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AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2810

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DTC Code DTC Name
P2810 Pressure Control Solenoid "G" Electrical
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DESCRIPTION

Based on the ON-OFF combinations of the shift solenoid valve SL1, SL2, SL3, SL4 and SL5, the TCM performs gear shifts from 1st gear to 8th gear.

If a circuit related to a solenoid valve is open or shorted, the TCM uses the fail-safe function to turn other solenoid valves ON or OFF. If all solenoid valves are malfunctioning, only the mechanical fluid pressure circuit will function and some manual operation will be possible. If an open or short has occurred, the TCM cuts power to the malfunctioning solenoid valve.

Tip:

The following table shows normal operation of the shift solenoid valve SL4 when the shift lever is in D.

Table 1. Shift Solenoid Valve Operation:
Gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Shift Solenoid Valve SL4 OFF OFF OFF ON OFF ON OFF OFF
DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P2810

  1. Driving so that gear changes occur

  2. Shift solenoid valve SL4 circuit is open or shorted

  3. 2 seconds

  4. 1-trip detection logic

  • Shift solenoid valve SL4

  • Transmission wire

  • Harness or connector

  • TCM
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MONITOR DESCRIPTION

This DTC indicates an open or short in the shift solenoid valve SL4 circuit. The TCM commands gear shifts by turning the shift solenoid valves on or off. When there is an open or short circuit in any shift solenoid valve circuit, the TCM detects the problem, illuminates the MIL and stores a DTC. The TCM performs the fail-safe function and turns the other normal shift solenoid valves on or off. In case of an open or short circuit, the TCM stops sending current to the open or short circuited solenoid.

Table 2. *a Shift Solenoid Valve SL4 *b Transmission Wire
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

Perform registration and/or initialization when parts related to the automatic transmission are replaced (Click here).

Tip:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the D Position Shift Test in Road Test (Click here).

  2. Check for DTCs again (Click here).

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (SHIFT SOLENOID VALVE SL4 - TCM)


    1. B001XRQE02

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A81-14 (SL4+) - A81-5 (SL4-) 20°C (68°F) 5.0 to 5.6 Ω
      A81-14 (SL4+) or A81-5 (SL4-) - Body ground Always 10 kΩ or higher
      Table 3. Text in Illustration
      *a

      Rear view of wire harness connector

      (to TCM)

  2. Click here

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the C171 transmission wire connector.

    2. Disconnect the A81 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C171-13 (SL4+) - A81-14 (SL4+) Always Below 1 Ω
      C171-14 (SL4-) - A81-5 (SL4-) Always Below 1 Ω
      C171-13 (SL4+) or A81-14 (SL4+) - Body ground Always 10 kΩ or higher
      C171-14 (SL4-) or A81-5 (SL4-) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    INSPECT SHIFT SOLENOID VALVE SL4


    1. B00201YE13

      Remove the shift solenoid valve SL4 (Click here).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal 1 of the shift solenoid valve SL4 - Terminal 2 20°C (68°F) 5.0 to 5.6 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK
      Measurement Condition Specified Condition

      • Battery positive (+) with a 21 W bulb → Terminal 2

      • Battery negative (-) → Terminal 1

      		 Valve moves and makes an operating noise
      Table 4. Text in Illustration
      *1 Shift Solenoid Valves SL4

    • OK

      REPAIR OR REPLACE TRANSMISSION WIRE (Click here)

    • NG

      REPLACE SHIFT SOLENOID VALVE SL4 (Click here)