Inspection Procedure

1. Using the DATA LIST of the intelligent tester, check for any momentary interruption in the wire harness corresponding to the DTC (see CHECK FOR INTERMITTENT PROBLEMS ).

   Skid control ECU 

   ITEM REFERENCE
   
   

   Item	Measurement Item / Range (Display)	Normal Condition
   EFI COM OPN	EFI communication open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal

   OK: There are no momentary interruptions. 

   HINT:

   Perform the above inspection before removing the sensor and connector.

NG: Go to step   3 

OK: GO TO NEXT STEP. 

1. Clear the DTC (engine control system).
2. Check the DTC (engine control system).

   Result 

   RESULT PROCEED
   
   

   Result	Proceed to
   DTC is output	A
   DTC is not output	B

B: REPLACE ECM 

A: REPAIR ENGINE CONTROL SYSTEM 

1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Perform a road test.
3. Check if the same DTC is recorded (see DTC CHECK / CLEAR ).

   Result 

   RESULT PROCEED
   
   

   Result	Proceed to
   DTC is not output	A
   DTC C1201/51 is output	B

B: Go to step   2 

A: END