Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Clutch Switch Circuit

DESCRIPTION

While depressing the clutch pedal, the clutch start switch assembly sends a signal to terminal MTN of the 4 wheel drive control ECU. While the signal is input, switching between H4 and L4 is possible.

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (CLUTCH SWITCH)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the Techstream on.

(d) Turn the ignition switch to ON.

(e) Enter the following menus: Powertrain / Four Wheel Drive / Data List.

(f) According to the display on the Techstream, read the Data List.

Four Wheel Drive

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Clutch SW

Clutch start switch status/

ON or OFF

ON: Clutch pedal depressed

OFF: Clutch pedal released

Used only for vehicles with a manual transmission.

Displays OFF for vehicles with an automatic transmission.

OK:

The display changes according to the clutch pedal operation.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK SFI SYSTEM

(a) Check that the SFI system operates normally.

  • for 2TR-FE: See page for 2GR-FKS: See page
  • for 2GR-FKS: See page

OK:

SFI system operates normally.

Result

Result

Proceed to

OK

A

NG (for 2TR-FE)

B

NG (for 2GR-FKS)

C

B

CHECK SFI SYSTEM

C

CHECK SFI SYSTEM

A

3.

CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - CLUTCH START SWITCH ASSEMBLY)

(a) Disconnect the F13 4 wheel drive control ECU connector.

(b) Disconnect the C8 clutch start switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F13-18 (MTN) - C8-1

Always

Below 1 Ω

F13-18 (MTN) or C8-1 - Body ground

Always

10 kΩ or higher

OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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