California Air Tools 3010 Service Manual Page 387

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STEERING 15-39
EPS (Electric Power Steering) System
TurnthemainswitchOFF.
Disconnect the EPS ECU and EPS motor connectors.
Check the wiring for continuity between main harness
connectors.
Special Tool - Hand Tester: 57001-1394
Wiring Continuity Inspection
EPS ECU Connector [A] ←→
EPS Motor Connector [B]
RLeadTerminal[C]
BK Lead Terminal [D]
If the wiring is good, check the power supply voltage (see
EPS ECU Power Supply Voltage Inspection).
If the power supply voltage is good, but the problem still
exists, replace the EPS ECU (see EPS ECU Removal/In-
stallation).
EPS Torque Sensor Inspection (Service Code 51)
TurnthemainswitchOFF.
Disconnect the EPS torque sensor connector [A].
Set the hand tester to the × 1 range and connect it to
the EPS torque sensor connector [A].
Special Tool - Hand Tester: 57001-1394
Measure the EPS torque sensor resistance.
EPS Torque Sensor Resistance Inspection
Connections:
(I) Y/BK Lead [B]
←→
BK/BL Lead [C]
(II) Y/R Lead [D]
←→
BK/BL Lead [C]
Standard:
Both Connections:
Any Reading Resistance
(reference 10 40 at 20°C
(68°F))
If the reading is infinity () , replace the EPS unit (see
EPS Unit Removal/Installation).
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