Vsa (vehicle Stability Assist) System Acura RL II

Scheme 2

System Indicator

This system has four indicators: ABS indicator (A), VSA indicator (B), VSA activation indicator (C) and brake system indicator (D). When the system detects a problem, it illuminates the appropriate indicators. Depending on the failure, the control unit determines which indicators are turned on.

Scheme 3

1. When ABS function is lost: ABS indicator, VSA indicator, and VSA activation indicators turn on.
2. When VSA function is lost: VSA indicator and VSA activation indicators turn on.
3. When all functions are lost: All four indicators turn on.
4. When the gauge control module detects F-CAN circuit problem: VSA indicator and brake system indicators turn on.

ABS/VSA Indicator

1. If the system is OK, the ABS and VSA indicators will go off 2 seconds after turning the ignition switch ON (II).
2. The ABS and VSA indicators come on when the control unit detects a problem in the system. However, even though the system is operating properly, the activation indicator may come on under these conditions: One drive wheel is stuck. The vehicle goes into a spin. The ABS or VSA continues to operate for a long time. The vehicle is subjected to an electrical signal disturbance. The VSA switch has been manually turned off. When an abnormality in the TPMS (Tire Pressure Monitoring System) or low tire pressure is detected, VSA functions cannot be cancelled by pressing the VSA OFF switch.

To determine the actual cause of the problem, question the client about the problem, taking these conditions into consideration.

1. When a problem is detected and the ABS indicator and VSA indicator come on, there are cases when the indicator stays on until the ignition switch is turned OFF, and cases when the indicator goes off automatically when the system returns to normal. DTC 61 or 62: The ABS and VSA indicators go off automatically when the system returns to normal. DTC 11, 13, 15, 17, 31, 32, 33, 34, 35, 36, 37, 38, 53, 54, 71, 81, 112, 121, 122, 123 or 124: The ABS and VSA indicators stay on until the ignition switch is turned OFF whether or not the system returns to normal. DTC 12,14,16,18, 21, 22, 23, 24, 41, 42, 43, 44, 51 or 52: The ABS and VSA indicators stay on until the system returns to normal after the vehicle is driven. DTC 25, 26, 27, 28, 64, 65, 66, 68,83, 84 or 86: The VSA indicators stay on until the ignition switch is turned OFF whether or not the system returns to normal.

Diagnostic Trouble Code (DTC)

1. The memory can hold any number of DTCs. However, when the same DTC is detected more than once, the more recent DTC is written over the earlier one. Therefore, when the same problem is detected repeatedly, it is memorized as a single DTC.
2. The DTCs are indicated in ascending number order, not in the order they occur.
3. The DTCs are memorized in the EEPROM (non-volatile memory). Therefore, the memorized DTCs cannot be canceled by disconnecting the battery. Do the specified procedures to clear the DTCs.

Self-diagnosis

1. Self-diagnosis can be classified into two categories: Initial diagnosis: Done right after the ignition switch is turned ON (II) and until the ABS and VSA indicators go off. Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned OFF.
2. When the system detects a problem, the VSA modulator-control unit shifts to fail-safe mode.

Kickback

The pump motor operates when the ABS or VSA 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 ABS or VSA is functioning.
2. The VSA modulator-control unit checks the pump motor operation one time after completing initial diagnosis during initial diagnosis when the vehicle is driven over 10 mph (15 km/h). You may hear the motor operate at this time, but that is normal.

Brake Fluid Replacement/Air Bleeding

Brake fluid replacement and air bleeding procedures are identical to the procedures used on vehicles not equipped with VSA (see BRAKE SYSTEM BLEEDING ).

How to Troubleshoot DTCs

The troubleshooting flowchart procedures assume that the cause of the problem is still present and the ABS and/or VSA indicator are still on. Following the flowchart when the ABS and/or VSA indicators do not come on can result in incorrect diagnosis. The connector illustrations show the female terminal connectors with a single outline and the male terminal connectors with a double outline.

1. Question the client about the conditions when the problem occurred, and try to reproduce the same conditions for troubleshooting. Find out when the ABS and/or VSA indicators came on, such as during braking, accelerating, or turning, etc.
2. When the ABS and VSA indicators do not come on during the test-drive, but troubleshooting is done based on the DTC, check for loose connectors, poor contact of the terminals, etc. before you start troubleshooting.
3. After troubleshooting or repairs are done, clear the DTCs, and test-drive the vehicle under the same conditions that originally set the DTCs. Make sure the ABS and VSA indicators do not come on.
4. Check for DTCs from other control units which are connected via F-CAN. If there are DTCs that are related to F-CAN, the most likely cause was that the ignition switch was turned ON (II) with the VSA modulator-control unit connector disconnected. Clear the DTCs. Check for fuel and emissions, and VSA codes, first. Be sure to troubleshoot those first.

Intermittent Failures

The team "intermittent failure" means a system may have had a failure, but it checks OK now. If the indicator(s) of the system on the dash does not come on, check for poor connections or loose terminals at all connectors related to the circuit that you are troubleshooting. If the indicators were on but then went out, the original problem may have been intermittent.

Scheme 4

1. If the system indicators stay on, connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn't, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/testing-diagnostics/#pgm-fi-system) ).
4. Check the diagnostic trouble code (DTC) and note it. Also check the on-board snapshot data, and download any data found. Then refer to the indicated DTC's troubleshooting, and do the appropriate troubleshooting procedure. NOTE: The HDS can read the DTC, the current data, and other system data. For specific operations, refer to the Help menu that came with the HDS.

How to Retrieve DTCs

1. With the ignition switch OFF, connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn't, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/testing-diagnostics/#pgm-fi-system) ).
4. Follow the prompts on the HDS to display the DTC(s) on the screen. After determining the DTC, refer to the «DTC TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) .
5. Turn the ignition switch OFF.

How to Clear DTCs

1. With the ignition switch OFF, connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn't, troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/testing-diagnostics/#pgm-fi-system) ).
4. Clear the DTC(s) by following the screen prompts on the HDS.
5. Turn the ignition switch OFF.

DTC Troubleshooting Index

DTC TROUBLESHOOTING CHART

Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING CHART

Scheme 5

VOLTAGE CHART

VOLTAGE CHART

Scheme 6

VOLTAGE CHART

ABS Features

When the brake pedal is pressed while driving, the wheels can 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. The ABS 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 vehicle speed and the wheel speed, then it controls the brake fluid pressure to reach the target slip rate.

Grip Force of Tire and Road Surface

Scheme 7

TCS Features

The TCS provides low-speed traction. When a drive wheel loses traction on a slippery road surface and starts to spin, the VSA modulator-control unit applies brake pressure to slow the spinning wheel. At that time, the VSA modulator-control unit sends a traction control signal to the PCM to reduce engine power.

