MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0821

DTC Code DTC Name
P0821 Gear Lever "X" Position Circuit

DESCRIPTION

Based on the signal from the transmission shift main switch, the transmission control ECU detects whether the shift lever position is in the E or M position. If the shift lever position switch is ON despite the shift lever position being N or R, the transmission control ECU sets the DTC.

For more details of the transmission shift main switch, refer to DTC P0820 Click here.

DTC No. DTC Detection Condition Trouble Area
P0821

The transmission control ECU detects the following conditions simultaneously for 1.0 second:

(1-trip detection logic)


  1. Shift lever position is in N or R.

  2. MDSW signal is ON.

  • Shift lock control unit assembly

    (Transmission shift main switch)

  • Wire harness connector

  • Transmission control ECU

WIRING DIAGRAM

A0136NFE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION SHIFT MAIN SWITCH)


    1. A0136CLE04
      Text In Illustration
      *a

      Component without harness connected

      Shift Lock Control Unit Assembly (Transmission Shift Main Switch)

      Disconnect the C40 shift lock control unit connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      4 (SFTD) - 8 (E)

      Shift lever in

      R, N or E

      		 10 kΩ or higher

      Shift lever in

      M, + or -

      		 Below 1 Ω

    NG

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - TRANSMISSION CONTROL ECU)


    1. Disconnect the A27 transmission control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A27-10 (MDSW) - C40-4 (SFTD) Always Below 1 Ω
      A27-10 (MDSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)


    1. A0137FIE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Shift Lock Control Unit Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C40-8 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TRANSMISSION CONTROL ECU


    1. Replace the transmission control ECU Click here.


    NEXT

  5. PERFORM INITIALIZATION


    1. Perform the initialization and learning for multi-mode manual transaxle system Click here.


    NEXT

    END