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Honda Ridgeline. Manual - part 325

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Brakes

Conventional Brake Components

19-1

VSA (Vehicle Stability Assist) System Components

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Component Location Index

. 19-38

General Troubleshooting Information

. 19-39

DTC Troubleshooting Index

. 19-42

Symptom Troubleshooting Index

. 19-43

System Description

. 19-44

Circuit Diagram

. 19-56

DTC Troubleshooting

. 19-59

Symptom Troubleshooting

. 19-85

Steering Angle Sensor Replacement

. 19-91

Steering Angle Sensor Center Point Writing

. 19-92

Yaw Rate-Lateral Acceleration

Sensor Replacement

. 19-92

VSA OFF Switch Test

. 19-93

VSA Modulator-Control Unit

Removal and Installation

. 19-94

Wheel Sensor Inspection

. 19-96

Wheel Sensor Replacement

. 19-97

＊０１

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19-38

VSA System Components

Component Location Index

STEERING ANGLE SENSOR

UNDER-DASH
FUSE/RELAY BOX

YAW RATE-LATERAL
ACCELERATION SENSOR

RIGHT-REAR WHEEL SENSOR

LEFT-REAR WHEEL SENSOR

LEFT-FRONT WHEEL SENSOR

UNDER-HOOD
FUSE/RELAY BOX

AUXILIARY FUSE BOX

DATA LINK CONNECTOR (DLC)

RIGHT-FRONT WHEEL SENSOR

WHEEL BEARING
(MAGNETIC ENCODER)

VSA MODULAOR-CONTROL UNIT

WHEEL BEARING (MAGNETIC ENCODER)

Replacement, page 19-91

Replacement, page 19-92

Inspection, page 19-96
Replacement, page 19-97

Replacement, page 18-28

Removal and Installation, page 19-94

Replacement, page 18-13

０１

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System Indicator

ABS indicator

Brake system indicator

VSA indicator

VSA activation indicator

ABS and VSA indicators go off

19-39

General Troubleshooting Information

This system has four indicators:

• ABS indicator (A)
• Brake system indicator (B)
• VSA indicator (C)
• VSA activation indicator (D)

When the system detects a problem, it turns the
appropriate indicators on. Depending on the failure, the
VSA modulator-control unit determines which
indicators to turn on.
When the system is OK, each indicator comes on for
about 2 seconds after turning the ignition switch ON (II),
then goes off.

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

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

The VSA indicator comes on when the VSA function is
lost.

The VSA activation indicator blinks when the VSA
function is activating. The VSA activation indicator
comes on when VSA is off or VSA function is lost.

Each indicator goes off after a problem goes away, but
the timing which the VSA modulator-control unit turns
off the indicators varies between DTCs.

• DTC 61 or 62:

The indicators go off automatically when the system
returns to normal.

• DTC 11, 13, 15, 17, 21 , 25, 26, 27, 31, 32, 33, 34, 35,

36, 37, 38, 45, 46, 47, 48, 54, 65, 66, 67, 68, 72, 73, 74,
75, 76, 81, 84, 91, 92, or 97

The indicators stay on until the ignition switch is
turned OFF whether or not the system returns to
normal.

: There are some cases that the indicators stay on

until the vehicle is driven after the system returns to
normal.

: There are some cases that the indicators go off

automatically when the system returns to normal.

• DTC 12, 14, 16, 18, 51, 52, or 53:

The indicators stay on until the vehicle is driven after
the system returns to normal.

(cont’d)

Diagnostic Trouble Code (DTC)

Self-diagnosis

Kickback

Pump Motor

Brake Fluid Replacement/Air Bleeding

How to Troubleshoot DTCs

Intermittent Failures

19-40

VSA System Components

General Troubleshooting Information (cont’d)

• The memory can hold 10 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.

• The DTCs are indicated in the order they occur.
• The DTCs are memorized in the EEPROM. Therefore,

the memorized DTCs cannot be canceled by
disconnecting the battery. Do the specified
procedures to clear the DTCs.

• 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.

• When the system detects a problem, the VSA

modulator-control unit shifts to fail-safe mode.

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

• The pump motor operates when the VSA modulator-

control unit is functioning.

• The VSA modulator-control unit checks the pump

motor operation one time after completing initial
diagnosis during regular diagnosis when the vehicle
is driven over 10 mph (15 km/h). You may hear the
motor operate at this time, but it is normal.

Brake fluid replacement and air bleeding procedures
are identical to the procedures used on vehicles not
equipped with the VSA system (see page 19-9).

The troubleshooting procedures assume that the cause
of the problem is still present and the ABS and/or VSA
indicator is still on. Following the flowchart when the
ABS and/or VSA indicator does 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. Ask the customer about the conditions when the

problem occured, and try to reproduce the same
conditions for troubleshooting. Find out when the
ABS and/or VSA indicator came on, such as during
control, after control, when the vehicle was
travelling at a certain speed, etc.

2. When the ABS or VSA indicator does 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 as originally set with the DTCs. Make
sure the ABS and VSA indicators do not come on.

4. Check for other systems DTCs which 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 PGM-FI and ABS codes, and troubleshoot those
first.

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

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