Scheme 8

Oversteer control

Applies the brakes to the front and rear outside wheels

Scheme 9

Scheme 10

1. Applies the brakes to the front and rear inside wheels
2. Controls the engine torque

Electronic Brake Distribution (EBD)

Electronic Brake Distribution (EBD) has been added to the VSA system. EBD eliminates the need for an external, mechanical proportioning valve and improves overall braking performance.

When the vehicle is heavily loaded, most of the increase in weight is born by the rear wheels, increasing braking capability. Proportioning valves maintain a fixed distribution of brake pressure between the front and the rear wheels, making it very difficult to fully utilize increased rear wheel braking capability. EBD varies brake pressure distribution according to load, using input from the wheel speed sensors, which improves overall braking performance.

Scheme 11

Normal Braking

Under normal braking conditions, brake pressure is evenly distributed between the front and rear brakes, and EBD is not used.

Firm Braking

Under hard braking conditions, the VSA modulator-control unit monitors wheel speed in order to allow a maximum amount of brake distribution individually to the rear wheels. Once the VSA modulator-control unit detects that one or both rear wheels are nearing their maximum braking potential, the inlet valve closes for one or both rear wheels, maintaining the current pressure. If the traction is improved, and the wheel(s) is no longer nearing its limits, the VSA modulator-control unit will open the inlet solenoid allowing additional pressure to be distributed to the rear wheel. The rear wheels are controlled independently of each other during EBD function.

If during EBD function the VSA modulator-control unit determines that the wheels are beginning to slip more than a predetermined amount, the control unit abandons EBD control and shifts to select low 3-channel ABS control.

Brake Assist

Brake assist has been added to the VSA system. 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.

Each time the ignition switch is turned ON (II), the VSA modulator-control unit learns the current driver's normal braking characteristics by monitoring the brake pressure sensor and the brake pedal position switch at each stop. Using these inputs and their values, the VSA modulator-control unit is able to learn the driver's normal braking habits, and then determine the difference between a normal stop and a panic stop for the individual driver of the vehicle. If during a panic stop the VSA modulator-control unit determines that the brake system pressure increases above a learned threshold in less than a learned amount of time, the VSA modulator-control unit engages brake assist.

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

Scheme 12

During normal braking conditions, brake assist does not affect brake system pressure.

Panic Stop

During a panic stop, the control unit turns the VSA pump ON, and opens the inlet valve. This brings the brake system pressure up high enough to cause a full ABS stop. As soon as the brake pedal is released, brake assist is stopped and the brake system returns to normal operation.

Modulator Unit

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

The modulator controls the caliper fluid pressure directly. It is a circulating-type modulator because the brake fluid circulates through the caliper, the reservoir, and the master cylinder.

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

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

Pressure intensifying mode

VSA NO valve open, VSA NC valve closed, inlet valve open, outlet valve closed.

Master cylinder fluid is pumped out to the caliper.

When starting the pressure reducing mode, the pump motor is ON. When stopping ABS operation, the pump motor is OFF.

The reservoir fluid is pumped out by the pump, through the damping chamber, to the master cylinder.

Scheme 13

Pressure retaining mode

VSA NO valve open, VSA NC valve closed, inlet valve closed, outlet valve closed.

Caliper fluid is retained by the inlet valve and outlet valve.

Scheme 14

Pressure reducing mode

VSA NO valve open, VSA NC valve closed, inlet valve closed, outlet valve open.

Caliper fluid flows through the outlet valve to the reservoir.

Scheme 15

VSA NO valve closed, VSA NC valve open, inlet valve open, outlet valve closed, pump motor ON.

The reservoir and master cylinder fluid is pumped out by the pump, through the damping chamber, to the front caliper.

Scheme 16

VSA NO valve closed, VSA NC valve open, inlet valve closed, outlet valve closed, pump motor ON.

Front caliper fluid is retained by the inlet valve and outlet valve.

Scheme 17

VSA NO valve open, VSA NC valve closed, inlet valve closed, front outlet valve open, pump motor ON.

Caliper fluid flows through the outlet valve to the reservoir.

Scheme 18

VSA NO valve closed, VSA NC valve open, inlet valve open, outlet valve closed, pump motor ON.

The reservoir and master cylinder fluid is pumped out by the pump, through the damping chamber, to the front and rear calipers.

Scheme 19

VSA NO valve closed, VSA NC valve open, inlet valve closed, outlet valve closed, pump motor ON.

Front and rear caliper fluid is retained by the inlet valve and outlet valve.

Scheme 20

VSA NO valve open, VSA NC valve closed, inlet valve closed, outlet valve open, pump motor ON.

Caliper fluid flows through the outlet valve to the reservoir.

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS.
3. Turn the ignition switch OFF, then ON (II) again.
4. Test-drive the vehicle. Do the VSA and ABS indicators come on? YES - Go to step 5. NO - Intermittent failure; system is OK at this time (see «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) ). Check for loose or poor connections.
5. Disconnect the VSA modulator-control unit 47P connector.
6. Start the engine.
7. Measure the voltage between body ground and the appropriate wheel sensor +B and GND terminals of the VSA modulator-control unit 47P connector individually (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Terminal +B GND 11 (Right-front) FR+B: No. 18 FR-GND: No. 17 13 (Left-front) FL+B: No. 4 FL-GND: No. 20 15 (Right-rear) RR+B: No. 5 RR-GND: No. 6 17 (Left-rear) RL +B: No. 2 RL-GND: No. 3 Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit and the appropriate wheel sensor. NO - Go to step 8.
8. Turn the ignition switch OFF.
9. Check for continuity between body ground and the appropriate wheel sensor +B and GND terminals of the VSA modulator-control unit 47P connector individually (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Terminal +B GND 11 (Right-front) FR+B: No. 18 FR-GND: No. 17 13 (Left-front) FL+B: No. 4 FL-GND: No. 20 15 (Right-rear) RR+B: No. 5 RR-GND: No. 6 17 (Left-rear) RL+B: No. 2 RL-GND: No. 3 Is there continuity? YES - Go to step 10. NO - Go to step 12 .
10. Disconnect the appropriate wheel sensor 2P connector.
11. Check for continuity between body ground and the appropriate wheel sensor +B and GND terminals of the VSA modulator-control unit 47P connector individually (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Terminal +B GND 11 (Right-front) FR+B: No. 18 FR-GND: No. 17 13 (Left-front) FL+B: No. 4 FL-GND: No. 20 15 (Right-rear) RR+B: No. 5 RR-GND: No. 6 17 (Left-rear) RL+B: No. 2 RL-GND: No. 3 Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit and the wheel sensor. NO - Replace the appropriate wheel sensor (see «WHEEL SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__wheel-sensor-replacement) ).
12. Disconnect the appropriate wheel sensor 2P connector.
13. Check for continuity between the appropriate wheel sensor +B and GND terminals of the VSA modulator-control unit 47P connector (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Terminal +B GND 11 (Right-front) FR +B: No, 18 FR-GND: No. 17 13 (Left-front) FL+B: No. 4 FL-GND: No. 20 15 (Right-rear) RR+B: No. 5 RR-GND: No. 6 17 (Left-rear) RL+B: No. 2 RL-GND: No. 3 Is there continuity? YES - Repair short in the wires between the VSA modulator-control unit and the wheel sensor. NO - Go to step 14.
14. Check for continuity between the appropriate +B and GND terminals of the VSA modulator-control unit 47P connector and the relative wheel sensor 2P connector. Is there continuity? YES - Go to step 15. NO - Repair open in the wire(s) between the VSA modulator-control unit 47P connector and the wheel sensor 2P connector.
15. Substitute a known-good wheel sensor for the appropriate wheel sensor (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Wheel Sensor 11 Right-front 13 Left-front 15 Right-rear 17 Left-rear
16. Clear the DTCs using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
17. Disconnect the HDS from the 16P DLC.
18. Turn the ignition switch ON (II) and then OFF.
19. Turn the ignition switch ON (II), then test-drive the vehicle at speeds above 19 mph (30 km/h). Does the ABS indicator come on? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the original wheel sensor (see «WHEEL SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__wheel-sensor-replacement) ).

