Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Neutral Position Switch Circuit

DESCRIPTION

The ECM uses the neutral position switch installed to the manual transmission assembly to detect when the transmission is in the neutral position.

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (NEUTRAL SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Neutral Switch.

(e) Read the value when the shift lever is in neutral and any other position

OK:

Tester Display

Condition

Normal Condition

Neutral Position Switch

Shift lever is in neutral

ON

Shift lever is in any position other than neutral

OFF

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK TERMINAL VOLTAGE (VC)

(a) Turn the ignition switch to ON.

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

*a

Component with harness connected

(ECM)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

E10-23 (VC) - E9-23 (ETHW)

Ignition switch ON

4.8 to 5.2 V

NG

GO TO SFI SYSTEM

OK

3.

CHECK HARNESS AND CONNECTOR (ECM - NEUTRAL POSITION SWITCH)

(a) Disconnect the E9, E10 and E11 ECM connectors.

(b) Disconnect the N37 neutral position switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E10-23 (VC) - N37-1 (W1)

Always

Below 1 Ω

E11-22 (NPSW) - N37-2 (TMN)

Always

Below 1 Ω

E9-23 (ETHW) - N37-3 (F+)

Always

Below 1 Ω

E10-23 (VC) or N37-1 (W1) - Body ground

Always

10 kΩ or higher

E11-22 (NPSW) or N37-2 (TMN) - Body ground

Always

10 kΩ or higher

E9-23 (ETHW) or N37-3 (F+) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK TERMINAL VOLTAGE (NPSW)

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

*a

Component with harness connected

(ECM)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

E11-22 (NPSW) - E9-23 (ETHW)

Ignition switch ON, shift lever in neutral

2.7 to 4.3 V

Ignition switch ON, shift lever in any position other than neutral

0.7 to 1.9 V

OK

REPLACE ECM

NG

5.

REPLACE NEUTRAL POSITION SWITCH

(a) Replace the neutral position switch.

Click here

NEXT

6.

READ VALUE USING TECHSTREAM (NEUTRAL SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Neutral Switch.

(e) Read the value when the shift lever is in neutral and any other position

OK:

Tester Display

Condition

Normal Condition

Neutral Switch

Shift lever is in neutral

ON

Shift lever is in any position other than neutral

OFF

OK

END

NG

REPLACE ECM

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