Crawl Indicator Light Does Not Come On

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Crawl Indicator Light does not Come ON
- 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 side 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





INSPECTION PROCEDURE

NOTICE:
When replacing the master cylinder solenoid, perform calibration Programming and Relearning.

PROCEDURE

1. CHECK CAN COMMUNICATION LINE ABS Warning Light Remains ON

NG -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK FOR DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Vehicle Stability Control System
A -- Continue to next step.

3. READ VALUE USING TECHSTREAM (CRAWL CONTROL SWITCH)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

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

D-SEAT SW





OK:

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

NG -- CHECK HARNESS AND CONNECTOR (CRAWL CONTROL SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (CRAWL CONTROL LIGHT)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

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

ABS/VSC/TRAC





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

ABS/VSC/TRAC





Result





B -- REPLACE MASTER CYLINDER SOLENOID Disassembly

A -- GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How To Proceed With Troubleshooting

5. CHECK HARNESS AND CONNECTOR (CRAWL CONTROL SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU) C1379

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. INSPECT CRAWL CONTROL SWITCH (COMBINATION SWITCH) C1379

NG -- REPLACE COMBINATION SWITCH ASSEMBLY Removal

OK -- REPLACE DRIVING SUPPORT SWITCH CONTROL ECU Removal