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Toyota Camry DTC P1705

Q. Good morning Mr. Ciulla, I have a:

  • 1996 Toyota Camry
  • 3.0 liter V-6
  • Automatic transmission
  • 197,000 miles
  • Fuel injection
  • ABS brakes
  • P/S, A/C, cruise control
Toyota Camry DTC P1705

In the last two years the Check Engine Light has come on. Investigation by my mechanic turned up a P1705 code. A friend did some research at the library and discovered that there were two sensors associated with this code. However, using a magnetic, he discovered that the sensors were within specs.

My mechanic was reassured that the sensors were okay and felt at that time that replacing them to the tune of about $1,000.00 probably would not result in the Check Engine Light being turned off permanently.

Since California requires biennial smog checks, this meant that my mechanic had to reset the computer to turn off the Check Engine Light. Two years ago, this resulted in the car passing the OBDC-II smog test allowing me to register the car.

However, it is now time for another smog test and the same code is occurring, but this time my mechanic took the car to a transmission shop which stated that there is a bad sensor inside of the transmission. Therefore, it was suggested that I replace the transmission at the tune of over $1,200.00, again with no guarantee that this would result in that darned Check Engine Light going off.

It seems odd to me that the same code could result in two different diagnosis over a two year period. Can you explain this to me?

Thank you for your time!
Scharleen

A. First, the code. DTC P1705 Direct Clutch Speed Sensor Circuit Malfunction. This DTC applies only to the Direct Clutch Speed Sensor. I don't know what other sensor your friend is referring to.

CIRCUIT DESCRIPTION:
This sensor detects the rotation speed of the direct clutch drum. By comparing the direct clutch speed signal and the vehicle speed sensor signal, the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure in response to various conditions, thus performing smooth gear shifting.

Toyota Camry DTC P1705

DETECTING CONDITION:

Toyota Camry DTC P1705

WIRING DIAGRAM:

Toyota Camry DTC P1705

INSPECTION PROCEDURE:

Toyota Camry DTC P1705

Toyota Camry DTC P1705

DIRECT CLUTCH SPEED SENSOR REPLACEMENT:

Toyota Camry DTC P1705

  1. Disconnect direct clutch speed sensor connector
  2. Remove direct clutch speed sensor
    • Remove the bolt and direct clutch speed sensor.
    • Remove the O-ring from direct clutch speed sensor.
  3. Install direct clutch speed sensor
    • Coat a new O-ring with ATF and install it to the direct clutch speed sensor.
    • Install the direct clutch speed sensor and torque the bolt.

This repair does not require a new transmission nor does it even require removing the transmission.

If your mechanic will follow the steps as shown, he can, very quickly, determine if it is a bad direct clutch speed sensor, wiring or PCM.

Additional Information provided courtesy of AllDATA

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