Inspection Procedure

HINT:

• If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
• Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

1. CHECK POWER STEERING OIL PRESSURE SENSOR 
   1. Connect a hand-held tester or OBD II scan tool to the DLC3.
   2. Turn the tester or scan tool ON.
   3. Start the engine.
   4. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / PS SIGNAL.
   5. Read the value displayed on the tester.
   6. If using an OBD II scan tool, refer to the instruction manual.

      OK: 

      POWER STEERING OIL PRESSURE SENSOR CONDITIONS
      
      

      Conditions	Power steering oil pressure sensor
      Steering wheel lock	ON
      In an idle	OFF

   1. OK : (See  CHECK FOR INTERMITTENT PROBLEMS   ) 
   2. NG : GO TO NEXT STEP 
2. CHECK HARNESS AND CONNECTOR (ECM - POWER STEERING OIL PRESSURE SENSOR) 
   1. Disconnect the E3 and E4 ECM connectors.
   2. Disconnect the P2 power steering oil pressure sensor connector.
   3. Check the resistance.
      Fig 1: Disconnecting E3 & E4 ECM Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      RESISTANCE SPECIFICATIONS FOR OPEN
      
      

      Tester Connections	Specified Conditions
      VOUT (P2-2) - PSP (E4-29)	Below 1 Ω
      VC (P2-3) - VCC (E3-18)
      GND (P2-1) - E2 (E3-28)

      Standard (Check for short): 

      RESISTANCE SPECIFICATIONS FOR SHORT
      
      

      Tester Connections	Specified Conditions
      VOUT (P2-2) or PSP (E4-29) - Body ground	10 kΩ or higher
      GND (P2-1) or E2 (E3-28) - Body ground

   4. Reconnect the power steering oil pressure sensor connector.
   5. Reconnect the ECM connector.
      Fig 2: Disconnecting P2 Power Steering Oil Pressure Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK : REPLACE POWER STEERING OIL PRESSURE SENSOR