DTC 12, 14, 16, 18: Wheel Sensor (Electrical Noise/Intermittent Interruption)

Note. If the ABS indicator comes on because of electrical noise, the indicator goes off when you test-drive the vehicle at 19 mph (30 km/h).

Scheme 29

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners. Does the ABS indicator come on and is DTC 12, 14, 16 or 18 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time.
5. Check the appropriate wheel sensor and magnetic encoder for debris or damage (see «WHEEL SENSOR INSPECTION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Wheel Sensor 12 Right-front 14 Left-front 16 Right-rear 18 Left-rear Is there debris or damage? YES - Go to step 6. NO - Clean or replace wheel sensor or magnetic encoder.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Check for continuity between the appropriate wheel sensor +B terminal and other wheel sensor +B terminals of the VSA modulator-control unit 47P connector (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Terminal Other Terminals 12 FR +B: No. 18 No. 4 No. 5 No. 2 14 FL +B: No. 4 No. 18 No. 5 No. 2 16 RR+B: No. 5 No. 18 No. 4 No. 2 18 RL+B: No. 2 No. 18 No. 4 No. 5 Is there continuity? YES - Repair short in the wire between the appropriate wheel sensor and the other wheel sensor. NO - Go to step 8.
8. Substitute a known-good wheel sensor for the appropriate wheel sensor (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Wheel Sensor 12 Right-front 14 Left-front 16 Right-rear 18 Left-rear
9. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
10. Disconnect the HDS from the 16P DLC.
11. Turn the ignition switch ON (II), then turn it OFF.
12. Turn the ignition switch ON (II), then test-drive the vehicle around a number of corners. Does the ABS indicator come on? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the original wheel sensor or encoder (see «WHEEL SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__wheel-sensor-replacement) ).

DTC 21, 22, 23, 24: Magnetic Encoder (Wheel Bearing)

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle at 19 mph (30 km/h) or more. Does the ABS indicator come on? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Check the appropriate magnetic encoder for debris or damage (see «DTC TERMINAL CHART»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ) (see «WHEEL SENSOR INSPECTION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Encoder 21 Right-front 22 Left-front 23 Right-rear 24 Left-rear Is the encoder OK? YES - Go to step 6. NO - Clean and reinstall or replace the magnetic encoder.
6. Clear the DTCs using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
7. Disconnect the HDS from the 16P DLC.
8. Turn the ignition switch OFF, then turn it ON (II) again.
9. Test-drive the vehicle at speeds above 19 mph (30 km/h). Does the ABS indicator come on, and are DTCs 21, 22,23, and/or 24 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the original magnetic encoder (see «WHEEL SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__wheel-sensor-replacement) ), or encoder/wheel bearing: Front hub/bearing unit (see «KNUCKLE/HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/suspension-front/#front-suspension) ) Rear hub/bearing unit (see «KNUCKLE/HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/wheel-hubs/#rear-suspension) )

DTC 25: Yaw Rate Sensor

Note. If DTC 27 or 64 is stored at the same time as DTC 25, troubleshoot those DTCs first, then recheck for DTC 25.

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners.
5. Verify the DTC. Is DTC 25 indicated? YES - Go to step 6. NO - The system is OK at this time. Check for loose terminals or poor connections.
6. Turn the ignition switch OFF.
7. Disconnect the VSA modulator-control unit 47P connector, steering angle sensor 5P connector and yaw rate-lateral/longitudinal acceleration sensor 5P connector.
8. Turn the ignition switch ON (II).
9. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 34, and No. 35 individually. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor and the steering angle sensor. NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 34, and No. 35 individually. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor, and the steering angle sensor. NO - Go to step 12.
12. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 2. Is there continuity? YES - Go to step 13. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
13. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 33 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 4. Is there continuity? YES - Go to step 14. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
14. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 34 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 3. Is there continuity? YES - Go to step 15. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
15. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor.
16. Reconnect all of the disconnected connectors.
17. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
18. Disconnect the HDS from the 16P DLC.
19. Turn the ignition switch OFF, then turn it ON (II) again.
20. Test-drive the vehicle around a number of corners.
21. Verify the DTC. Is DTC 25 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the original yaw rate-lateral/longitudinal acceleration sensor (see «YAW RATE-LATERAL/LONGITUDINAL ACCELERATION SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__yaw-rate-laterallongitudinal-acceleration-sensor-replacement) ).

DTC 26: Lateral Acceleration Sensor

Note. If DTC 27 or 64 is stored at the same time as DTC 26, troubleshoot those DTCs first, then recheck for DTC 26.

