Vsa System Components: Other Honda Insight ZE2 рестайлинг

System Indicator

This system has five indicators

Scheme 42

1. ABS indicator (A)
2. Brake system indicator (red) (B)
3. VSA indicator (C)
4. VSA OFF indicator (D)
5. Brake system indicator (amber) (E)

When the system is OK, each indicator comes on for about 2 seconds after turning the ignition switch to ON (II), then 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

1. The indicator(s) will come on and stay on when the ignition switch is ON (II).
2. The indicator(s) will automatically go off.
3. The indicator(s) will go off after the vehicle is driven.

ABS Indicator

The ABS indicator comes on when the ABS function is lost. The brakes still work like a conventional system.

Brake System Indicator (Red)

The brake system indicator (red) comes on when the EBD (electronic brake distribution) function is lost, the parking brake is applied, and/or the brake fluid level is low.

Note. If two or more wheel speed sensors fail, the brake system indicator (red) will come on.

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.

Brake System Indicator (Amber)

The brake system indicator (amber) comes on, when the CAS (Creep Aid System) function is lost.

Kickback

The pump motor operates when the VSA modulator-control unit is functioning, and the fluid in the reservoir is forced out to the master cylinder, causing kickback at the brake pedal.

Pump Motor

1. The pump motor operates when the VSA modulator-control unit is functioning.
2. The VSA modulator-control unit checks the pump motor operation during the first acceleration after the vehicle starts driving.

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 Retrieve DTCs

1. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it does not, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(ref-513153-S33429882062012110700000) ).
4. Follow the prompts on the HDS to display the DTC(s) on the screen. After determining the DTC, refer to the «DTC TROUBLESHOOTING»(ref-513191-S03425435242012110700000) .
5. Turn the ignition switch to LOCK (0).

How to Clear DTCs

1. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it does not, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(ref-513153-S33429882062012110700000) ).
4. Clear the DTC(s) by following the screen prompts on the HDS.
5. Turn the ignition switch to LOCK (0).

System Outline

This system is composed of the VSA modulator-control unit, the wheel speed sensors, the steering angle sensor, the yaw rate-acceleration sensor, and the system indicators in the gauge control module. The VSA modulator-control unit controls the Anti-Lock Brake System (ABS), the Electronic Brake Distribution (EBD), the Traction Control System (TCS), the Vehicle Stability Assist (VSA), the Creep Aid System (CAS), the Hill Start Assist (HSA), and brake assist with the brake pressure of each wheel and reduces engine torque.

Scheme 43

Anti-lock Control

Without ABS, when the brake pedal is pressed while driving, the wheels sometimes lock before the vehicle comes to a stop. In such an event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is reduced if the rear wheels are locked, creating an extremely unstable condition. With ABS, the system precisely controls the slip rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures maneuverability and stability of the vehicle. The ABS calculates the slip rate of the wheels based on the four wheel speeds, and then it controls the brake fluid pressure to reach the target slip rate.

Grip force of tire and road surface

Scheme 44

Main Control

The control unit detects the wheel speed based on the wheel speed sensor signals it receives, then it calculates the vehicle speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration based on the wheel speeds.

The control unit calculates the slip rate of each wheel, and transmits the control signal to the modulator unit solenoid valve when the slip rate is high.

The hydraulic control has three modes: Pressure retaining, pressure reducing, and pressure intensifying.

Scheme 45

EBD (Electronic Brake Distribution) Features

The EBD feature helps control vehicle braking by adjusting the rear brake force in accordance with the rear wheel load before the ABS operates, Based on the wheel speed sensor signals, the control unit uses the modulator to control the rear brakes individually. When the rear wheel speed is less than the front wheel speed, the VSA modulator-control unit retains the current rear brake fluid pressure by closing the inlet valve in the modulator. As the rear wheel speed increases and approaches the front wheel speed, the VSA modulator-control unit increases the rear brake fluid pressure by momentarily opening the inlet valve. This whole process is repeated very rapidly. While this is happening, kickback may be felt at the brake pedal, you may also hear a muted buzzing sound from the VSA modulator-control unit. This is normal.

Scheme 46

TCS (Traction Control System) Features

When a drive wheel loses traction on a slippery road surface and starts to spin, the VSA modulator-control unit applies brake pressure to the spinning wheel and sends an engine torque control request to the PCM to slow the spinning wheel and keep traction.

Scheme 47

Oversteer control

Applies the brake to the front and rear outside wheels

Scheme 48

Scheme 49

1. Applies the brake to the front and rear inside wheels
2. Controls the engine torque when accelerating

Brake Assist Features

Brake assist helps ensure that any driver can achieve the full braking potential of the vehicle by increasing brake system pressure in a panic situation, bringing the vehicle into a full ABS stop.

