Last Modified: 4-30-2014 6.6 C Doc ID: RM000000W8400KX
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0705; Transmission Range Sensor Circuit Malfunction (PRNDL Input); 2006 MY LX470 [05/2005 -        ]

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 either condition below is met (2 trip detection logic):

  • All switches are OFF simultaneously for P, R, N, D, 3 and 2 positions
  • 2 or more switches are ON simultaneously for D, 4, 3, 2 and L positions
  • Open or short in PNP switch circuit
  • PNP switch
  • ECM

MONITOR DESCRIPTION

These DTCs indicate a problem with the PNP switch and the wire harness in the PNP switch circuit.

The PNP switch detects the shift lever position and sends a signal to the ECM.

For security, the PNP switch detects the shift lever position so that the engine can be started only when the shift lever is on P or N.

The PNP switch sends a signal to the ECM according to the shift lever position (R, D, 4, 3, 2 or L).

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 (D)

2 sec.

Condition (C)

60 sec.

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is 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 inputs at the same time

2 or more

P switch

ON

N switch

ON

R switch

ON

D switch

ON

3 switch

ON

2 switch

ON

Condition (B)

Number of the following signal inputs at the same time

2 or more

NSW switch

OFF

R switch

ON

D switch

ON

3 switch

ON

2 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

3 switch

OFF

2 switch

OFF

Condition (D)

Both (i) and (ii) are met (i) One of the following conditions is met

NSW switch

ON

P switch

ON

N switch

ON

R switch

ON

(ii) One of the following conditions is met

4 switch

ON

L switch

ON

COMPONENT OPERATING RANGE

Park/Neutral position switch

Park/Neutral position switch sends only one signal to the ECM.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Using the intelligent tester's DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save 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.

  1. Warm up the engine.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
  4. Turn the ignition switch ON.
  5. Turn the intelligent tester ON.
  6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
  7. Follow the instructions on the tester and read the DATA LIST.

Item

Measurement Item/

Range (Display)

Normal Condition

Diagnostic Note

PNP SW (NSW)

PNP switch status/

ON or OFF

Shift lever is:

On P or N: ON

Not on P or N: OFF

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

LOW

PNP switch status/

ON or OFF

Shift lever is:

On L: ON

Not on L: OFF

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

2ND

PNP switch status/

ON or OFF

Shift lever is:

On 2: ON

Not on 2: OFF

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

3RD

PNP switch status/

ON or OFF

Shift lever is:

On 3: ON

Not on 3: OFF

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

4th/DRIVE

PNP switch status/

ON or OFF

Shift lever is:

On 4: ON

Not on 4: OFF

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

REVERSE

PNP switch status/

ON or OFF

Shift lever is:

On R: ON

Not on R: OFF

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

DRIVE

PNP switch status/

ON or OFF

Shift lever is:

On D: ON

Not on D: OFF

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

PROCEDURE

1.

INSPECT PARK/NEUTRAL POSITION SWITCH

(a) Disconnect the P1 PNP switch connector.

(b) Measure the resistance of the PNP switch when the shift lever is moved to each position.

Standard resistanc:

Tester Connection

Shift Lever Position

Specified Condition

4 (B) - 5 (L)

P or N

Below 1 Ω

4 (B) - 5 (L)

Not on P or N

10 kΩ or higher

1 (RL) - 2 (RB)

R

Below 1 Ω

1 (RL) - 2 (RB)

Not on R

10 kΩ or higher

2 (RB) - 7 (DL)

D

Below 1 Ω

2 (RB) - 7 (DL)

Not on D

10 kΩ or higher

2 (RB) - 3 (2L)

2

Below 1 Ω

2 (RB) - 3 (2L)

Not on 2

10 kΩ or higher

2 (RB) - 8 (LL)

L

Below 1 Ω

2 (RB) - 8 (LL)

Not on L

10 kΩ or higher
NG

REPLACE PARK/NEUTRAL POSITION SWITCH

OK

2.

INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the A52 switch connector.

(b) Measure the resistance of the switch when the shift lever is moved to each position.

Standard resistance:

Tester Connection

Shift Lever Position

Specified Condition

1 (NSSD) - 8 (AT4)

D

10 kΩor higher

1 (NSSD) - 8 (AT4)

3

Below 1 Ω

6 (NSSL) - 12 (ATL)

2

10 kΩ or higher

6 (NSSL) - 12 (ATL)

L

Below 1 Ω
NG

REPLACE TRANSMISSION CONTROL SWITCH

OK

3.

CHECK WIRE HARNESS (ECM - BATTERY)

(a) Turn the ignition switch ON.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Shift Lever Position

Specified Condition

E9-11 (R) - Body ground

R

10 to 14 V*

E9-11 (R) - Body ground

Not on R

Below 1 V

E9-21 (D) - Body ground

D or 3

10 to 14 V

E9-21 (D) - Body ground

Not on D or 3

Below 1 V

E9-19 (3) - Body ground

3

10 to 14 V

E9-19 (3) - Body ground

Not on 3

Below 1 V

E9-10 (2) - Body ground

2

10 to 14 V

E9-10 (2) - Body ground

Not on 2

Below 1 V

E9-9 (L) - Body ground

L

10 to 14 V

E9-9 (L) - Body ground

Not on L

Below 1 V

HINT:

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

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE ECM