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners.
5. Verify the DTC. Is DTC 26 indicated? YES - Go to step 6. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
6. Turn the ignition switch OFF.
7. Disconnect the VSA modulator-control unit 47P connector, steering angle sensor 5P connector, and yaw rate-lateral/longitudinal acceleration sensor 5P connector.
8. Turn the ignition switch ON (II).
9. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 35, and No. 37 individually. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor, and the steering angle sensor. NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 35, and No. 37 individually. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor, and the steering angle sensor. NO - Go to step 12.
12. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 2. Is there continuity? YES - Go to step 13. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
13. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 33 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 4. Is there continuity? YES - Go to step 14. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
14. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 37 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 1. Is there continuity? YES - Go to step 15. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
15. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor.
16. Reconnect all of the disconnected connectors.
17. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
18. Disconnect the HDS from the 16P DLC.
19. Turn the ignition switch OFF, then turn it ON (II) again.
20. Test-drive the vehicle around a number of corners.
21. Verify the DTC. Is DTC 25 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the original yaw rate-lateral/longitudinal acceleration sensor (see «YAW RATE-LATERAL/LONGITUDINAL ACCELERATION SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__yaw-rate-laterallongitudinal-acceleration-sensor-replacement) ).

DTC 27: Steering Angle Sensor

Note. If DTC 27 or 64 is stored at the same time as DTC 27, troubleshoot those DTCs first, then recheck for DTC 27.

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners.
5. Verify the DTC. Is DTC 27 indicated? YES - Go to step 6. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
6. Turn the ignition switch OFF.
7. Disconnect the VSA modulator-control unit 47P connector, steering angle sensor 5P connector, and yaw rate-lateral/longitudinal acceleration sensor 5P connector.
8. Disconnect the SH-AWD control unit 26P connector and the adaptive front lighting control unit 40P connector.
9. Turn the ignition switch ON (II).
10. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 33 and No. 35 individually. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral/longitudinal acceleration sensor. NO - Go to step 11.
11. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 28, No. 29, and No. 43 individually. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral/longitudinal acceleration sensor. NO - Go to step 12.
12. Turn the ignition switch OFF.
13. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 33 and No. 35 individually. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral/ longitudinal acceleration sensor. NO - Go to step 14.
14. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 28, No. 29, and No. 43 individually. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral/longitudinal acceleration sensor. NO - Go to step 15.
15. Check for continuity between the VSA modulator-control unit 47P connector terminals No. 33, No. 35 and steering angle sensor 5P connector terminals No. 1, No. 5 respectively. Is there continuity? YES - Go to step 16. NO - Repair open in the wire between the VSA modulator-control unit and the steering angle sensor.
16. Check for continuity between the VSA modulator-control unit 47P connector terminals No. 28, No. 29, No. 43 and steering angle sensor 5P connector terminals No. 2, No. 3, No. 4 respectively. Is there continuity? YES - Go to step 17. NO - Repair open in the wire between the VSA modulator-control unit and the steering angle sensor.
17. Substitute a known-good steering angle sensor.
18. Reconnect all of the disconnected connectors.
19. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
20. Disconnect the HDS from the 16P DLC.
21. Turn the ignition switch OFF, then turn it ON (II) again.
22. Test-drive the vehicle around a number of corners.
23. Verify the DTC. Is DTC 27 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector and the steering angle sensor 5P connector, and repair if necessary. If no poor connections are found, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO - Replace the original steering angle sensor (see «STEERING ANGLE SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__steering-angle-sensor-replacement) ).

DTC 28: Longitudinal Acceleration Sensor

Note. If DTC 27 or 64 is stored at the same time as DTC 28, troubleshoot those DTCs first, then recheck for DTC 28.

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

1. Clear the DTC, and disconnect the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Turn the ignition switch OFF, then turn it ON (II) again.
3. Test-drive the vehicle around a number of corners.
4. Verify the DTC. Is DTC 28 indicated? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Turn the ignition switch OFF.
6. Disconnect the VSA modulator-control unit 47P connector, steering angle sensor 5P connector, and yaw rate-lateral/longitudinal acceleration sensor 5P connector.
7. Turn the ignition switch ON (II).
8. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 35, and No. 39 individually. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor. NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 35, and No. 39 individually. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor. NO - Go to step 11.
11. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 2. Is there continuity? YES - Go to step 12. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
12. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 33 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 4. Is there continuity? YES - Go to step 13. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
13. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 39 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 5. Is there continuity? YES - Go to step 14. NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.
14. Reconnect all of the disconnected connectors.
15. Turn the ignition switch ON (II).
16. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 32 and No. 47 individually. Is there 0.1 V or less? YES - Go to step 17. NO - Repair open in the wire between the VSA modulator-control unit and body ground (G202). If the wire is OK, check for a poor connection at body ground (G202).
17. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor.
18. Clear the DTC (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
19. Disconnect the HDS from the 16P DLC.
20. Turn the ignition switch OFF, then turn it ON (II) again.
21. Test-drive the vehicle around a number of corners.
22. Verify the DTC. Is DTC 28 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Replace the yaw rate-lateral/longitudinal acceleration sensor (see «YAW RATE-LATERAL/LONGITUDINAL ACCELERATION SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__yaw-rate-laterallongitudinal-acceleration-sensor-replacement) ).

DTC 31, 32, 33, 34, 35, 36, 37, 38: ABS Solenoid

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Turn the ignition switch ON (II).
3. Verify the DTC. Does the ABS indicator come on, and are DTCs 31, 32, 33, 34, 35, 36, 37, and/or 38 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 41, 42, 43, 44: Wheel Lock

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF.
4. Check for brake drag; test-drive the vehicle using the brake often, lift the vehicle on the hoist, rotate each tire by hand. Do the brakes drag? YES - Repair the brake drag. NO - Go to step 5.
5. Check the installation of the appropriate wheel sensor and magnetic encoder for damage, debris, or excessive air gap (see «WHEEL SENSOR INSPECTION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). DTC TERMINAL CHART DTC Appropriate Wheel Sensor 41 Right-front 42 Left-front 43 Right-rear 44 Left-rear Is it correct? YES - If the DTC does not reappear, the most probable cause for the DTC is that the vehicle might have lost traction in poor weather and spun around. NO - Reinstall or replace the wheel sensor (see «WHEEL SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__wheel-sensor-replacement) ) or magnetic encoder: Front (see «KNUCKLE/HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/suspension-front/#front-suspension) ), rear (see «KNUCKLE/HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/wheel-hubs/#rear-suspension) ).

