1 Ω

    *1: w/ Driving position memory
    *2: w/o Driving position memory



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AFS ECU