Home › Drivetrain › Automatic Transmission/Transaxle › AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM
Last Modified: 11-27-2007 1.6 C
Service Category: Drivetrain Section: Automatic Transmission/Transaxle
Model Year: 2008 Model: LX570 Doc ID: RM000000W8409DX
Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: DESCRIPTION (2008 LX570)

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 Code

DTC Detection Condition

Trouble Area

P0705

When 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
  • N input signal
  • R input signal
  • D input signal

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

  • NSW input signal
  • R input signal
  • D input signal

(C) Any of the following signals are ON for 2.0 sec. or more when the shift lever is in S (2 trip detection logic).

  • NSW input signal
  • P input signal
  • N input signal
  • R input signal

(D) All signals are OFF simultaneously for P, R, N, D and NSW (2 trip detection logic).
  • Park/neutral position switch assembly
  • Transmission control switch (transmission floor shift assembly)
  • Open or short in park/neutral position switch circuit
  • ECM

MONITOR DESCRIPTION

This DTC indicates 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 sec.

Condition (D)

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

Engine switch

On (IG)

Battery voltage

10.5 V or higher

TYPICAL MALFUNCTION THRESHOLDS

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

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 engine switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

(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

Shift lever:

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

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

Shift SW Status (R Range)

PNP switch status/

ON or OFF

Shift lever:

  • In R: ON
  • Not in R: OFF

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

Shift SW Status (P Range)

PNP switch status/

ON or OFF

Shift lever:

  • In P: ON
  • Not in P: OFF

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

Shift SW Status (N Range)

PNP switch status/

ON or OFF

Shift lever:

  • In N: ON
  • Not in N: OFF

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

Shift SW Status (D Range)

PNP switch status/

ON or OFF

Shift lever:

  • In D: ON
  • Not in D: OFF

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

Shift lever:

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

-

PROCEDURE

1.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Disconnect the C19 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
OK

2.

INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the E52 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
OK

3.

CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE)

(a) Disconnect the C19 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

C19-2 (RB) - Body ground

Engine switch on (IG)

11 to 14 V

C19-2 (RB) - Body ground

Engine switch off

Below 1 V
OK

4.

CHECK TRANSMISSION CONTROL SWITCH (POWER SOURCE)

(a) Disconnect the E52 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

E52-3 (IG) - Body ground

Engine switch on (IG)

11 to 14 V

E52-3 (IG) - Body ground

Engine switch off

Below 1 V
OK

5.

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

(a) Disconnect the C53 ECM connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition
  • C53-2 (P) - Body ground
  • C53-120 (NSW) - Body ground
  • Engine switch on (IG)
  • Shift lever in P

11 to 14 V

C53-26 (R) - Body ground
  • Engine switch on (IG)
  • Shift lever in R

11 to 14 V*
  • C53-25 (N) - Body ground
  • C53-120 (NSW) - Body ground
  • Engine switch on (IG)
  • Shift lever in N

11 to 14 V

C53-27 (D) - Body ground
  • Engine switch on (IG)
  • Shift lever in D

11 to 14 V
  • C53-2 (P) - Body ground
  • C53-120 (NSW) - Body ground
  • Engine switch on (IG)
  • Shift lever not in P

Below 1 V

C53-26 (R) - Body ground
  • Engine switch on (IG)
  • Shift lever not in R

Below 1 V
  • C53-25 (N) - Body ground
  • C53-120 (NSW) - Body ground
  • Engine switch on (IG)
  • Shift lever not in N

Below 1 V

C53-27 (D) - Body ground
  • Engine switch on (IG)
  • Shift lever not in D

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 A38 ECM connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A38-25 (S) - Body ground
  • Engine switch on (IG)
  • Shift lever in S, "+" or "-"

11 to 14 V

A38-25 (S) - Body ground
  • Engine switch on (IG)
  • Shift lever not in S, "+" or "-"

Below 1 V
OK