Scheme 52

Scheme 53

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners. Does the VSA indicator come on and is DTC 51 or 52 stored? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Check the No. 17 (30 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES - Reinstall the fuse, and go to step 6. NO - Replace the fuse, and recheck.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 16 and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between the No. 17 (30 A) fuse and the VSA modulator-control unit.
8. Turn the ignition switch ON (II).
9. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 47 and body ground. Is there continuity? YES - Go to step 10. NO - Repair open in the wire between the VSA modulator-control unit and body ground (G202).
10. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
11. Turn the ignition switch OFF, then turn it ON (II) again.
12. Test-drive the vehicle at 10 mph (15 km/h) or more. Does the ABS indicator come on, and is DTC 51 or 52 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

Scheme 54

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners, and leave the ignition switch ON (II). Does the VSA indicator come on and is DTC 53 stored? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Turn the ignition switch OFF.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 47 and body ground. Is there continuity? YES - Go to step 8. NO - Repair open or high resistance in the wire between the VSA modulator-control unit and body ground (G202).
8. Reconnect the VSA modulator-control unit 47P connector.
9. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
10. Turn the ignition switch OFF, then turn it ON (II) again.
11. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 53 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

Scheme 55

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners, and leave the ignition switch ON (II). Does the VSA indicator come on and is DTC 54 stored? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Turn the ignition switch OFF.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 47 and body ground. Is there continuity? YES - Go to step 8. NO - Repair open or high resistance in the wire between the VSA modulator-control unit and body ground (G202).
8. Reconnect the VSA modulator-control unit 47P connector.
9. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
10. Turn the ignition switch OFF, then turn it ON (II) again.
11. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 54 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 61,62: Low/High Voltage

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners. Does the ABS indicator come on? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Verify the DTC. Is DTC 61 or 62 indicated? YES - Check the battery (see «BATTERY TEST»(/acura/rl/ii-2004-2008/remont/body-electrical/#battery) ) and the charging system (see «ALTERNATOR CONTROL CIRCUIT TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/charging-system/#charging-system) ). NO - Do the appropriate troubleshooting for the DTC indicated.

Scheme 56

Scheme 57

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle around a number of corners. Does the VSA indicator come on and is DTC 64 stored? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Disconnect the VSA modulator-control unit 47P connector, the steering angle sensor 5P connector, and the yaw rate-lateral/longitudinal acceleration sensor 5P connector.
6. Start the engine.
7. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 35 and body ground. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit and yaw rate-lateral/longitudinal acceleration sensor and steering angle sensor. NO - Go to step 8.
8. Turn the ignition switch OFF.
9. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit and yaw rate-lateral/longitudinal acceleration sensor and steering angle sensor. NO - Go to step 10.
10. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
11. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 64 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) and check connections at the VSA modulator-control unit 47P connector and body ground (G202).

Scheme 58

1. Check the brake fluid level. Is the level correct? YES - Go to step 2. NO - Inspect the brake system for fluid leaks. If no leaks are found, check for all worn brake pads.
2. Disconnect gauge control module connector B (28P) and brake fluid level switch 2P connector.
3. Check for continuity between terminal No. 13 of gauge control module connector B (28P) and body ground. Is there continuity? YES - Repair short to body ground in the wire between gauge control module connector B and the brake fluid level switch. NO - Go to step 4.
4. Check the brake fluid level switch (see «PARKING BRAKE SWITCH TEST»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__parking-brake-switch-test) ). Is the switch OK? YES - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ). NO - Replace the brake fluid level switch.

DTC 66: VSA Pressure Sensor (Inside of VSA Modulator-Control Unit)

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Remove the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II).
4. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 25, 26,27, or 64 indicated? YES - Do the appropriate troubleshooting for the DTC. NO - Go to step 5.
5. Do the VSA sensor neutral position memorization (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-sensor-neutral-position-memorization) ).
6. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
7. Disconnect the HDS from the 16P DLC.
8. Turn the ignition switch OFF, then turn it ON (II).
9. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 66 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 68: Brake Pedal Position Switch

1. Check for other DTCs in the PGM-FI system. Are other DTCs indicated? YES - Do the appropriate troubleshooting for the DTCs. NO - Go to step 2.
2. Check the brake pedal position switch (see «BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components) ). Is the switch OK? YES - Go to step 3. NO - Adjust the brake pedal position switch (see «BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components) ).
3. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
4. Disconnect the HDS from the 16P DLC.
5. Turn the ignition switch OFF, then turn it ON (II).
6. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 68 indicated? YES - Go to step 7. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
7. Troubleshoot the brake pedal position switch circuit (see «CIRCUIT DIAGRAM»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). Is the brake pedal position switch circuit OK? YES - Substitute a known-good PCM and recheck: If the problem is gone, replace the original PCM. If the problem continues, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO - Repair the brake pedal position switch circuit.

DTC 71: Different Diameter Tire

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 71 indicated? YES - Go to step 5. NO - Confirm that tire inflation is set to spec. The vehicle is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Check that all four tires are the specified size and are inflated to the proper specification. Are all four tires the correct size and properly inflated? YES - Go to step 6. NO - Install the correct tires or set the tires to the correct inflation, and retest.
6. With the vehicle on level ground, mark each tire with a small spot of grease. Roll the vehicle until each of the tires makes two grease spots on the floor.
7. Measure and record the distance between the two grease spots. Is the difference between the shortest and the longest measurement more than 10%? YES - Replace the tire/tires that is smaller or larger than the others. NO - Replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).

Scheme 59

Scheme 60

1. Check for other DTCs. Is another DTC indicated? YES - Do the appropriate troubleshooting for the DTC. NO - Go to step 2.
2. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
3. Disconnect the HDS from the 16P DLC.
4. Turn the ignition switch OFF, then turn it ON (II) again.
5. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 81 indicated? YES - Go to step 6. NO - The vehicle is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
6. Disconnect the VSA modulator-control unit 47P connector, the steering angle sensor 5P connector, and the yaw rate-lateral/longitudinal acceleration sensor 5P connector.
7. Start the engine.
8. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 35 and body ground. Is there 0.1 V or more? YES - Repair short to power in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor, and the steering angle sensor. NO - Go to step 9.
9. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the VSA modulator-control unit, the yaw rate-lateral/longitudinal acceleration sensor, and the steering angle sensor. NO - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck.

DTC 83: PCM

1. Check the DTC. Is DTC 86 indicated? YES - Do the troubleshooting for DTC 86 (see «DTC 86: F-CAN COMMUNICATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__dtc-86-f-can-communication) ). NO - Go to step 2.
2. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
3. Disconnect the HDS from the 16P DLC.
4. Turn the ignition switch OFF, then turn it ON (II).
5. Test-drive the vehicle. Do the VSA and VSA activation indicators come on, and is DTC 83 indicated? YES - Go to step 6. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
6. Check the PGM-FI system. Does the MIL indicator come on or is a PCM DTC indicated? YES - Do the applicable troubleshooting for the PGM-FI system DTC. NO - Go to step 7.
7. Check the gear position indicator. Does the D indicator come on while neutral position (N) is selected or is a PCM DTC indicated? YES - Do the applicable troubleshooting for the A/T system. NO - Check for loose terminals at the PCM connectors, and go to step 8.
8. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
9. Turn the ignition switch OFF, then turn it ON (II).
10. Test-drive the vehicle. Is DTC 83 indicated and no PCM's DTC? YES - Substitute a known-good PCM, and recheck. If the code returns, check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 84: VSA Sensor Neutral Position

