DTC C1203/95: ECM Communication Circuit Malfunction [10/2015 - ]: Procedure

1. Check that the proper hybrid vehicle control ECU assembly, main body ECU (multiplex network body ECU) and yaw rate and acceleration sensor (airbag ECU assembly) are installed.

   OK

   Proper ECUs and sensor are installed.

2. Check if the hybrid vehicle control ECU assembly, main body ECU (multiplex network body ECU) and yaw rate and acceleration sensor (airbag ECU assembly) were replaced before the DTC was recorded.

   OK

   ECU or sensor was not replaced.

   Result

   Result	Proceed to
   OK	A
   NG (A proper hybrid vehicle control ECU assembly is not installed and/or the hybrid vehicle control ECU assembly was replaced.)	B
   NG (A proper main body ECU (multiplex network body ECU) is not installed and/or the main body ECU (multiplex network body ECU) was replaced.)	C
   NG (A proper yaw rate and acceleration sensor (airbag ECU assembly) is not installed and/or the yaw rate and acceleration sensor (airbag ECU assembly) was replaced.)	D

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

(Refer to REMOVAL [10/2015 - ] )

Result: 

C 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [10/2015 - ] )

Result: 

D 

REPLACE AIRBAG ECU ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

A 

See step  2

1. Perform initialization and calibration of the linear solenoid valve (Refer to INITIALIZATION [10/2014 - ] ).

   HINT: 

   Before performing initialization and calibration of the linear solenoid valve, C1203/95 will be output.

Result: 

NEXT 

See step  3

1. Turn the power switch off.
2. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
3. Turn the power switch on (IG).
4. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   Result

   Result	Proceed to
   DTC C1203/95 is output.	A
   DTC C1203/95 is not output.	B

Result: 

A 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

B 

END