MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0820

DTC Code DTC Name
P0820 Gear Lever "X-Y" Position Sensor Circuit

DESCRIPTION

The TCM detects the shift lever position using the shift lever position sensor. The shift lever position sensor has two functions; detection and monitoring.

The shift lever position sensor consists of the Link 1 circuit that detects the shift lever positions, R, N, E and M, and the Link 2 circuit that detects the "+" and "-" positions. The circuits are connected to the shift lever via the respective links. The contact switches (6-contact switch for Link 1, and 2-contact switch for Link 2) of the circuits turn on and off in accordance with the fore-aft movement of the shift lever. The TCM detects the current shift lever position in accordance with the ON/OFF status of these contact switches. The transmission shift main switch detects the side-to-side movement of the shift lever. It turns off when the shift lever is in R, N, or E , and turns on when in M, "+", or "-" .

The shift lever position sensor and the transmission shift main switch convert the shift lever position into electric signals and output them to the TCM. The TCM detects the current shift lever position from these signals and operates the actuators to change the gear position.

Contact Point

Shift Lever Position

R

N

E

M

-

+

Link 1

LSRC

OFF

ON

ON

ON

ON

ON

LSWR

ON

OFF

OFF

OFF

OFF

OFF

LSSC

ON

ON

OFF

OFF

OFF

OFF

LSWS

OFF

OFF

ON

ON

ON

ON

LSNC

ON

OFF

ON

ON

ON

ON

LSWN

OFF

ON

OFF

OFF

OFF

OFF

Link 2

LSW-

OFF

OFF

OFF

OFF

ON

OFF

LSW+

OFF

OFF

OFF

OFF

OFF

ON

Transmission Shift Main Switch

OFF

OFF

OFF

ON

ON

ON
Tip:

The monitor runs when the shift lever is moved through each position (N, R, E, M, - and +).

C235255E03
C234419E03
C234420E03

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Memory

P0820

Gear Lever "X-Y" Position Sensor Circuit

The TCM detects one of the following conditions:

(1-trip detection logic)

  1. Both the LSW4 (LSWN) signal and the LS4C (LSNC) signal are OFF for 5.0 seconds.

  2. Both the LSW4 (LSWN) signal and the LS4C (LSNC) signal are ON for 30.0 seconds.

  3. The condition that both the LSW4 (LSWN) signal and the LS4C (LSNC) signal are ON for 15.0 seconds or more is detected 5 times.

The TCM detects one of the following conditions:

(1-trip detection logic)

  1. Both the LSW3 (LSWS) signal and the LS3C (LSSC) signal are OFF for 5.0 seconds.

  2. Both the LSW3 (LSWS) signal and the LS3C (LSSC) signal are ON for 30.0 seconds.

  3. The condition that both the LSW3 (LSWS) signal and the LS3C (LSSC) signal are ON for 15.0 seconds or more is detected 5 times.

The TCM detects one of the following conditions:

(1-trip detection logic)

  1. Both the LSW2 (LSWR) signal and the LS2C (LSRC) signal are OFF for 5.0 seconds.

  2. Both the LSW2 (LSWR) signal and the LS2C (LSRC) signal are ON for 30.0 seconds.

  3. The condition that both the LSW2 (LSWR) signal and the LS2C (LSRC) signal are ON for 15.0 seconds or more is detected 5 times.

The TCM detects the following conditions simultaneously:

(1-trip detection logic)

  1. Shift lever in N or R.

  2. LSW1 (LSW+) signal or LSW5 (LSW-) signal is ON for 1.0 second.

  • Shift lever position sensor

  • Open or short in shift lever position signal circuit

  • TCM

Does not come on

Comes on

DTC stored

WIRING DIAGRAM

C279533E01

PROCEDURE

  1. READ VALUE USING GTS (SHIFT LEVER SWITCH AND SHIFT LEVER CHECK SIGNAL)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Multi-Mode M/T / Data List / Shift Lever Switch Signal 1 - 5, and Shift Lever Check Signal 1 - 3.

    5. Check that the normal condition specified in the following table is shown on the display when moving the shift lever to each position R, N, E, M, "+" , and "-".

      Powertrain > Multi-Mode M/T > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Shift Lever Switch Signal1

      Shift lever switch signal "+"

      OFF or ON

      OFF: Shift lever not in "+"

      ON: Shift lever in "+"

      LSW1 (LSW+) terminal signal of TCM

      Shift Lever Switch Signal2

      Shift lever switch signal R

      OFF or ON

      OFF: Shift lever not in R

      ON: Shift lever in R

      LSW2 (LSWR) terminal signal of TCM

      Shift Lever Switch Signal3

      Shift lever switch signal M or E

      OFF or ON

      OFF: Shift lever in R or N

      ON: Shift lever in E, M, "+" or "-"

      LSW3 (LSWS) terminal signal of TCM

      Shift Lever Switch Signal4

      Shift lever switch signal N

      OFF or ON

      OFF: Shift lever not in N

      ON: Shift lever in N

      LSW4 (LSWN) terminal signal of TCM

      Shift Lever Switch Signal5

      Shift lever switch signal "-"

      OFF or ON

      OFF: Shift lever not in "-"

      ON: Shift lever in "-"

      LSW5 (LSW-) terminal signal of TCM

      Shift Lever Check Signal1

      Check signal of shift lever switch signal 2

      OFF or ON

      OFF: Shift lever in R

      ON: Shift lever not in R

      LS2C (LSRC) terminal signal of TCM

      Reversal signal of LSW2 (LSWR) (ON and OFF reversed)