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle. Does the VSA indicator come on, and is DTC 84 indicated? YES - Go to step 5. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Check for other DTCs. Are any other DTCs indicated? YES - Troubleshoot the appropriate DTC. NO - Go to step 6.
6. Do the VSA sensor neutral position memorization (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-sensor-neutral-position-memorization) ).
7. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
8. Disconnect the HDS from the 16P DLC.
9. Turn the ignition switch OFF, then turn it ON (II) again.
10. Test-drive the vehicle. Does the VSA indicator come on, and is DTC 84 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 86: F-CAN Communication

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Start and run the engine for at least 5 seconds then turn the engine off.
3. Check for DTCs using the HDS. Is DTC 86 indicated? YES - Go to step 4. NO - The F-CAN communication line is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
4. Check for DTCs in the PCM. Are any DTCs indicated? YES - Troubleshoot the PCM DTCs. NO - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck.

DTC 107: TCS Operation; DTC 108: VSA Operation

Note. The ABS/VSA indicators do not come on DTC 107 or 108 memorized.

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle. Is DTC 107 or DTC 108 indicated ? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

DTC 112: Internal Power Source Stuck OFF

Note. If the battery cable was disconnected three times with the ignition switch ON (II), this DTC may be stored.

Scheme 61

1. Check for other DTCs. Is another DTC indicated? YES - Do the appropriate troubleshooting for the DTC. NO - Go to step 2.
2. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
3. Disconnect the HDS from the 16P DLC.
4. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 112 indicated? YES - Go to step 5. NO - The vehicle is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .
5. Inspect G202 for a clean and tight connection. Is G202 clean and properly connected? YES - Go to step 6. NO - Repair the connection at G202.
6. Turn the ignition switch ON (II).
7. Measure the voltage between body ground and VSA modulator-control unit 47P connector terminals No. 32 and No. 47 individually. Is there 0.1 V or less? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Intermittent failure; the vehicle is OK at this time (see «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) ).

DTC 121, 122, 123, 124: VSA Solenoid

1. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle. Does the VSA indicator come on, and is DTC 121, 122, 123, or 124 indicated? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) .

ABS indicator does not come on

1. Turn the ignition switch ON (II), and watch the ABS indicator. Does the ABS indicator come on for several seconds? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 2.
2. Apply the parking brake. Does the brake system indicator come? YES - Go to step 3. NO - Repair open in the gauge control module indicator power source circuit.
3. Turn the ignition switch OFF.
4. Disconnect the VSA modulator-control unit 47P connector.
5. Turn the ignition switch ON (II). Does the VSA indicator come on? YES - Go to step 6. NO - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ).
6. Turn the ignition switch OFF.
7. Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
8. Turn the ignition switch ON (II). Does ABS indicator come on? YES - Replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ).

Scheme 62

Scheme 63

Scheme 64

1. Check the No. 18 (40 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES - Reinstall the fuse, and go to step 2. NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
2. Check the No. 18 (15 A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES - Reinstall the fuse, and go to step 3. NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit If the circuit is OK, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
3. Turn the ignition switch OFF.
4. Disconnect the VSA modulator-control unit 47P connector.
5. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 6. NO - Repair open in the wire between the No. 18 (40 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.
6. Turn the ignition switch ON (II).
7. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 38 and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between the No. 18 (15 A) fuse in the driver's under-dash fuse/relay box and the VSA modulator-control unit.
8. Turn the ignition switch OFF.
9. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 32 and body ground. Is there continuity? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. Substitute a known-good gauge control module, and recheck. If the test results are the same, substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Repair open in the wire between the VSA modulator-control unit and body ground (G202).

Scheme 65

1. With the parking brake applied, turn the ignition switch ON (II), and watch the brake system indicator. Does the brake system indicator come on? YES - The brake system indicator is OK at this time. NO - Go to step 2.
2. Turn the ignition switch OFF then ON (II) again. Does the ABS indicator come on for several seconds? YES - Go to step 3. NO - Repair open in the indicator power source circuit. If necessary, substitute a known-good gauge control module, and recheck.
3. Turn the ignition switch OFF.
4. Release the parking brake.
5. Turn the ignition switch ON (II). Does the brake system indicator come on for several seconds? YES - Go to step 6. NO - Check for loose terminals or poor connections at the gauge control module connectors. If connections are good, replace the gauge control module, and recheck.
6. Apply the parking brake. Does the brake system indicator come on? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 7.
7. Turn the ignition switch OFF.
8. Disconnect the parking brake switch connector (see «PARKING BRAKE SWITCH TEST»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__parking-brake-switch-test) ).
9. Turn the ignition switch ON (II).
10. Measure the voltage between the parking brake switch connector terminal and body ground. Is there battery voltage? YES - Replace the parking brake switch (see «PARKING BRAKE SWITCH TEST»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__parking-brake-switch-test) ). NO - Go to step 11.
11. Turn the ignition switch OFF.
12. Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ). Leave the gauge control module connectors connected.
13. Connect gauge control module connector B (28P) terminal No. 14 and body ground with a jumper wire.
14. Turn the ignition switch ON (II). Does the brake system indicator come on and stay on? YES - Repair open in the wire between the gauge control module, and the parking brake switch. NO - Replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ).

Brake system indicator does not go off, and no DTCs are stored

1. Turn the ignition switch ON (II).
2. Release the parking brake. Does the brake system indicator go off after several seconds? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 3.
3. Check the brake fluid level (see «BRAKE SYSTEM BLEEDING»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__brake-system-bleeding) ). Is the level OK? YES - Go to step 4. NO - Inspect the brake system for fluid leak. If no leaks are found, replace all worn brake pads.
4. Check the ABS indicator. Does the ABS indicator stay on? YES - Read the DTC (see «HOW TO RETRIEVE DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-retrieve-dtcs) ), and do the applicable troubleshooting for the DTC. NO - Check the brake system indicator circuit: Short to body ground between the gauge control module and the parking brake switch. Short to body ground between the gauge control module and the brake fluid level switch. Parking brake switch stuck ON. Brake fluid level switch stuck ON. Faulty gauge control module.

VSA indicator does not come on

1. Turn the ignition switch ON (II), and watch the VSA indicator. Does the VSA indicator come on for several seconds? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 2.
2. Apply the parking brake. Does the brake system indicator come on? YES - Go to step 3. NO - Repair open in the gauge control module indicator power source circuit.
3. Turn the ignition switch OFF.
4. Disconnect the VSA modulator-control unit 47P connector.
5. Turn the ignition switch ON (II). Does the VSA indicator come on? YES - Go to step 6. NO - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ).
6. Turn the ignition switch OFF.
7. Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
8. Turn the ignition switch ON (II). Does the VSA indicator come on? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), and recheck. NO - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ).

