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

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2tr-fe) / 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

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

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

NOTICE:

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

HINT:

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

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

(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)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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)

GO TO STEP 7

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)

REPLACE PARK/NEUTRAL POSITION SWITCH

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))

REPAIR OR REPLACE HARNESS OR CONNECTOR

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))

REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

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.

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.

REPLACE ECM

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.

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

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

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