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 a Link 1 circuit that detects the shift lever positions, R, N, E and M, and a 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 present 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 the R, N, or E position, and turns on in the M, [+], or [-] position.

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 present shift lever position from these signals and operates the actuators to change the gear position.

Contact Points 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

Tech Tips

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

A005JAKE01
Shift Lever Position Sensor and Transmission Shift Main Switch Movement
*1 Fore-aft Movement
*2 (Shift Lever Position Sensor)
*3 Side-to-Side Movement (Transmission Shift Main Switch)
A005H3AE04
A005HVXE04
Shift Lever Position Sensor Terminals and Sensor Handle Movement
*1 Link2
*2 Link1
DTC No. DTC Detection Condition Trouble Area
P0820

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.

  • Shift lever position sensor

  • Open or short in shift lever position signal circuit

  • TCM

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 position is N or R.

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

  • Shift lever position sensor

  • Short in shift lever position signal circuit

  • TCM

WIRING DIAGRAM

A005JFAE09
*a SHIFT LEVER POSITION SENSOR
*b SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION SHIFT MAIN SWITCH)

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester 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 -.

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note

      Shift Lever Switch Signal1

      [Shift SW Sig1]

      Shift lever switch signal (+):

      ON or OFF

      ON: Shift lever position in (+)

      OFF: Other than above

      		 LSW1 (LSW+) terminal signal of TCM

      Shift Lever Switch Signal2

      [Shift SW Sig2]

      Shift lever switch signal (R):

      ON or OFF

      ON: Shift lever position in (R)

      OFF: Other than above

      		 LSW2 (LSWR) terminal signal of TCM

      Shift Lever Switch Signal3

      [Shift SW Sig3]

      Shift lever switch signal (M) or (E):

      ON or OFF

      ON: Shift lever position in (E), (M), (+) or (-)

      OFF: Shift lever position in (R) or (N)

      		 LSW3 (LSWS) terminal signal of TCM

      Shift Lever Switch Signal4

      [Shift SW Sig4]

      Shift lever switch signal (N):

      ON or OFF

      ON: Shift lever position in (N)

      OFF: Other than above

      		 LSW4 (LSWN) terminal signal of TCM

      Shift Lever Switch Signal5

      [Shift SW Sig5]

      Shift lever switch signal (-):

      ON or OFF

      ON: Shift lever position in (-)

      OFF: Other than above

      		 LSW5 (LSW-) terminal signal of TCM

      Shift Lever Check Signal1

      [Shift Chek Sig1]

      Check signal of shift lever switch signal 2:

      ON or OFF

      OFF: Shift lever position in (R)

      ON: Other than above

      LS2C (LSRC) terminal signal of TCM

      Reversal signal of LSW2 (LSWR)

      (ON and OFF reversed)

      Shift Lever Check Signal2

      [Shift Chek Sig2]

      Check signal of shift lever switch signal 3:

      ON or OFF

      OFF: Shift lever position in (E), (M), (+) or (-)

      ON: Shift lever position in (R) or (N)

      LS3C (LSSC) terminal signal of TCM

      Reversal signal of LSW3 (LSWS)

      (ON and OFF reversed)

      Shift Lever Check Signal3

      [Shift Chek Sig3]

      Check signal of shift lever switch signal 4:

      ON or OFF

      OFF: Shift lever position in (N)

      ON: Other than above

      LS4C (LSNC) terminal signal of TCM

      Reversal signal of LSW4 (LSWN)

      (ON and OFF reversed)
      OK
      When the shift lever is operated, the normal condition listed above is shown on the tester.

    OK

    SYMPTOM SIMULATION AND DTC CHECK Click here

    NG

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


    1. Disconnect the F71 shift lever position sensor connector.

      A005MEQE01

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

      Tech Tips

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (LSRC) - 3 (LSWS)

      Shift lever is 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 is in

      N, E, M, "+" or "-"

      		 Below 1 Ω
      2 (LSRC) - 11 (COM2) Below 1 Ω
      2 (LSRC) - 6 (LSWN)

      Shift lever is 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 is in

      "+"

      		 Below 1 Ω
      5 (LSW+) - 11 (COM2) Below 1 Ω
      4 (COM1) - 9 (LSWR)

      Shift lever is 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 is 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 is in

      "-"

      		 Below 1 Ω
      11 (COM2) - 12 (LSW-) Below 1 Ω
      4 (COM1) - 13 (LSNC)

      Shift lever is in

      R, E, M, "+" or "-"

      		 Below 1 Ω
      11 (COM2) - 13 (LSNC) Below 1 Ω

    NG

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY Click here

    OK

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


    1. Disconnect the F68 TCM connector.

    2. Disconnect the F71 shift lever position sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F68-11 (LS4C) - F71-13 (LSNC) Always Below 1 Ω
      F68-12 (LS3C) - F71-10 (LSSC) Always Below 1 Ω
      F68-13 (LS2C) - F71-2 (LSRC) Always Below 1 Ω
      F68-15 (LSW5) - F71-12 (LSW-) Always Below 1 Ω
      F68-16 (LSW4) - F71-6 (LSWN) Always Below 1 Ω
      F68-17 (LSW3) - F71-3 (LSWS) Always Below 1 Ω
      F68-18 (LSW2) - F71-9 (LSWR) Always Below 1 Ω
      F68-19 (LSW1) - F71-5 (LSW+) Always Below 1 Ω
      F68-11 (LS4C) - Body ground Always 10 kΩ or higher
      F68-12 (LS3C) - Body ground Always 10 kΩ or higher
      F68-13 (LS2C) - Body ground Always 10 kΩ or higher
      F68-15 (LSW5) - Body ground Always 10 kΩ or higher
      F68-16 (LSW4) - Body ground Always 10 kΩ or higher
      F68-17 (LSW3) - Body ground Always 10 kΩ or higher
      F68-18 (LSW2) - Body ground Always 10 kΩ or higher
      F68-19 (LSW1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the F71 shift lever position sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F71-4 (COM1) - Body ground Always Below 1 Ω
      F71-11 (COM2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

  6. PERFORM INITIALIZATION


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


    NEXT

    END