Toyota 4Runner manuals

Toyota 4Runner: Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)

Toyota 4Runner Service Manual / Drivetrain / A750e Automatic Transmission / Transaxle / Automatic Transmission System / Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)

DESCRIPTION

The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the ECM.

DTC Code

DTC Detection Condition

Trouble Area

P0705

One of the following conditions is met:

(A) Any 2 or more of the following signals are ON simultaneously (2-trip detection logic):

  • P input signal is ON
  • N input signal is ON
  • NSW input signal is ON
  • R input signal is ON
  • D input signal is ON

(B) Any of the following signals is ON for 2.0 sec. or more with the shift lever in S (2-trip detection logic):

  • P input signal is ON
  • N input signal is ON
  • NSW input signal is ON
  • R input signal is ON

(C) All switches are OFF simultaneously for P, R, N, D and NSW (2-trip detection logic).

  • Open or short in park/neutral position switch circuit
  • Transmission control switch (transmission floor shift assembly)
  • Park/neutral position switch
  • ECM

MONITOR DESCRIPTION

This DTC indicates a problem with the park/neutral position switch and wire harness in the park/neutral position switch circuit.

The park/neutral position switch detects the shift lever position (P, R, N, D or S) and sends a signal to the ECM.

For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the shift lever is in P or N.

The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will illuminate the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs

P0705: Park/neutral position switch/Verify switch input

Required sensors/Components

Park/neutral position switch

Frequency of operation

Continuous

Duration

Condition (A) and (B)

2 sec.

Condition (C)

60 sec.

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not stored

None

Battery voltage

8 V or higher

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

  • One of the following conditions is met: Condition (A), (B) or (C)
    Condition (A)
    • When 2 or more of the following signals are input at the same time

      P switch

      ON

      N switch

      ON

      NSW switch

      ON

      R switch

      ON

      D switch

      ON

    Condition (B)
    • When the shift lever is in S, one of the following conditions is met

      P switch

      ON

      N switch

      ON

      NSW switch

      ON

      R switch

      ON

    Condition (C)
    • All of the following conditions are met

      P switch

      OFF

      N switch

      OFF

      NSW switch

      OFF

      R switch

      OFF

      D switch

      OFF

COMPONENT OPERATING RANGE

Park/neutral position switch

The park/neutral position switch sends only one signal to the ECM

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).


1. DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Warm up the engine.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Data List.

(g) According to the display on the Techstream, read the Data List.

Engine and ECT

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Neutral Position SW Signal

PNP switch status/

ON or OFF

  • ON: Shift lever in P or N
  • OFF: Shift lever not in P or N

When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the PNP switch or shift cable maybe incorrect.

Shift SW Status (P Range)

PNP switch status/

ON or OFF

  • ON: Shift lever in P
  • OFF: Shift lever not in P

When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the PNP switch or shift cable maybe incorrect.

Shift SW Status (R Range)

PNP switch status/

ON or OFF

  • ON: Shift lever in R
  • OFF: Shift lever not in R

When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the PNP switch or shift cable maybe incorrect.

Shift SW Status (N Range)

PNP switch status/

ON or OFF

  • ON: Shift lever in N
  • OFF: Shift lever not in N

When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the PNP switch or shift cable maybe incorrect.

Sports Shift Up SW

Sport shift up switch status/

ON or OFF

  • ON: Shift lever held in "+" (up-shift)
  • OFF: Shift lever not held in "+" (up-shift)

-

Sports Shift Down SW

Sport shift down switch status/

ON or OFF

  • ON: Shift lever held in "-" (down-shift)
  • OFF: Shift lever not held in "-" (down-shift)

-

Sports Mode Selection SW

Sport mode select switch status/

ON or OFF

  • ON: Shift lever in S, "+" or "-"
  • OFF: Shift lever not in S, "+" or "-"

-

Shift SW Status (D Range)

PNP switch status/

ON or OFF

  • ON: Shift lever in D, S, "+" or "-"
  • OFF: Shift lever not in D, S, "+" or "-"

When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the PNP switch or shift cable maybe incorrect.

PROCEDURE

1.

INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the F76 transmission control switch connector.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (IG) - 7 (S)

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

Below 1 Ω

3 (IG) - 7 (S)

Shift lever not in S, "+" or "-"

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transmission Control Switch)


NG

REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

OK

2.

CHECK TRANSMISSION CONTROL SWITCH (POWER SOURCE)

(a) Disconnect the F76 transmission control switch connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F76-3 (IG) - Body ground

Ignition switch ON

11 to 14 V

F76-3 (IG) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Transmission Control Switch)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY)

OK

3.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Disconnect the B42 park/neutral position switch connector.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

  • 2 (RB) - 6 (PL)
  • 4 (B) - 5 (L)

Shift lever in P

Below 1 Ω

2 (RB) - 1 (RL)

Shift lever in R

Below 1 Ω

  • 2 (RB) - 9 (NL)
  • 4 (B) - 5 (L)

Shift lever in N

Below 1 Ω

2 (RB) - 7 (DL)

  • Shift lever in D
  • Shift lever in S, "+" or "-"

Below 1 Ω

  • 2 (RB) - 6 (PL)
  • 4 (B) - 5 (L)

Shift lever not in P

10 kΩ or higher

2 (RB) - 1 (RL)

Shift lever not in R

10 kΩ or higher

  • 2 (RB) - 9 (NL)
  • 4 (B) - 5 (L)

Shift lever not in N

10 kΩ or higher

2 (RB) - 7 (DL)

  • Shift lever not in D
  • Shift lever not in S, "+" or "-"

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Park/Neutral Position Switch)


NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

OK

4.

CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE)

(a) Disconnect the B42 park/neutral position switch connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B42-2 (RB) - Body ground

Ignition switch ON

11 to 14 V

B42-2 (RB) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Park/Neutral Position Switch)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)

OK

5.

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

(a) Disconnect the B36 and B37 ECM connectors.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

B36-35 (P) - Body ground

  • Ignition switch ON
  • Shift lever in P

11 to 14 V

B36-28 (R) - Body ground

  • Ignition switch ON
  • Shift lever in R

11 to 14 V*

B36-29 (N) - Body ground

  • Ignition switch ON
  • Shift lever in N

11 to 14 V

B36-27 (D) - Body ground

  • Ignition switch ON
  • Shift lever in D

11 to 14 V

B37-2 (NSW) - Body ground

  • Ignition switch ON
  • Shift lever not in P or N

11 to 14 V

B36-35 (P) - Body ground

  • Ignition switch ON
  • Shift lever not in P

Below 1 V

B36-28 (R) - Body ground

  • Ignition switch ON
  • Shift lever not in R

Below 1 V

B36-29 (N) - Body ground

  • Ignition switch ON
  • Shift lever not in N

Below 1 V

B36-27 (D) - Body ground

  • Ignition switch ON
  • Shift lever not in D

Below 1 V

B37-2 (NSW) - Body ground

  • Ignition switch ON
  • Shift lever in P or N

Below 1 V

Text in Illustration

*a

Rear view of wire harness connector

(to ECM)

HINT:

*: The voltage will drop slightly due to the illumination of the back-up light.


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the F50 ECM connector.


(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F50-24 (S) - Body ground

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

11 to 14 V

F50-24 (S) - Body ground

Shift lever not in S, "+" or "-"

Below 1 V

Text in Illustration

*a

Rear view of wire harness connector

(to ECM)


OK

REPLACE ECM


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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