Refer to DTC P1717.
Steering angle sensor is a hall plate between the photo-controller LED and the photo transistor.
As the hole plate rotates with steering wheel rotation, electrical signal will be generated depending on whether the LED light passes through the plate to the photo-transistor or not.
The signal is the steering wheel operation angular velocity and used to detect the steering wheel turning direction.
Steering angle center signal is for detecting if the steering wheel is at center or rotates.
The DTC will set when the steering angle sensor center signal to 4WD ECM is out of range.
Refer to DTC P1717.
Refer to DTC P1717.
Refer to DTC P1717.
Many malfunctions in the electrical system may be caused from poor harness and terminals. These faults can be caused by interference from other electrical systems and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Go to the next procedure.
Steering angle sensor center Signal Inspection
IG KEY ON, ENG ON
4WD ECM, Steering angle sensor connector : Connect.
Monitor signal waveform between terminal 1 of Steering angle sensor harness connector M14 and chassis ground.
Rotate the steering wheel both ways.
Specification : refer to 'Waveform Inspection'
Is Steering angle sensor center Signal display near the specified value?
▶ This may caused by intermittent fault. Verify data changibility by shaking the harness.
▶ Inspect power and power supply line of Steering angle sensor center circuit.
▶ Inspect ground and ground line of Steering angle sensor center circuit.
▶ Inspect ground to short of Steering angle sensor center circuit.
▶ Inspect open or short of Steering angle sensor center circuit.
▶ Check for Steering angle sensor module and replace it as necessary.
▶ Check for 4WD ECM and replace it as necessary.
Steering angle sensor center signal short to ground Inspection
IG KEY OFF, ENG OFF
4WD ECM connector and Steering angle sensor connector : Disconnect.
Measure resistance between terminal 1 of Steering angle sensor harness connector M14 and chassis ground.
Specification : Approx. ∞Ω
Is resistance display near the specified value?
▶ Proceed next inspection procedure.
▶ Repair ground to short circuit of Steering angle sensor center circuit.
▶ If problem is solved, go to the "Verification of Vehicle Repair"
Steering angle sensor center signal open Inspection
IG KEY OFF, ENG OFF
4WD ECM connector and Steering angle sensor connector : Disconnect.
Measure resistance between terminal 1 of Steering angle sensor harness connector M14 and terminal 11 of 4WD ECM harness connector.
Is resistance display near the specified value?
▶ Replace with normal Steering angle sensor module temporarily and check if vehicle run normally.
If trouble is disappeared, replace Steering angle sensor control module.
▶ Replace with normal 4WD ECM temporarily and check if vehicle run normally.
If trouble is disappeared, replace 4WD ECM.
▶ If problem is solved, go to the "Verification of Vehicle Repair".
▶ Repair open circuit of Steering angle sensor center circuit.
▶ If problem is solved, go to the "Verification of Vehicle Repair".
Refer to DTC P1717.
Refer to DTC P1717.
Refer to DTC P1717.