Scheme 66

Scheme 67

Scheme 68

1. Check the No. 18 (40 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES - Reinstall the fuse, and go to step 2. NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
2. Check the No. 18 (15 A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES - Reinstall the fuse, and go to step 3. NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
3. Turn the ignition switch OFF.
4. Disconnect the VSA modulator-control unit 47P connector.
5. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 6. NO - Repair open in the wire between the No. 18 (40 A) fuse and the VSA modulator-control unit.
6. Turn the ignition switch ON (II).
7. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 38 and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between the No. 18 (15 A) fuse and the VSA modulator-control unit.
8. Turn the ignition switch OFF.
9. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 32 and body ground. Is there continuity? YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. Substitute a known-good gauge control module, and recheck. If the test results are the same, substitute a known-good VSA modulator-control unit and recheck. NO - Repair open in the wire between the VSA modulator-control unit and body ground (G202).

VSA activation indicator does not come on at start-up (bulb check)

1. Turn the ignition switch ON (II), and watch the VSA activation indicator. Does the VSA activation indicator come on for several seconds? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 2.
2. Apply the parking brake. Does the brake system indicator come on? YES - Go to step 3. NO - Repair open in the gauge control module indicator power source circuit.
3. Turn the ignition switch OFF.
4. Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
5. Turn the ignition switch ON (II). Does the VSA activation indicator come on? YES - Replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO - Do the troubleshooting for the gauge control module (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ).

Scheme 69

Scheme 70

1. Turn the ignition switch ON (II), and watch the VSA indicator. Does the VSA indicator go off? YES - Go to step 2. NO - Do the appropriate troubleshooting for the VSA indicator.
2. Turn the ignition switch OFF.
3. Check the VSA OFF switch (see «VSA OFF SWITCH TEST»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). Is the switch OK? YES - Go to step 4. NO - Replace the VSA OFF switch (see «VSA OFF SWITCH TEST»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ).
4. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ). Does the VSA activation indicator go off? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 5.
5. Do the VSA sensor neutral memorization (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-sensor-neutral-position-memorization) ).
6. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
7. Disconnect the HDS from the 16P DLC.
8. Check the VSA activation indicator. Does the VSA activation indicator go off? YES - The system is OK at this time. Refer to «INTERMITTENT FAILURES»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__intermittent-failures) . NO - Go to step 9.
9. Remove the gauge control module, and disconnect gauge control module connector B (28P) (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ).
10. Check for continuity between the VSA OFF switch 6P connector terminal No. 4 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the gauge control module and the VSA OFF switch. NO - Go to step 11.
11. Reconnect gauge control module connector B (28P).
12. Turn the ignition switch ON (II).
13. Measure the voltage between the VSA OFF switch 6P connector terminal No. 6 and body ground. Is there 0.1 V or less? YES - Go to step 14. NO - Repair open in the wire between the VSA OFF switch and body ground (G501).
14. Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
15. Reconnect all of the disconnected connectors.
16. Clear the DTC using the HDS (see «HOW TO CLEAR DTCS»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__how-to-clear-dtcs) ).
17. Test-drive the vehicle. Does the VSA activation indicator go off? YES - Replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO - Check for loose terminals or poor connections at the gauge control module connectors. If connections are good, replace the gauge control module, and recheck.

Steering Angle Sensor Replacement

Note. Do not damage or drop the combination switch as the steering angle sensor is sensitive to shock and vibration.

Scheme 71

1. Make sure the ignition switch is OFF.
2. Remove the steering wheel (see «STEERING WHEEL REMOVAL»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system__steering-wheel-removal) ).
3. Remove the steering column cover and combination switch assembly (see «STEERING COLUMN REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system__steering-column-removal-and-installation) ).
4. Remove the combination light switch (A) and the wiper/washer switch (B).
5. Replace the combination switch body complete (C).
6. Install the combination switch in the reverse order of removal. NOTE: Do not remove the steering angle sensor from the combination switch body.
7. Do the SH-AWD steering neutral position memorization procedure (see «SH-AWD DIFFERENTIAL CLUTCH TORQUE MEMORIZATION»(/acura/rl/ii-2004-2008/remont/differentials-drive-axles/#rear-differential__sh-awd-differential-clutch-torque-memorization) ).
8. Do the adaptive front lighting control unit learning procedure (see «WHEN THE AFS OFF SWITCH OR COMBINATION LIGHT SWITCH IS REPLACED.»(/acura/rl/ii-2004-2008/remont/exterior-lights/#adaptive-front-lighting-system__when-the-afs-off-switch-or) ).

Yaw Rate-Lateral/Longitudinal Acceleration Sensor Replacement

Note. Do not damage or drop the sensor as it is sensitive. Do not use power tools.

Scheme 72

1. Make sure the ignition switch is OFF.
2. Remove the center console side panel (see step 5 under «CENTER CONSOLE REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#consoles__center-console-removalinstallation) ).
3. Remove the center console panel (see step 1 under «CENTER CONSOLE REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#consoles__center-console-removalinstallation) ).
4. Remove the shift lever mounting bolts (see step 5 under «SHIFT LEVER REMOVAL»(/acura/rl/ii-2004-2008/remont/automatic-trans/#automatic-transmission) ). NOTE: Only remove items needed to gain access.
5. Remove the yaw rate-lateral/longitudinal acceleration sensor bracket fixing bolts, and then disconnect the sensor connector (A).
6. Pull out the yaw rate-lateral/longitudinal acceleration sensor bracket (B) with the yaw rate-lateral/longitudinal acceleration sensor.
7. Remove the sensor mounting bolts, and then separate the sensor (C) from the bracket.
8. Install the sensor in the reverse order of removal.
9. Do the VSA sensor neutral position memorization (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-sensor-neutral-position-memorization) ).
10. Do the SH-AWD yaw rate-lateral/longitudinal acceleration sensor neutral position memorization procedure (see «SH-AWD DIFFERENTIAL CLUTCH TORQUE MEMORIZATION»(/acura/rl/ii-2004-2008/remont/differentials-drive-axles/#rear-differential__sh-awd-differential-clutch-torque-memorization) ).

VSA Sensor Neutral Position Memorization

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

Scheme 73

1. Park the vehicle on a flat and level surface.
2. With the ignition switch OFF, connect the HDS to the 16P data link connector (DLC) (A) under the driver's side of the dashboard.
3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn't troubleshoot the DLC circuit (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/rl/ii-2004-2008/remont/testing-diagnostics/#pgm-fi-system) ).
5. Do the VSA sensor neutral position memorization in the VSA ADJUSTMENT with the HDS. NOTE: See the HDS Help menu for specific instructions.
6. Turn the ignition switch OFF.

