Power Assisted Steering System: 6C-30
Step Action Yes No
1 1) Turn the ignition switch OFF.
2) Check the torque sensor coupler for loose or poor
contact. If OK, measure the torque sensor input voltage.
3) Disconnect the torque sensor coupler.
4) Turn the ignition switch ON.
5) Measure the input voltage between R wire “A” and
ground. If OK, then measure the voltage at the R wire
“A” and B wire “B”.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Tester knob indication
Voltage ( )
Torque sensor input voltage
5.0 V
Go to Step 2. • Loose or poor
contacts on the
torque sensor.
• Power supply circuit
(R wire) open.
• Power source or
power supply circuit
shorted to torque
sensor (main or sub)
circuit.
• Torque sensor (main
or sub) circuit open.
• If check result is not
satisfactory, replace
the EPS control unit
with a new one. Refer
to “EPS Control Unit
Removal and
Installation (LT-
A750XP/ZK9)
(Page 6C-48)”.
I931G3630026-01
“A”
“B”
(A)
I931G3630027-01
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