How to Troubleshoot the VSA System
System Indicator
This system has seven indicators on the gauge control module. NOTE: For locations of each indicator, refer to gauge control module component location index. When the system is OK, each indicator comes on for about 2 seconds after turning the vehicle to the ON mode, then it goes off. When the system detects a problem, a DTC will set and depending upon the failure, the VSA modulator-control unit determines which indicator(s) will turn on. If the problem goes away (system returns to normal), the indicator(s) will be controlled in the following way depending upon the DTC that was set:
ABS Indicator
The ABS indicator comes on when the ABS function is lost. The brakes will still work like a conventional system. Brake System Indicator (Red)
The brake system indicator (red) will come on when:
Brake System Indicator (Amber)
The brake system indicator (amber) comes on, when the brake control system is lost. VSA Indicator
The VSA indicator comes on when the VSA function is lost. The VSA indicator blinks when the VSA function is activating. VSA OFF Indicator
The VSA OFF indicator comes on when the VSA is turned OFF by using the VSA OFF switch. Automatic Brake Hold System Indicator
The automatic brake hold system indicator comes on when the automatic brake hold system is turned ON by using the automatic brake hold switch. Automatic Brake Hold Indicator
The automatic brake hold indicator comes on when the automatic brake hold function is activating. Diagnostic Trouble Code (DTC)
Self-Diagnosis
Kickback
The pump motor operates when the VSA modulator-control unit is functioning, and the fluid in the modulator is forced out to the master cylinder, causing kickback at the brake pedal. Pump Motor
Hydraulic Boost Failure Compensation
This vehicle is equipped with an electric brake booster system. This electric brake booster system uses the VSA modulator-control unit's pressurization control to provide additional brake assist. This is necessary when the electric brake booster system is lost. The hydraulic boost failure compensation can be heard when operating and some kickback will be felt on the brake pedal. The hydraulic boost failure compensation may also be activated in some high altitude conditions. These are considered normal characteristics of this system. Brake Fluid Replacement/Air Bleeding
How to Troubleshoot DTCs
The troubleshooting procedures assume that the cause of the problem is still present and the ABS, VSA, brake system indicator (red), and/or brake system indicator (amber) are still on. Following a troubleshooting procedure for a DTC that has been cleared but does not reset can result in incorrect diagnosis.
Intermittent Failures
The term ‘‘intermittent failure’’ means a system may have had a failure, but it checks OK now. If you cannot reproduce the condition, check for loose connections and terminals. Also check ground and power connections related to the circuit that you are troubleshooting. How to Use the HDS (Honda Diagnostic System)
NOTE: Make sure the 12 volt battery is in good condition and fully charged.
NOTE:
How to Retrieve DTCs
How to Clear DTCs
|