Last Modified: 11-29-2007 1.6 C
Service Category: Drivetrain Section: Automatic Transmission/Transaxle
Model Year: 2008 Model: Sequoia Doc ID: RM000000W840A6X
Title: A750E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

P0705

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

P0705

When one of 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
  • R input signal is ON
  • D input signal is ON

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

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

(C) When any of following conditions is met for 2.0 seconds or more in the S position (2 trip detection logic)

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

(D) All switches are OFF simultaneously for P, R, N and D positions (2 trip detection logic)
  • Open or short in park/neutral position switch circuit
  • Park/neutral position switch
  • Transmission control switch
  • ECM

MONITOR DESCRIPTION

These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.

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

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), (B) and (C)

2 seconds

Condition (D)

60 seconds

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not present

None

Ignition switch

ON

Battery voltage

10.5 V or more

TYPICAL MALFUNCTION THRESHOLDS

One of the following conditions is met: Condition (A), (B), (C) or (D)

Condition (A)

Number of the following signal input at the same time

2 or more

P switch

ON

N switch

ON

R switch

ON

D switch

ON

Condition (B)

Number of the following signal inputs at the same time

2 or more

NSW switch

ON

R switch

ON

D switch

ON

Condition (C)

When the shift lever is in S, one of the following conditions is met

NSW switch

ON

P switch

ON

N switch

ON

R switch

ON

Condition (D)

All of the following conditions are met

P switch

OFF

NSW switch

OFF

N 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

INSPECTION PROCEDURE

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 / ECT / Data List.

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

ECT

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Neutral Position SW Signal

PNP switch status/

ON or OFF

Shift lever is:

  • In P or N: ON
  • Not or P or N: OFF

When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect

Shift SW Status (R Range)

PNP switch status/

ON or OFF

Shift lever is:

  • In R: ON
  • Not in R: OFF

When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect

Shift SW Status (P Range)

PNP switch status/

ON or OFF

Shift lever is:

  • In P: ON
  • Not in P: OFF

When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect

Shift SW Status (N Range)

PNP switch status/

ON or OFF

Shift lever is:

  • In N: ON
  • Not in N: OFF

When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect

Shift SW Status (D Range)

PNP switch status/

ON or OFF

Shift lever is:

  • In D: ON
  • Not in D: OFF

When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect

Sports Shift Up SW

Sport shift up switch status/

ON or OFF
  • ON: Continuously shift to "+" (up-shift)
  • OFF: Release "+" (up-shift)

-

Sports Shift Down SW

Sport shift down switch status/

ON or OFF
  • ON: Continuously shift to "-" (down-shift)
  • OFF: Release "-" (down-shift)

-

Sports Mode Selection SW

Sport mode select switch status/

ON or OFF

Shift lever position is:

  • ON: In S, "+" and "-"
  • OFF: Not in S, "+" and "-"

-

PROCEDURE

1.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Disconnect the D21 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, "+" and "-"

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, "+" and "-"

10 kΩ or higher
OK

2.

INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the H31 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, "+" and "-"

Below 1 Ω

3 (IG) - 7 (S)

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

10 kΩ or higher
OK

3.

CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE)

(a) Disconnect the D21 park/neutral position switch 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

Switch Condition

Specified Condition

D21-2 (RB) - Body ground

Ignition switch ON

11 to 14 V

D21-2 (RB) - Body ground

Ignition switch off

Below 1 V
OK

4.

CHECK TRANSMISSION CONTROL SWITCH (POWER SOURCE)

(a) Disconnect the H31 transmission control switch 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

Switch Condition

Specified Condition

H31-3 (IG) - Body ground

Ignition switch ON

11 to 14 V

H31-3 (IG) - Body ground

Ignition switch off

Below 1 V
OK

5.

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

(a) Disconnect the D56 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

D56-2 (P) - Body ground
  • Ignition switch ON
  • Shift lever in P

11 to 14 V

D56-26 (R) - Body ground
  • Ignition switch ON
  • Shift lever in R

11 to 14 V*

D56-25 (N) - Body ground
  • Ignition switch ON
  • Shift lever in N

11 to 14 V

D56-27 (D) - Body ground
  • Ignition switch ON
  • Shift lever in D

11 to 14 V

D56-120 (NSW) - Body ground
  • Ignition switch ON
  • Shift lever not in P or N

11 to 14 V

D56-2 (P) - Body ground
  • Ignition switch ON
  • Shift lever not in P

Below 1 V

D56-26 (R) - Body ground
  • Ignition switch ON
  • Shift lever not in R

Below 1 V

D56-25 (N) - Body ground
  • Ignition switch ON
  • Shift lever not in N

Below 1 V

D56-27 (D) - Body ground
  • Ignition switch ON
  • Shift lever not in D

Below 1 V

D56-120 (NSW) - Body ground
  • Ignition switch ON
  • Shift lever in P or N

Below 1 V

HINT:

*: The voltage will drop slightly due to the turning on of the back up light.

OK

6.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the A27 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

A27-25 (S) - Body ground

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

11 to 14 V

A27-25 (S) - Body ground

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

Below 1 V
OK