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

Tech Tips

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

A01TC08E03
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)
A01T9V6E03
A01TA42E03
Shift Lever Position Sensor Terminals and Sensor Handle Movement
*1 Link 2
*2 Link 1
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

A01T9D6E01
*a Shift Lever Position Sensor
*b Shift Lock Control Unit Assembly (Transmission Shift Main Switch)

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.

      A01TCWCE03

    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 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. A01T93TC02
      *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.

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. PERFORM INITIALIZATION


    1. Perform the initialization and learning procedure.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END