If during a panic stop the VSA modulator-control unit determines that the brake system pressure increases above a threshold in less than a certain amount of time, the VSA modulator-control unit engages brake assist.

Because the brake system pressure crossed the pressure threshold before the time threshold had expired, the VSA modulator-control unit goes into brake assist mode.

Scheme 50

Creep Aid System (CAS) Features

This system prevents the vehicle from rolling forward or backward on a gentle hill during which the driver releases the brake pedal by controlling the brake pressure.

When the VSA modulator control unit receives a CAS activation request signal from the PCM, the system assists the driver to get the vehicle started by holding the brake pressure. This control is done not only on hills, but also on level roads. When the driver lifts their foot off the brake pedal to get the vehicle started, the brake switch is turned off, and then the brake pressure is held by operating the TCS valve and the ESV valve.

CAS may not be activated under the following conditions.

Scheme 51

1. When in N or P range.
2. When in a strong creep state (In R range, with low water temperature, etc.)
3. When the driver does not press the brake strongly enough upon stopping the vehicle, or when the driver releases the brake pedal gradually upon starting the vehicle.

Hill Start Assist (HSA) Features

Prevents the vehicle from rolling backwards when moving your foot from the brake pedal to the accelerator pedal while stopped on a steep hill. The control unit reads the angle of inclination from the yaw rate-acceleration sensor, and that all four wheels are stopped, then it calculates the amount of fluid pressure required to keep the vehicle from rolling backward when the control unit sees the brake pressure decrease as the driver lifts their foot off of the brake pedal, and moves their foot to the accelerator pedal. The HSA also works when the vehicle is stopped on a downhill slope.

Scheme 52

Modulator Unit

The modulator unit consists of the inlet solenoid valve, the outlet solenoid valve, the TCS NO (normally open) solenoid valve, the ESV NC (normally closed) solenoid valve, the reservoir, the pump, and the pump motor.

The hydraulic control has three modes of ABS action; pressure intensifying, pressure retaining, and pressure reducing. Pressure intensifying (VSA) mode is combined of the TCS, VSA, CAS, HSA and brake assist action.

The hydraulic circuit is an independent four channel type; one channel for each wheel.

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VSA cannot be turned OFF

Note. If the low tire pressure/TPMS indicator turns ON, the VSA cannot be turned OFF. Check the tire pressure first.

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1. Turn the ignition switch to LOCK (0).
2. Check the VSA OFF switch (see «VSA OFF SWITCH TEST/REPLACEMENT»(ref-513191-S36852338492012110700000) ). Is the VSA OFF switch OK? YES -Go to step 3. NO -Replace the VSA OFF switch (see «VSA OFF SWITCH TEST/REPLACEMENT»(ref-513191-S36852338492012110700000) ).
3. Disconnect the VSA OFF switch 5P connector (see step 3 ).
4. Disconnect the gauge control module 32P connector (see step 3 «GAUGE CONTROL MODULE REPLACEMENT»(ref-513176-S36002924502012110700000) ).
5. Check for continuity between gauge control module 32P connector terminal No. 26 and VSA OFF switch 5P connector terminal No. 2. Is there continuity? YES -Go to step 6. NO -Repair an open in the wire between the gauge control module and the VSA OFF switch.
6. Check for continuity between VSA OFF switch 5P connector terminal No. 2 and body ground. Is there continuity? YES -Repair a short to body ground in the wire between the gauge control module and the VSA OFF switch. NO -Go to step 7.
7. Check for continuity between VSA OFF switch 5P connector terminal No. 1 and body ground. Is there continuity? YES -Replace the original gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-513176-S36002924502012110700000) ). NO -Repair an open in the wire between the VSA OFF switch and body ground (G501).

