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STC-26 < DTC/CIRCUIT DIAGNOSIS > C1609 VEHICLE SPEED SIGNAL C1609 VEHICLE SPEED SIGNAL DTC Logic INFOID:0000000011279658 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test. >> GO TO 2. 2. DTC REPRODUCTION PROCEDURE With CONSULT 1. Turn the ignition switch OFF to ON. 2. Perform “Self Diagnostic Result” for “EPS”. YES >> Proceed to diagnosis procedure. Refer to NO >> Inspection End. Diagnosis Procedure INFOID:0000000011279659 1. PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS With CONSULT 1. Turn the ignition switch OFF to ON. 2. Perform “Self Diagnostic Result” for “ABS”. YES >> Check the DTC. Refer to . NO >> GO TO 2. 2. CHECK TERMINALS AND HARNESS CONNECTORS Check EPS control unit pin terminals for damage or loose connection with harness connector. YES >> GO TO 3. NO >> Repair or replace malfunctioning parts. 3. PERFORM SELF-DIAGNOSIS With CONSULT Perform “Self Diagnostic Result” for “EPS”. YES >> EPS control unit is malfunctioning. Replace steering column assembly. Refer to . NO >> Check intermittent incident. Refer to GI-44, "Intermittent Incident" . DTC Display item Malfunction detected condition Possible cause C1609 CAN VHCL SPEED • Malfunction is detected in vehicle speed signal that is output from ABS actuator and electric unit (con- • ABS actuator and electric unit (control unit) input signal error is detected. • Harness or connector (CAN communication line) • EPS control unit |