Toyota 4Runner: Crawl Indicator Light does not Come ON

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Crawl Indicator Light does not Come ON

DESCRIPTION

If any of the following conditions are met, the crawl indicator light blinks and crawl control is stopped.

Crawl control is operated when the vehicle stability control system is malfunctioning, or a vehicle stability control system malfunction occurs during crawl control.
The transfer is shifted to H4 during crawl control.
The shift lever is moved to P or N during crawl control.
The driver door is opened during crawl control.

When the vehicle is driven at 25 km/h (16 mph) or more during crawl control, control is temporarily stopped and the crawl indicator light blinks.

When using crawl control continually for a long period of time, if the temperature inside the hydraulic brake booster becomes too high, the crawl indicator light will turn off after blinking. After a while, the temperature decreases and crawl control becomes operable.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the master cylinder solenoid, perform calibration (See page ).

PROCEDURE

1.	CHECK CAN COMMUNICATION LINE

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(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:

CAN Bus Check indicates no malfunctions in CAN communication.

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

2.	CHECK FOR DTC

(a) Check for DTCs (See page ).

Result

Result	Proceed to
DTC is not output	A
DTC is output	B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

3.	READ VALUE USING TECHSTREAM (CRAWL CONTROL MAIN SWITCH)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / D-SEAT SW / Data List.

D-SEAT SW

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Crawl Control Main Switch	Crawl control switch/ ON or OFF	ON: Crawl switch on OFF: Crawl switch off	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Crawl Control Main Switch

Crawl control switch/ ON or OFF

ON: Crawl switch on

OFF: Crawl switch off

OK:

The Techstream displays ON or OFF according to crawl control switch operation.

GO TO STEP 5

4.	READ VALUE USING TECHSTREAM (CRAWL CONTROL LIGHT)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

ABS/VSC/TRAC

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Crawl Control Light	Crawl control indicator light/ ON or OFF	ON: Indicator light on OFF: Indicator light off	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Crawl Control Light

Crawl control indicator light/ ON or OFF

ON: Indicator light on

OFF: Indicator light off

(f) When performing the Crawl Control Light Active Test, check Crawl Control Light in the Data List (See page ).

ABS/VSC/TRAC

Tester Display	Test Part	Control Range	Diagnostic Note
Crawl Control Light	Crawl control indicator light	Indicator light ON/OFF	Observe the combination meter.

Result

Result		Proceed to
Data List Display	Data List Display when Performing Active Test ON/OFF Operation	Proceed to
ON	Does not change between ON and OFF	A
ON	Changes between ON and OFF	B
OFF	Does not change between ON and OFF	A
OFF	Changes between ON and OFF	B

REPLACE MASTER CYLINDER SOLENOID

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

5.	CHECK TERMINAL VOLTAGE AND RESISTANCE (IG, +B, GND)

REPLACE DRIVE MONITOR SWITCH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Crawl Indicator Light Remains ON

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