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1. Turn the ignition switch to LOCK (0).
2. Check the No. 11 (7.5 A) fuse in the under-dash fuse/relay box. Is the fuse blown? YES -Replace the fuse. Turn the ignition switch to ON (II), then turn it to LOCK (0) again. If the fuse blows again, repair the short to ground on the No. 11 (7.5 A) fuse circuit. NO -Reinstall the checked fuse, then go to step 3.
3. Check the No. 37 (30 A) fuse in the under-dash fuse/relay box. Is the fuse blown? YES -Replace the fuse. Turn the ignition switch to ON (II), then turn it to LOCK (0) again. If the fuse blows again, repair the short to ground on the No. 37 (30 A) fuse circuit. NO -Reinstall the checked fuse, then go to step 4.
4. Do the gauge control module self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(ref-513176-S11328941922012110700000) ). If the gauge control module OK? YES -Go to step 5. NO -Replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-513176-S36002924502012110700000) ).
5. Turn the ignition switch to LOCK (0).
6. Disconnect the VSA modulator-control unit 47P connector (see step 2 ).
7. Turn the ignition switch to ON (II).
8. Measure the voltage between VSA modulator-control unit 47P connector terminal No. 8 and body ground. Is there battery voltage? YES -Go to step 9. NO -Repair an open in the wire between the No. 11 (7.5 A) fuse in the under-dash fuse/relay box and the VSA modulator-control unit.
9. Turn the ignition switch to LOCK (0).
10. Check for continuity between VSA modulator-control unit 47P connector terminal No. 16 and body ground. Is there continuity? YES -Go to step 11. NO -Repair an open in the wire between the VSA modulator-control unit and body ground (G203).
11. Measure the voltage between VSA modulator-control unit 47P connector terminal No. 32 and body ground. Is there battery voltage? YES -Go to step 12. NO -Repair an open in the wire between the No. 37 (30 A) fuse in the under-dash fuse/relay box and the VSA modulator-control unit.
12. Disconnect the gauge control module 32P connector. (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-513176-S36002924502012110700000) )
13. Check for continuity between the VSA modulator-control unit 47P connector terminal and gauge control module 32P connector terminal (see chart below). Sign VSA Modulator-control Unit 47P Connector Terminal Gauge Control Module 32P Connector Terminal CANL No. 13 No. 19 CANH No. 12 No. 20 Is there continuity? YES -Go to step 14. NO -Repair an open in the wire between the gauge control module and the VSA modulator-control unit.
14. Reconnect all connectors.
15. Update the VSA modulator-control unit if it does not have the latest software (see «VSA MODULATOR-CONTROL UNIT UPDATE»(ref-513191-S26443466162012110700000) ).
16. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
17. Check the ABS indicator, the brake system indicator (red), the VSA indicator, and the brake system indicator (amber) for several seconds when the ignition switch is turned to ON (II). Do the indicators come on then go off? YES -If the VSA modulator-control unit was updated, troubleshooting is complete. NO -Check for loose terminals in the VSA modulator-control unit 47P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(ref-513191-S13342410542012110700000) ).

VSA Sensor Neutral Position Memorization

Note. Do not press the brake pedal during this procedure.

Scheme 64

1. Park the vehicle on a flat and level surface, with the steering wheel in the straight ahead position.
2. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) (A) under the driver's side of the dashboard.
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it does not, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(ref-513153-S33429882062012110700000) ).
5. Select VSA ADJUSTMENT with the HDS, and follow the screen prompts. NOTE: See the HDS Help menu for specific instructions.
6. Turn the ignition switch to LOCK (0).

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1. Turn the ignition switch to LOCK (0).
2. Push out the VSA OFF switch (A) from the back of the instrument panel.
3. Disconnect the VSA OFF switch 5P connector (B).
4. On the switch side, check for continuity between the VSA OFF switch 5P connector terminal in each switch position according to the table. If the switch does not work as described in the table, replace the switch. If the switch tests OK, go to step 5.
5. On the switch side, check for continuity between VSA OFF switch 5P connector terminals No. 4 and No. 5. There should be continuity at all times.
6. If the continuity is not as specified, remove the cover (A), and replace the bulb (B).
7. Install the VSA OFF switch in the reverse order of removal.

VSA Modulator-Control Unit Update

Special Tools Required

1. Honda Diagnostic System (HDS) tablet tester
2. Honda Interface Module (HIM) and an iN workstation with the latest HDS software version
3. HDS pocket tester
4. GNA600 and an iN workstation with the latest HDS software version
5. MVCI unit with the latest control module (CM) update software installed

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 software version. Before you update the VSA modulator-control unit, make sure the 12 volt battery in the vehicle is fully charged, and connect a jumper to the 12 volt battery (not a battery charger) to maintain system voltage. Never turn the ignition switch to LOCK (0) or ACCESSORY (I) during the update. If there is a problem with the update, leave the ignition switch in 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 in ON (II) when you disconnect the HIM from the data link connector (DLC). This will prevent VSA modulator-control unit damage. DTCs stored in memory are cleared when the VSA modulator-control unit is updated.

Scheme 70

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 and the VSA modulator-control unit. If it does not, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(ref-513153-S33429882062012110700000) ).
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/GNA 600 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 «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(ref-513191-S35076284552012110700000) ).