VEHICLE STABILITY CONTROL SYSTEM

SST
	09843-18040	Diagnosis Check Wire No. 2

PRECAUTION FOR DISCONNECTING CABLE FROMNEGATIVE BATTERY TERMINAL

Note

When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected:

System	See Procedure
Simple Intelligent Parking Assist System	Click here
Power Door Lock Control System
Stop and Start System

IGNITION SWITCH EXPRESSION

Tech Tips

The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.

Expression	Ignition Switch (Position)	Engine Switch (Condition)
Ignition Switch off	LOCK	Off (Lock)
Ignition Switch ACC	ACC	On (ACC)
Ignition Switch ON	ON	On (IG)
Engine Start	START	On (Start)

TROUBLESHOOTING PRECAUTION

When there is a malfunction with terminal contact points or part installation problems, removal and installation of the suspected parts may return the system to normal either completely or temporarily.
In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as DTC output and Freeze Frame Data, and record it before disconnecting any connector or removing and installing parts.
Since the system may be influenced by malfunctions in systems other than the VSC system, be sure to check for DTCs in other systems.

HANDLING PRECAUTION

Do not remove or install VSC parts such as the steering angle sensor or yaw rate and acceleration sensor (airbag sensor assembly) except when required, as they need to be adjusted correctly after removal and installation.
Be sure to perform preparation before work and confirmation after work is completed by following the directions in the repair manual when working on the VSC system.
Be sure to remove and install the skid control ECU (brake actuator assembly), sensors, etc. with the ignition switch off unless it is otherwise specified in the inspection procedure.
If the skid control ECU (brake actuator assembly) or a sensor has been removed and installed, it is necessary to check the system for problems after the parts have been reassembled. Check for DTCs using the GTS. Also check that the system functions and signals received by the ECU are normal using Test Mode.

DTC PRECAUTION

Warnings for some DTCs cannot be cleared only by repairing the malfunctioning parts. If the warning is displayed after repair work, the DTC should be cleared after turning the ignition switch off.

Note

If a DTC for a malfunctioning part reappears after it was cleared, then it has been stored again.
When 2 or more DTCs are detected, perform diagnosis for each DTC, one by one until the problem is identified.

CHASSIS DYNAMOMETER PRECAUTION

When testing with a 2-wheel drum tester such as speedometer tester, combination tester for the speedometer and brakes, or chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and disable the TRC and VSC systems.

Tech Tips

If Inspection Mode is not used, the vehicle may unexpectedly move off the dynamometer because of TRC and VSC operation.
The VSC OFF switch must not be used to disable TRC and VSC operation when the vehicle is to be operated on a dynamometer. Pressing the VSC OFF switch does not disable TRC and VSC operation completely.

Note

Secure the vehicle with lock chains for safety.

Activating Inspection Mode (When Using the GTS)
1. Ensure that the ignition switch is off and the engine is stopped.
2. for Continuously Variable Transaxle:
  
  Make sure that the shift lever is in P.
3. for Manual Transaxle:
  
  Make sure that the shift lever is in neutral.
4. for Multi-Mode Manual Transaxle:
  
  Make sure that the shift lever is in N.
5. Connect the GTS to the DLC3.
6. Start the engine.
7. Turn the GTS on.
8. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Inspection Mode.
9. Check that the VSC OFF and TRC OFF indicator lights come on.
  Tech Tips
  - If the VSC OFF and TRC OFF indicator lights do not come on, repeat the steps.
  - Turning the ignition switch off ends Inspection Mode.
Activating Inspection Mode (When Using the SST Check Wire)

Tech Tips

Perform steps "C" to "H" within 30 seconds.
1. Ensure that the ignition switch is off and the engine is stopped (Step "A").
2. for Continuously Variable Transaxle:
  
  Make sure that the shift lever is in P (Step "B").
3. for Manual Transaxle:
  
  Make sure that the shift lever is in neutral (Step "B").
4. for Multi-Mode Manual Transaxle:
  
  Make sure that the shift lever is in N (Step "B").
5. Start the engine (Step "C").
6. Apply the parking brake (Step "D").
7. Depress and release the brake pedal twice (Step "E").
8. While holding the brake pedal down, release and apply the parking brake twice (Step "F").
9. With the parking brake applied, depress and release the brake pedal twice (Step "G").
10. Check that the VSC OFF and TRC OFF indicator lights come on (Step "H").
  Tech Tips
  - If the VSC OFF and TRC OFF indicator lights do not come on in step "H", repeat steps "A" to "H".
  - Turning the ignition switch off ends Inspection Mode.

CAN COMMUNICATION SYSTEM PRECAUTION

The CAN communication system is used for communication between the skid control ECU (brake actuator assembly), steering angle sensor, yaw rate and acceleration sensor (airbag sensor assembly) and other ECUs. If there is trouble in the CAN communication line, corresponding DTCs in the communication line are output.
If any CAN communication DTCs are output, repair the malfunction, then troubleshoot the VSC system while communication is normal.
In order to enable CAN communication, a specific type of wiring is used for the CAN communication lines. The wiring used for each communication line is a twisted pair of wires that have an equal length. A bypass wire should not be used because the data being transmitted will be corrupted.