B1205 AFS ECU communication stops

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	AFS ECU Wire harness

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 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.

2. 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)

1. Disconnect the A17 ECU connector.

2. Turn the ignition switch on.

3. 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).

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

3. 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