Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Cruise Control Switch Circuit

DESCRIPTION

This circuit sends signals to the ECM depending on the cruise control main switch condition.

The battery supplies the positive (+) battery voltage to the cruise control main switch. Then terminal CCS of the ECM receives the voltage as the signal according to the switch condition.

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

INSPECT CRUISE CONTROL MAIN SWITCH

(a) Remove the cruise control main switch (See page ).

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

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - 3

+ (ACCEL)/RES (RESUME)

235 to 245 Ω

1 - 3

- (COAST)/SET

617 to 643 Ω

1 - 3

CANCEL

1,509 to 1,571 Ω

1 - 3

Main Switch OFF

10 kΩ or higher

1 - 3

Main Switch ON

Below 1 Ω

(c) Reinstall the cruise control main switch.

NG

REPLACE CRUISE CONTROL MAIN SWITCH

OK

2.

CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

(a) Disconnect the spiral cable with sensor sub-assembly side and main switch side connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (main switch side) - 3 (spiral cable with sensor sub-assembly side)

Always

Below 1 Ω

3 (main switch side) - 4 (spiral cable with sensor sub-assembly side)

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Spiral Cable with Sensor Sub-assembly)

*b

Front view of wire harness connector

(to Cruise Control Main Switch)

(c) Reconnect the spiral cable with sensor sub-assembly side and main switch side connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

NOTICE:

The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may prevent the airbag from deploying. Be sure to read the page shown in the brackets.

HINT:

  • Removal (See page Installation (See page  ). ).
  • Installation (See page ).
(a) Remove the spiral cable with sensor sub-assembly.

(a) Remove the spiral cable with sensor sub-assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (CCS) main switch side - S8-1 (CCS)

The spiral cable with sensor sub-assembly position is center

Below 1 Ω

The spiral cable with sensor sub-assembly position is 2.5 rotations to the left

The spiral cable with sensor sub-assembly position is 2.5 rotations to the right

4 (ECC) main switch side - S8-2 (ECC)

The spiral cable with sensor sub-assembly position is center

Below 1 Ω

The spiral cable with sensor sub-assembly position is 2.5 rotations to the left

The spiral cable with sensor sub-assembly position is 2.5 rotations to the right

Text in Illustration

*a

Component without harness connected

(Spiral Cable with Sensor Sub-assembly)

*b

Cruise Control Main Switch Side

(c) Reinstall the spiral cable with sensor sub-assembly.

NG

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM AND BODY GROUND)

(a) Disconnect the E13 ECM connector.

(b) Disconnect the S8 spiral cable with sensor sub-assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

S8-2 (ECC) - Body Ground

Always

Below 1 Ω

Standard Resistance:

Tester Connection

Condition

Specified Condition

E13-17 (CCS) - S8-1 (CCS)

Always

Below 1 Ω

E13-17 (CCS) - Body ground

Always

10 kΩ or higher

(d) Reconnect the ECM connector.

(e) Reconnect the spiral cable with sensor sub-assembly connector.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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