DTC C0500-1F: Left Front Wheel Speed Sensor Circuit Intermittent; DTC C0506-1F: Right Front Wheel Speed Sensor Circuit Intermittent [08/2019 - ]: Description

The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used for brake control.

Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C0500-1F	Left Front Wheel Speed Sensor Circuit Intermittent	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less, an open in the sensor signal circuit of a malfunctioning area occurs 255 times or more. When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Front speed sensor LH Front speed sensor rotor LH (Front axle with ABS rotor bearing assembly LH) Sensor installation
C0506-1F	Right Front Wheel Speed Sensor Circuit Intermittent	Any of the following is detected: When the +BS terminal voltage is 17.4 V or less, an open in the sensor signal circuit of a malfunctioning area occurs 255 times or more. When the +BS terminal voltage is 17.4 V or less, an a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. When the +BS terminal voltage is 17.4 V or less at a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Front speed sensor RH Front speed sensor rotor RH (Front axle with ABS rotor bearing assembly RH) Sensor installation

Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU (brake actuator assembly).

C0500-1F DTC DETECTION CONDITIONS

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	When the +BS terminal voltage is 17.4 V or less	◦	◦	◦
Malfunction Status	An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more	◦	-	-
	At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds	-	◦	-
	At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation	-	-	◦
Detection Time		-	-	15 seconds or more.
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

C0506-1F DTC DETECTION CONDITIONS

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	When the +BS terminal voltage is 17.4 V or less	◦	◦	◦
Malfunction Status	An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more	◦	-	-
	At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds	-	◦	-
	At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation	-	-	◦
Detection Time		-	-	15 seconds or more.
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.