      Shift Lever Check Signal2

      Check signal of shift lever switch signal 3

      OFF or ON

      OFF: Shift lever in E, M, "+" or "-"

      ON: Shift lever in R or N

      LS3C (LSSC) terminal signal of TCM

      Reversal signal of LSW3 (LSWS) (ON and OFF reversed)

      Shift Lever Check Signal3

      Check signal of shift lever switch signal 4

      OFF or ON

      OFF: Shift lever in N

      ON: Shift lever not in N

      LS4C (LSNC) terminal signal of TCM

      Reversal signal of LSW4 (LSWN) (ON and OFF reversed)

      Powertrain > Multi-Mode M/T > Data List

      Tester Display

      Shift Lever Switch Signal1

      Shift Lever Switch Signal2

      Shift Lever Switch Signal3

      Shift Lever Switch Signal4

      Shift Lever Switch Signal5

      Shift Lever Check Signal1

      Shift Lever Check Signal2

      Shift Lever Check Signal3

      OK

      When the shift lever is operated, the normal condition listed above is shown on the GTS.

    Result

    Proceed to

    OK

    NG
    OK

    SYMPTOM SIMULATION AND DTC CHECK

    Click here

    NG

  2. INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (SHIFT LEVER POSITION SENSOR)

    1. Disconnect the shift lever position sensor connector.

      C276267E03

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

      Tip:

      The shift lever position sensor connector has no terminals in locations of 1, 8, 7, and 14.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      2 (LSRC) - 3 (LSWS)

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

      Below 1 Ω

      2 (LSRC) - 13 (LSNC)

      Below 1 Ω

      3 (LSWS) - 4 (COM1)

      Below 1 Ω

      3 (LSWS) - 11 (COM2)

      Below 1 Ω

      2 (LSRC) - 4 (COM1)

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

      Below 1 Ω

      2 (LSRC) - 11 (COM2)

      Below 1 Ω

      2 (LSRC) - 6 (LSWN)

      Shift lever in N

      Below 1 Ω

      2 (LSRC) - 10 (LSSC)

      Below 1 Ω

      4 (COM1)- 6 (LSWN)

      Below 1 Ω

      6 (LSWN) - 10 (LSSC)

      Below 1 Ω

      6 (LSWN) - 11 (COM2)

      Below 1 Ω

      4 (COM1) - 5 (LSW+)

      Shift lever in "+"

      Below 1 Ω

      5 (LSW+) - 11 (COM2)

      Below 1 Ω

      4 (COM1) - 9 (LSWR)

      Shift lever in R

      Below 1 Ω

      9 (LSWR) - 10 (LSSC)

      Below 1 Ω

      9 (LSWR) - 11 (COM2)

      Below 1 Ω

      9 (LSWR) - 13 (LSNC)

      Below 1 Ω

      10 (LSSC) - 13 (LSNC)

      Below 1 Ω

      4 (COM1) - 10 (LSSC)

      Shift lever in R or N

      Below 1 Ω

      10 (LSSC) - 11 (COM2)

      Below 1 Ω

      4 (COM1) - 11 (COM2)

      Always

      Below 1 Ω

      4 (COM1) - 12 (LSW-)

      Shift lever in "-"

      Below 1 Ω

      11 (COM2) - 12 (LSW-)

      Below 1 Ω

      4 (COM1) - 13 (LSNC)

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

      Below 1 Ω

      11 (COM2) - 13 (LSNC)

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TCM - SHIFT LEVER POSITION SENSOR)

    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

      E104-11 (LS4C) - E102-13 (LSNC)

      Always

      Below 1 Ω

      E104-12 (LS3C) - E102-10 (LSSC)

      Always

      Below 1 Ω

      E104-13 (LS2C) - E102-2 (LSRC)

      Always

      Below 1 Ω

      E104-15 (LSW5) - E102-12 (LSW-)

      Always

      Below 1 Ω

      E104-16 (LSW4) - E102-6 (LSWN)

      Always

      Below 1 Ω

      E104-17 (LSW3) - E102-3 (LSWS)

      Always

      Below 1 Ω

      E104-18 (LSW2) - E102-9 (LSWR)

      Always

      Below 1 Ω

      E104-19 (LSW1) - E102-5 (LSW+)

      Always

      Below 1 Ω

      E104-11 (LS4C) - Body ground

      Always

      10 kΩ or higher

      E104-12 (LS3C) - Body ground

      Always

      10 kΩ or higher

      E104-13 (LS2C) - Body ground

      Always

      10 kΩ or higher

      E104-15 (LSW5) - Body ground

      Always

      10 kΩ or higher

      E104-16 (LSW4) - Body ground

      Always

      10 kΩ or higher

      E104-17 (LSW3) - Body ground

      Always

      10 kΩ or higher

      E104-18 (LSW2) - Body ground

      Always

      10 kΩ or higher

      E104-19 (LSW1) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (SHIFT LEVER POSITION SENSOR - BODY GROUND)

    1. C195868C02

      *a

      Front view of wire harness connector

      (to Shift Lever Position Switch)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E102-4 (COM1) - Body ground

      Always

      Below 1 Ω

      E102-11 (COM2) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE TCM

    1. Replace the TCM.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  6. PERFORM INITIALIZATION

    1. Perform the initialization and learning procedure.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

    END