Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Clutch Switch Circuit

DESCRIPTION

Clutch switch circuit inspection is necessary for manual transmission vehicles.

When the clutch pedal is released, the ECM receives the positive (+) battery voltage through the ECU-IG NO. 2 fuse and ignition switch. While the clutch pedal is depressed, the clutch switch assembly sends a signal to terminal D of the ECM. The ECM cancels cruise control when terminal D receives the signal (voltage of below 1 V).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (ECM - BATTERY)

(a) Disconnect the ECM connector.

*a

Front view of wire harness connector

(to ECM)

(b) Turn the ignition switch to the ON position.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

E12-27 (D) - Body ground

Clutch pedal depressed

Below 1 V

E12-27 (D) - Body ground

Clutch pedal released

11 to 14 V

(d) Reconnect the ECM connector.

Proceed to

OK

NG

OK

PROCEED TO PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT CLUTCH SWITCH ASSEMBLY

(a) Remove the clutch switch assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C14-1 - C14-2

Switch pin free

10 kΩ or higher

C14-1 - C14-2

Switch pin pushed in

Below 1 Ω

(c) Reinstall the clutch switch.

Proceed to

OK

NG

NG

REPLACE CLUTCH SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (CLUTCH SWITCH ASSEMBLY - ECM)

(a) Disconnect the E12 ECM connector.

(b) Disconnect the C14 clutch switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C14-2 - Body ground

Always

10 kΩ or higher

C14-2 - E12-27 (D)

Always

Below 1 Ω

(d) Reconnect the clutch switch connector.

(e) Reconnect the ECM connector.

Proceed to

OK

NG

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH SWITCH ASSEMBLY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH SWITCH ASSEMBLY - ECM)

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