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C1900, C1901, C1906, C1907, C1927, C1933 4WAS MAIN CONTROL UNIT STC-87 < COMPONENT DIAGNOSIS > [WITH 4WAS] C D E F H I J K L M A B STC N O P C1900, C1901, C1906, C1907, C1927, C1933 4WAS MAIN CONTROL UNIT Description INFOID:0000000001666388 • 4WAS rear actuator and the power steering solenoid valve is controlled by each sensor signal. angle) when the electric components and the mechanical components are malfunctioning. • The protective function stops 4WAS system temporarily when the input signal is not inputted to 4WAS main control unit (When battery-power dose not work temporarily). • 4WAS front control unit and 4WAS main control unit perform two-way transmitting/receiving signals for opti- mal control of 4WAS system via 4WAS communication line. DTC Logic INFOID:0000000001666389 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. RECHECK DTC With CONSULT-III 1. Turn the ignition switch from OFF to ON. 2. Perform 4WAS main control unit self-diagnosis. Is DTC “C1900”, “C1901”, “C1906”, “C1907”, “C1927” or “C1933” detected? YES >> Proceed to diagnosis procedure. Refer to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000001666390 1. PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT) With CONSULT-III Perform 4WAS main control unit self-diagnosis. YES >> Replace 4WAS main control unit. Refer to NO >> GO TO 2. 2. CHECK INFORMATION With CONSULT-III Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to . Is each data the standard value? YES >> Check each harness connector pin terminal for disconnection. DTC Items (CONSULT-III screen terms) Diagnostic item is detected when... Possible cause C1900 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit C1901 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit C1906 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit C1907 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit C1927 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit C1933 CONTROL UNIT An error is detected inside 4WAS main control unit. 4WAS main control unit |