DTC C155A-16: Power Steering Motor "A" Supply Voltage Circuit Voltage Below Threshold; DTC C155A-17: Power Steering Motor "A" Supply Voltage Circuit Voltage Above Threshold; DTC C155B-16: Power Steering Motor "B" Supply Voltage Circuit Voltage Below Threshold; DTC C155B-17: Power Steering Motor "B" Supply Voltage Circuit Voltage Above Threshold [11/2023 - ]: Procedure

1. Disconnect the C67 rack and pinion power steering gear assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to Rack and Pinion Power Steering Gear Assembly)

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2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   C67-8 (PIG) - Body ground	Always	11 to 14 V

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C67-7 (PGND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR