C1274

DTC C1274/74 Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)

DESCRIPTION

DTC Detecting Conditions:

The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change as the rotors turn. The speed sensors detect those magnetic changes and send pulse signals to the skid control ECU.

The ECU monitors the wheel speeds through these pulse signals to control the ABS control system.

HINT:
- DTC C0210/33 and C1238/38 relate to the skid control sensor RH.
- DTC C0215/34 and C1239/39 relate to the skid control sensor LH.

Wiring Diagram:

Step 1(Continued)-3:

Step 4-5:

Step 6-7:

Step 7(Continued)-11:

Step 11(Continued):

INSPECTION PROCEDURE

NOTE: Check the speed sensor signal in test mode after cleaning or replacement.