Scheme 74

Scheme 75

1. Remove the instrument fascia (see «DRIVER'S SWITCH PANEL REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard__drivers-switch-panel-removalinstallation) ).
2. Remove the VSA OFF switch (A) from the switch panel.
3. Disconnect the VSA OFF switch 6P connector.
4. Check for continuity between the VSA OFF switch 6P connector terminals No. 4 and No. 6. There should be continuity when the switch is pressed, and no continuity when the switch is released.

VSA Modulator-Control Unit Removal and Installation

Note. 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 lines during removal and installation. To prevent the brake fluid from flowing, plug and cover the hose ends and joints with a shop towel or equivalent material.

Scheme 76

Scheme 77

1. Make sure the ignition switch is OFF.
2. Remove the right upper fender trim (see «UPPER FENDER TRIM REPLACEMENT»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#exterior-trim__upper-fender-trim-replacement) ).
3. Remove the A/C line mounting bolt (A).
4. Remove the engine mount bracket mounting bolts (B).
5. Remove the upper portion of the washer reservoir (C).
6. Remove the power steering fluid reservoir (D) bracket.
7. Pull down the lock (A) of the VSA modulator-control unit 47P connector (B), and the connector disconnects itself.
8. Disconnect the six brake lines from the VSA modulator-control unit (C).
9. Disconnect the harness clip (D).
10. Remove the three 6 mm bolts, then remove the VSA modulator-control unit with bracket (E) from the body.
11. Remove the three 6 mm bolts, then remove the VSA modulator-control unit from the bracket.

Installation

1. Install the VSA modulator-control unit to the bracket, then tighten the three 6 mm bolts.
2. Install the VSA modulator-control unit/bracket on the body, then tighten the three 6 mm bolts.
3. Reconnect the six brake lines, then tighten the nuts.
4. Align the connecting surface of the VSA modulator-control unit 47P connector.
5. Carefully push in the lock of the VSA modulator-control unit 47P connector until you hear it click into place, then confirm the connector is fully seated.
6. Install the power steering fluid reservoir bracket and upper portion of the washer reservoir.
7. Install the engine mount bracket mounting bolts.
8. Install the A/C line mounting bolt.
9. Install the right upper fender trim (see «UPPER FENDER TRIM REPLACEMENT»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#exterior-trim__upper-fender-trim-replacement) ).
10. Bleed the brake system, starting with the front wheels (see «BRAKE SYSTEM BLEEDING»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__brake-system-bleeding) ).
11. Do the VSA sensor neutral position memorization (see «VSA SENSOR NEUTRAL POSITION MEMORIZATION»(/acura/rl/ii-2004-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-sensor-neutral-position-memorization) ).
12. Do the adaptive front lighting control unit learning procedure (see «WHEN THE AFS OFF SWITCH OR COMBINATION LIGHT SWITCH IS REPLACED.»(/acura/rl/ii-2004-2008/remont/exterior-lights/#adaptive-front-lighting-system__when-the-afs-off-switch-or) ).
13. Start the engine, and check that the ABS and VSA indicators go off.
14. Test-drive the vehicle, and check that the ABS and VSA indicators do not come on.
15. If the brake pedal is now spongy, there may be air trapped in the modulator and then induced into the normal brake system during modulation. Bleed the brake system again, starting with the front wheels (see «BRAKE SYSTEM BLEEDING»(/acura/rl/ii-2004-2008/remont/mechanical-hydraulic/#conventional-brake-components__brake-system-bleeding) ).

Scheme 78

Scheme 79

1. Clean the magnetic encoder, and make sure no metal or other debris is stuck to the magnetic encoder surface.
2. Check the magnetic encoder (A) for damage. If cracked or damaged, replace the encoder (wheel bearing). Front wheel bearing replacement (see «HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/suspension-front/#front-suspension) ). Rear wheel bearing replacement (see «HUB BEARING UNIT REPLACEMENT»(/acura/rl/ii-2004-2008/remont/wheel-hubs/#rear-suspension) ). Front Rear
3. Measure the air gap between the wheel sensor (B) and the magnetic encoder all the way around while rotating the encoder. Standard: Front: 1.0-1.7 mm (0.04-0.07 in.) Rear: 0.9-1.8 mm (0.04-0.07 in.)

Wheel Sensor Replacement

Note. Install the sensor carefully to avoid twisting the wires. Replace the clamps (A) when the wheel sensors are removed or replaced.

Front

Scheme 80

Rear

Scheme 81

See also:
• BRAKE SYSTEM BLEEDING
• DLC CIRCUIT TROUBLESHOOTING
• KNUCKLE/HUB BEARING UNIT REPLACEMENT
• KNUCKLE/HUB BEARING UNIT REPLACEMENT
• BATTERY TEST
• ALTERNATOR CONTROL CIRCUIT TROUBLESHOOTING
• PARKING BRAKE SWITCH TEST
• SELF-DIAGNOSTIC FUNCTION
• BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT
• GAUGE CONTROL MODULE REPLACEMENT
• STEERING WHEEL REMOVAL
• STEERING COLUMN REMOVAL AND INSTALLATION
• SH-AWD DIFFERENTIAL CLUTCH TORQUE MEMORIZATION
• WHEN THE AFS OFF SWITCH OR COMBINATION LIGHT SWITCH IS REPLACED.
• CENTER CONSOLE REMOVAL/INSTALLATION
• SHIFT LEVER REMOVAL
• DRIVER'S SWITCH PANEL REMOVAL/INSTALLATION
• UPPER FENDER TRIM REPLACEMENT
• DTC TROUBLESHOOTING
• 12
• 21
• 25
• 26
• 27
• 28
• 31
• 41
• 61
• 66
• 68
• 71
• 83
• 84
• 86
• 107
• 112
• 121
• ABS INDICATOR DOES NOT COME ON
• BRAKE SYSTEM INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED
• VSA INDICATOR DOES NOT COME ON
• VSA ACTIVATION INDICATOR DOES NOT COME ON AT START-UP (BULB CHECK)
• HOW TO CLEAR DTCS
• INTERMITTENT FAILURES
• WHEEL SENSOR REPLACEMENT
• VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
• YAW RATE-LATERAL/LONGITUDINAL ACCELERATION SENSOR REPLACEMENT
• STEERING ANGLE SENSOR REPLACEMENT
• VSA SENSOR NEUTRAL POSITION MEMORIZATION
• HOW TO RETRIEVE DTCS