Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)

DESCRIPTION

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

DTC No.

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):

  • One of the following conditions is met.
    • P input signal is ON
    • N input signal is ON
    • NSW input signal is ON
  • R input signal
  • D input signal

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

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

(C) All signals are OFF simultaneously for NSW, P, R, N and D (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 the wire harness in the park/neutral position switch circuit.

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

For safety, 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) and (B)

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 stored

None

Ignition switch

ON

Battery voltage

10.5 V or more

Starter

off

TYPICAL MALFUNCTION THRESHOLDS

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

  • Condition (A)

Any two of the following conditions are met:

Conditions 1, 2 and 3

1. One of the following conditions is met:

Conditions (a), (b) or (c)

(a). P position switch

ON

(b). Park/neutral position switch (NSW)

ON

(c). N position switch

ON

2. R position switch

ON

3. D position switch

ON

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

P position switch

ON

N position switch

ON

Park/neutral position switch (NSW)

ON

R position switch

ON

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

P position switch

OFF

N position switch

OFF

Park/neutral position switch (NSW)

OFF

R position switch

OFF

D position 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

CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs (See page Perform registration and/or initialization when parts related to the ).
  • Perform registration and/or initialization when parts related to the automatic transmission are replaced (See page Inspect the fuses for circuits related to this system before performing ).
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Turn the ignition switch to ON.*1
  2. Wait with the shift lever in each position (P, R, N and D) for 60 seconds or more.*2
  3. Wait for 2 seconds or more with the shift lever in S.*3
  4. Turn the ignition switch off.
  5. Perform steps (*1) through (*3) again.
  6. Check for DTCs again (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

Park/neutral position 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 park/neutral position switch or the shift cable may be incorrect.

Shift SW Status (P Range)

Park/neutral position 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 park/neutral position switch or the shift cable may be incorrect.

Shift SW Status (R Range)

Park/neutral position 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 park/neutral position switch or the shift cable may be incorrect.

Shift SW Status (N Range)

Park/neutral position 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 park/neutral position switch or the shift cable may be incorrect.

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)

Park/neutral position 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 park/neutral position switch or the shift cable may be incorrect.

PROCEDURE

1.

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

(a) Disconnect the 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

P1-2 (RB) - Body ground

Ignition switch ON

11 to 14 V

P1-2 (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

OK

2.

CHECK HARNESS AND CONNECTOR (NSW TERMINAL VOLTAGE)

(a) Disconnect the 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

P1-4 (B) - Body ground

Ignition switch ON

11 to 14 V

P1-4 (B) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Park/Neutral Position Switch)

NG

GO TO STEP 7

OK

3.

INSPECT PARK/NEUTRAL POSITION SWITCH

(a) Disconnect the P1 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

4 (B) - 5 (L)

Shift lever in P or N

Below 1 Ω

2 (RB) - 6 (PL)

Shift lever in P

Below 1 Ω

2 (RB) - 1 (RL)

Shift lever in R

Below 1 Ω

2 (RB) - 9 (NL)

Shift lever in N

Below 1 Ω

2 (RB) - 7 (DL)

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

Below 1 Ω

4 (B) - 5 (L)

Shift lever not in P or N

10 kΩ or higher

2 (RB) - 6 (PL)

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)

Shift lever not in N

10 kΩ or higher

2 (RB) - 7 (DL)

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

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Park/Neutral Position Switch)

NG

REPLACE PARK/NEUTRAL POSITION SWITCH

OK

4.

CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY))

(a) Disconnect the transmission control switch (transmission floor shift assembly) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

T23-4 (IG) - Body ground

Ignition switch ON

11 to 14 V

T23-4 (IG) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Transmission Control Switch (Transmission Floor Shift Assembly))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

(a) Disconnect the T23 transmission control switch (transmission floor shift assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (IG) - 5 (S)

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

Below 1 Ω

4 (IG) - 5 (S)

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

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transmission Control Switch (Transmission Floor Shift Assembly))

NG

REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

OK

6.

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

(a) Disconnect the ECM connectors.

(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

E19-25 (P) - Body ground

  • Ignition switch ON
  • Shift lever in P

11 to 14 V

E20-8 (R) - Body ground

  • Ignition switch ON
  • Shift lever in R

11 to 14 V*

E19-24 (N) - Body ground

  • Ignition switch ON
  • Shift lever in N

11 to 14 V

E20-18 (D) - Body ground

  • Ignition switch ON
  • Shift lever in D, S, "+" or "-"

11 to 14 V

E19-30 (S) - Body ground

  • Ignition switch ON
  • Shift lever in S, "+" or "-"

11 to 14 V

E19-25 (P) - Body ground

  • Ignition switch ON
  • Shift lever not in P

Below 1 V

E20-8 (R) - Body ground

  • Ignition switch ON
  • Shift lever not in R

Below 1 V

E19-24 (N) - Body ground

  • Ignition switch ON
  • Shift lever not in N

Below 1 V

E20-18 (D) - Body ground

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

Below 1 V

E19-30 (S) - Body ground

  • Ignition switch ON
  • Shift lever not in S, "+" or "-"

Below 1 V

Text in Illustration

*a

Rear view of wire harness connector

(to ECM)

HINT:

*: The voltage will drop slightly due to lighting up of the backup light.

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

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

(a) Disconnect the P1 park/neutral position switch connector.

(b) Disconnect the E18 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P1-4 (B) - E18-15 (NSW)

Always

Below 1 Ω

P1-4 (B) or E18-15 (NSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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