DESCRIPTION
The power steering ECU assembly supplies a voltage of 5 V to the torque sensor (electric power steering column sub-assembly) and monitors the voltage value of the Hall IC inside the torque sensor (electric power steering column sub-assembly) which changes in response to changes in the magnetic flux density (steering torque) detected by the Hall IC, and calculates the assist torque.
While DTC C151B17 is detected, power assist is stopped or assist amount is limited due to fail-safe operation.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
---|---|---|---|---|---|---|
C151B17 | Power Steering Torque Sensor "B" Supply Voltage Circuit Voltage Above Threshold | TRQV2 voltage is 5.6 V or more |
| EPS warning light: Comes on | Ignition switch ON again | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. | INSPECT TORQUE SENSOR (ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY) (CHECK FOR SHORT) |
(a) Disconnect the z7 power steering ECU assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
z7-3 (TRQV2) - Body ground | Always | 10 kΩ or higher |
z7-3 (TRQV2) - z7-2 (TRQG2) | Always | 10 kΩ or higher |
NG | REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY |
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2. | INSPECT POWER STEERING ECU ASSEMBLY (POWER SOURCE OF TORQUE SENSOR) |
(a) Start the engine.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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OK | REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY |
NG | REPLACE POWER STEERING ECU ASSEMBLY |
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open