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 TCM detects whether the shift lever is in E or M. If the shift lever position switch is ON despite the shift lever being in N or R, the TCM stores this DTC.

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

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Memory

P0821

Gear Lever "X" Position Circuit

The TCM detects the following conditions simultaneously for 1.0 second:

(1-trip detection logic)

  1. Shift lever is in N or R.

  2. MSDW signal is ON.

  • Shift lock control unit assembly

    (Transmission shift main switch)

  • Short in MDSW signal circuit

  • TCM

Does not come on

Comes on

DTC stored

WIRING DIAGRAM

C279534E01

PROCEDURE

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

    1. C234422C01

      *a

      Component without harness connected

      Shift Lock Control Unit Assembly

      (Transmission Shift Main Switch)

      Disconnect the shift lock control unit connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      4 (MDSW) - 8 (GND)

      Shift lever in R, N or E

      10 kΩ or higher

      Shift lever in M, "+" or "-"

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

    Click here

    OK

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

    1. Disconnect the TCM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E104-10 (MDSW) - E103-4 (MDSW)

      Always

      Below 1 Ω

      E104-10 (MDSW) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E103-8 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TCM

    1. Replace the TCM.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  5. PERFORM INITIALIZATION

    1. Perform the initialization and learning procedure.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

    END