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DLN-34 < DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX14B] P1808 VEHICLE SPEED SENSOR (ABS) P1808 VEHICLE SPEED SENSOR (ABS) Description INFOID:0000000006244938 The ABS actuator and electric unit (control unit) transmits a vehicle speed signal via CAN communication to the transfer control unit. DTC P1808 sets when a malfunction is detected in the vehicle speed signal that is output from the ABS actuator and electric unit (control unit) or an improper signal is input while driving. DTC Logic INFOID:0000000006244939 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Perform self-diagnosis. YES >> Perform diagnosis procedure. Refer to . NO >> Inspection End. Diagnosis Procedure INFOID:0000000006244940 1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to . Is any malfunction detected by self-diagnosis? YES >> Check the malfunctioning system. NO >> GO TO 2. 2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to Are the inspection results normal? YES >> GO TO 3. NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts. 3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. YES >> Inspection End. NO >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. DTC CONSULT-III Diagnostic item is detected when... Reference [P1808] VHCL SPEED SEN·ABS • Malfunction is detected in vehicle speed signal that is output from ABS • Improper signal is input while driving. Refer to . 2011 Pathfinder |