Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Crawl Indicator Light Remains ON

DESCRIPTION

When CRAWL starts after operating the CRAWL switch (drive monitor switch), the CRAWL indicator light turns on. While CRAWL is in the process of stopping, the CRAWL indicator light begins blinking. When CRAWL totally stops, the CRAWL indicator light turns off.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ). Inspect the fuses for circuits related to this system before performing ).
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (See page OK: OK: ).

OK:

CAN Bus Check indicates no malfunctions in CAN communication.

NG

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

OK

2.

INSPECT SKID CONTROL ECU (TRS TERMINAL)

(a) Disconnect the S1 skid control ECU (master cylinder solenoid) connector.

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

S1-43 (TRS) - Body ground

CRAWL switch not pushed in

10 kΩ or higher

CRAWL switch pushed in

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Skid Control ECU (Master Cylinder Solenoid))

(c) Reconnect the S1 skid control ECU (master cylinder solenoid) connector.

NG

GO TO STEP 4

OK

3.

READ VALUE USING TECHSTREAM (CRAWL CONTROL LIGHT)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

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

ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Crawl Control Light

Crawl indicator light/ ON or OFF

ON: Indicator light on

OFF: Indicator light off

-

(g) Check the Techstream display condition of the brake warning light.

Result

Result

Proceed to

Display of the Data List remains OFF

A

Display of the Data List remains ON

B

A

GO TO METER / GAUGE SYSTEM

B

REPLACE MASTER CYLINDER SOLENOID

4.

INSPECT DRIVE MONITOR SWITCH

(a) Remove the crawl control switch (drive monitor switch) (See page (b) Inspect the crawl control switch (drive monitor switch) (See page ).

(b) Inspect the crawl control switch (drive monitor switch) (See page ).

NG

REPLACE DRIVE MONITOR SWITCH

OK

5.

INSPECT ROOF CONSOLE BOX ASSEMBLY

(a) Remove the roof console box assembly.

  • for Double Cab: (See page ) for Access Cab: (See page )
  • for Access Cab: (See page ) )
Text in Illustration

*a

Component without harness connected

(Roof Console Box Assembly)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R44-1 (SWI3) - 2

Always

Below 1 Ω

R44-3 (DN) - 7

Always

Below 1 Ω

R44-4 (ECU) - 6

Always

Below 1 Ω

R44-5 (UP) - 3

Always

Below 1 Ω

R44-12 (GND) - 5

Always

Below 1 Ω

Result

Result

Proceed to

OK

A

NG (for Double Cab)

B

NG (for Access Cab)

C

A

REPAIR OR REPLACE HARNESS OR CONNECTOR (MASTER CYLINDER SOLENOID - ROOF CONSOLE BOX ASSEMBLY)

B

REPLACE ROOF CONSOLE BOX ASSEMBLY

C

REPLACE ROOF CONSOLE BOX ASSEMBLY

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