Honda Accord: VSA Modulator-Control Unit Update - VSA System Components - Brakes - Honda Accord MK8 2008-2012 Service ManualHonda Accord: VSA Modulator-Control Unit Update

Special Tools Required

- Honda diagnostic system (HDS) tablet tester

- Honda interface module (HIM) and an iN workstation with the latest HDS software version

- HDS pocket tester

- GNA-600 and an IN workstation with the latest HDS software version

Any one of the above updating tools can be used.

NOTE: - Use this procedure when you need to update the VSA modulator-control unit at anytime.

- Make sure the HDS/iN workstation has the latest HDS software version.

- Before you update the VSA modulator-control unit, make sure the battery in the vehicle is fully charged, and connect a jumper battery (not a battery charger) to maintain system voltage.

- Never turn the ignition switch to LOCK (0) or ACC (I) during the update. If there is a problem with the update, leave the ignition switch ON (II).

- To prevent VSA modulator-control unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, door locks, etc.) during the update.

- To ensure the latest program is installed, do a VSA modulator-control unit update whenever the VSA modulator-control unit is substituted or replaced.

- You cannot update a VSA modulator-control unit with a program it already has. It will only accept a new program.

- High temperature in the engine compartment might cause the VSA modulator-control unit to become too hot to run the update. If the engine has been running before this procedure, open the hood and cool the engine compartment.

- If you need to diagnose the Honda interface module (HIM) because the HIM's red (#3) light came on or was flashing during the update, leave the ignition switch ON (II) when you disconnect the HIM from the data link connector (DLC). This will prevent VSA modulatorcontrol unit damage.

- DTCs stored in memory are cleared when the VSA modulator-control unit is updated.

1. Turn the ignition switch to ON (II), but do not start the engine.

2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

3. Make sure the HDS communicates with the vehicle


3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn't, troubleshooting the DLC circuit (see page 11-181).

4. Select the update mode, and follow the screen prompts to update the VSA modulator-control unit.

5. If the software in the VSA modulator-control unit is the latest, disconnect the HDS/HIM/GNA600 from the DLC. If the software in the VSA modulator-control unit is not the latest, follow the instructions on the screen.

6. Do the VSA sensor neutral position memorization procedure (see page 19-133).

    VSA Off Switch Test
    1. Turn the ignition switch to LOCK (0). 2. Remove the driver's dashboard lower cover {see page 20-166). 3. Push out the VSA OFF switch (A) from the driver's dashboard lower cover. 4. Check ...

    VSA Modulator-Control Unit Removal and Installation
    N O T E : - Do not spill brake fluid on the vehicle; it may damage the paint. If brake fluid gets on the paint, wash it off immediately with water. - Be careful not to damage or deform the brake ...

    See also:

    Symptom Troubleshooting Index
    ...

    Power Window Master Switch Input Test
    NOTE: Before testing, troubleshoot the multiplex Integrated control unit first, using B-CAN System Diagnosis Test Mode A (see page 22-134). 1. Turn the ignition switch to LOCK (0), open and clos ...

    Compass Calibration
    The compass may need to be manually calibrated after exposure to a strong magnetic field. If the compass seems to be continually showing the wrong direction and is not self-calibrating, or ...