Vehicle Stability Control System (For Hydraulic Brake Booster) Crawl Indicator Light Does Not Come On

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION LINE

CHECK FOR DTC

READ VALUE USING GTS (CRAWL CONTROL MAIN SWITCH AND DIAL SWITCH SIGNAL)

PERFORM ACTIVE TEST USING GTS (CRAWL CONTROL LIGHT)

CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)

INSPECT CENTER CLUSTER MODULE SWITCH

DESCRIPTION

1. Crawl control is operated when the vehicle stability control system is malfunctioning, or a vehicle stability control system malfunction occurs during crawl control.
   

1. The transfer is shifted to H4 during crawl control.
   
2. The shift lever is moved to P or N during crawl control.
   
3. The driver side door is opened during crawl control.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (LandCruiser RM00000452J00ZX.html).

1. Turn the ignition switch off.
   

2. Connect the intelligent tester to the DLC3.
   

3. Turn the ignition switch to ON.
   

4. Turn the intelligent tester on.
   

5. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (for LHD: LandCruiser RM000000WIB0ECX.html, for RHD: LandCruiser RM000000WIB0EEX.html).
   

   OK:

   CAN Bus Check indicates no malfunctions in CAN communication.
   

   Result

   Result	Proceed to
   OK	A
   NG (for LHD)	B
   NG (for RHD)	C

1. Check for DTCs (LandCruiser RM0000046KV016X.html).
   

   Result

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

1. Turn the ignition switch off.
   

2. Connect the GTS to the DLC3.
   

3. Turn the ignition switch to ON.
   

4. Turn the GTS on.
   

5. Enter the following menus: Body Electrical / D-SEAT SW / Data List.
   

6. Check the Data List for proper functioning of the crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch).
   
   

   D-SEAT SW

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Crawl Control Main Switch	Crawl on/off switch/ ON or OFF	ON: Switch on OFF: Switch off	-
   Dial Switch Signal 1	Crawl speed selector/Multi-terrain select road mode selector signal 1/ ON or OFF	Switches between ON and OFF according to the ON/OFF Combination Chart below.	-
   Dial Switch Signal 2	Crawl speed selector/Multi-terrain select road mode selector signal 2/ ON or OFF		-
   Dial Switch Signal 3	Crawl speed selector/Multi-terrain select road mode selector signal 3/ ON or OFF		-

   
   
   

   1. Operate the crawl speed selector/multi-terrain select road mode selector and check that "Dial Switch Signal 1", "Dial Switch Signal 2" and "Dial Switch Signal 3" in the Data List display ON and OFF according to the chart shown below.
      

      Text in Illustration

      *1	Center Cluster Module Switch
      *2	Crawl On/Off Switch
      *3	Multi-terrain Select Switch
      *4	Crawl Speed Selector/Multi-terrain Select Road Mode Selector
      *a	Low/MUD & SAND
      *b	Medium-low/LOOSE ROCK
      *c	Medium/MOGUL
      *d	Medium-high/ROCK & DIRT
      *e	High/ROCK

      
      

      ON/OFF Combination Chart for "Dial Switch Signal 1", "Dial Switch Signal 2" and "Dial Switch Signal 3"

      Crawl Speed Selector Position/Multi-terrain Select Road Mode Selector Position		Low/MUD & SAND	Medium-low/LOOSE ROCK	Medium/MOGUL	Medium-high/ROCK & DIRT	High/ROCK
      Data List Display	Dial Switch Signal 1	ON	ON	OFF	OFF	OFF
      	Dial Switch Signal 2	ON	OFF	OFF	OFF	ON
      	Dial Switch Signal 3	OFF	OFF	OFF	ON	ON

      OK:

      The GTS display changes according to crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch) operation.
      

1. Turn the ignition switch off.
   

2. Connect the GTS to the DLC3.
   

3. Turn the ignition switch to ON.
   

4. Turn the GTS on.
   

5. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.
   
   

   ABS/VSC/TRC

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

6. When performing the Crawl Control Light Active Test, check Crawl Control Light in the Data List (LandCruiser RM000001DWY02VX.html).
   
   

   ABS/VSC/TRC

   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	-

   
   

   Result

   Result		Proceed to
   Data List Display	Data List Display when Performing Active Test ON/OFF Operation
   ON	Changes between ON and OFF	A
   	Does not change between ON and OFF (for LHD)	B
   	Does not change between ON and OFF (for RHD)	C
   OFF	Changes between ON and OFF	A
   	Does not change between ON and OFF (for LHD)	B
   	Does not change between ON and OFF (for RHD)	C

1. Disconnect the G156 center cluster module switch connector.
   

2. Disconnect the G162 driving support switch control ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   G162-6 (CRWL) - G156-21 (FRB)	Always	Below 1 Ω
   G162-4 (MOD1) - G156-17 (ECU)	Always	Below 1 Ω
   G162-11 (MOD3) - G156-19 (DN)	Always	Below 1 Ω
   G162-2 (MOD2) - G156-18 (UP)	Always	Below 1 Ω
   G156-24 (E) - Body ground	Always	Below 1 Ω
   G162-6 (CRWL) or G156-21 (FRB) - Body ground	Always	10 kΩ or higher
   G162-4 (MOD1) or G156-17 (ECU) - Body ground	Always	10 kΩ or higher
   G162-11 (MOD3) or G156-19 (DN) - Body ground	Always	10 kΩ or higher
   G162-2 (MOD2) or G156-18 (UP) - Body ground	Always	10 kΩ or higher

1. Remove the center cluster module switch (LandCruiser RM000003C4A01HX.html).
   

2. Inspect the crawl on/off switch (center cluster module switch) and crawl speed selector (center cluster module switch) (LandCruiser RM000003C4B017X.html).