VSA System Symptom Troubleshooting Index (VSA System)

When the vehicle has one of these symptoms, check for VSA diagnostic trouble codes (DTCs) with the HDS. If there are no DTCs, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

Symptom	Diagnostic procedure	Also check for
HDS does not communicate with the VSA modulator-control unit or the vehicle	Troubleshoot the DLC circuit - Refer to: Network Communications Symptom Troubleshooting - F-CAN BUS-OFF (CAN BUS without Connection to CAN Gateway) (3.0L Engine) or Network Communications Symptom Troubleshooting - HDS does not communicate with the vehicle or Network Communications Symptom Troubleshooting - F-CAN Lost Communication (CAN BUS with Connection to CAN Gateway) or Network Communications Symptom Troubleshooting - F-CAN BUS-OFF (CAN BUS without Connection to CAN Gateway) or Network Communications Symptom Troubleshooting - F-CAN Lost Communication (CAN BUS without Connection to CAN Gateway) or Network Communications Symptom Troubleshooting - F-CAN Lost Communication (CAN BUS with Connection to CAN Gateway) (3.0L Engine) or Network Communications Symptom Troubleshooting - B-CAN Lost Communication .
ABS indicator, brake system indicator (red), VSA indicator, brake system indicator (amber), or VSA OFF indicator does not come on at start-up (bulb check)	Do the gauge control module self-diagnostic function . Replace the VSA modulator-control unit .
VSA cannot be turned OFF	Symptom troubleshooting . Replace the VSA modulator-control unit .
VSA OFF indicator does not go off	Do the VSA sensor neutral position memorization - Refer to: VSA Modulator-Control Unit Update or VSA Sensor Neutral Position Memorization . Do the gauge control module self-diagnostic function .
ABS indicator, brake system indicator (red), VSA indicator, and brake system indicator (amber) do not go off	NOTE: If any of the CAN communication failure DTC is indicated in other system, troubleshoot the DTC first. Check for open wire or shorted wire in the F-CAN circuit; - Between the gauge control module and the CAN gateway (IF-CAN_H, IF-CAN_L) - Between the VSA modulator-control unit and the CAN gateway (VF-CAN A_H, VF-CAN A_L) Check the VSA modulator-control unit power circuit (+B_ABS/VSA_FRS, IG1_VSA/ABS) Check the VSA modulator-control unit ground circuit (GND) Do the gauge control module self-diagnostic function .	Refer to the followings about the indicator operating condition; How to Troubleshoot Information Refer to the followings about the circuit troubleshooting; Gauge control module connector for inputs and outputs VSA modulator-control unit connector for inputs and outputs VSA modulator-control unit system circuit diagram Fuse to components index Ground to components index