Suzuki Grand Vitara JB416 / JB420 (ESP model). Manual — part 62

4F-2 Electronic Stability Program:

Precautions in Sensor Calibration

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ESP

® control module stores calibration points data of yaw rate / G sensor assembly and master cylinder pressure

sensor. Steering angle sensor stores calibration point data of itself.
TCS and stability control system use these sets of data.
When the following operation is done, calibration should be performed since the original calibration points are deleted.

Perform sensor calibration according to “Sensor Calibration”.

Precautions in Speedometer Test or Other Tests

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When performing speedometer or a bench test while rotating a tire, ESP

® function must be kept at stop. It is possible

to stop ESP

® function temporarily by ESP® OFF switch. In this case, however, the function is forced to come back to

work when the speed exceeds 30 km/h (18.5 mph) and may hinder accurate testing.
There are two ways to stop the ESP

® function completely as described bellow.

• Connect the SUZUKI scan tool, set to the “MISC. TEST” mode to stop the ESP

® function. Refer to SUZUKI scan

tool operator's manual for further details.

• Disconnect the connector of the steering angle sensor, and ESP

® function is forced to enter the fail-safe mode,

then ESP

® function is stopped.

However, when this method is used, DTC remains in the memory of the ESP

® control module. Therefore, after the

test, re-connect the connector, clear DTC in the memory of the ESP

® control module. And calibrate steering angle

sensor referring to “Sensor Calibration”.

General Description

Electronic Stability Program Description

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Electronic Stability Program (ESP

®) main function is to

control ABS / EBD, TCS and stability.
• ABS / EBD

ABS function is that four wheel brake forces are
independently varied with referring each wheel slip
condition.
EBD function is that front and rear wheel braking
forces are varied with referring loading distribution of
the vehicle.
ABS improves the vehicle stability, controllability and
braking performance.
For the details, refer to “ABS Description in Section
4E”.

• TCS (Traction Control System)

TCS function is that engine torque is controlled and
brake is applied with referring wheel spin condition
during vehicle starting and accelerating.

• Stability control system

Stability control system is that engine torque is
controlled and brake is applied with referring vehicle
condition (over steering, under steering) during
cornering.

ESP

® is a registered trademark of Daimler Chrysler AG.

ESP

® Hydraulic Unit / Control Module

Assembly Description

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ESP

® control module is a component of ESP® hydraulic

unit / control module assembly and has the following
functions.

Self-Diagnosis Function
ESP

® control module monitors each input and output

signals. When ESP

® control module detects any

malfunction, some of ABS warning lamp (1), EBD
warning lamp (brake warning lamp) (2), ESP

® warning

lamp (3), SLIP indicator lamp (4), ESP

® OFF lamp (5)

are turned ON and indicate the abnormality to driver.

Sensor

Procedures required calibration

Steering angle sensor

• Power is not supplied to steering angle sensor. (battery and/or fuse is removed.)
• Steering angle sensor is replaced.
• Power is not supplied to ESP

® control module. (battery, fuse and/or connector is

removed.)

• ESP

® hydraulic unit / control module assembly is replaced.

Master cylinder pressure sensor • ESP

® hydraulic unit / control module assembly is removed or replaced.

Yaw rate / G sensor assembly

• Yaw rate / G sensor assembly is removed or replaced.
• ESP

® hydraulic unit / control module assembly is replaced.

Electronic Stability Program: 4F-3

• When ignition switch is turned ON, ABS warning

lamp, EBD warning lamp, ESP

® warning lamp, SLIP

indicator lamp and ESP

® OFF lamp light for 2

seconds to check its circuit.

• When no abnormality is detected (the system is in

good condition), ABS warning lamp, EBD warning
lamp, ESP

® warning lamp, SLIP indicator lamp and

ESP

® OFF lamp turn OFF after 2 seconds.

• When an abnormality in the system is detected, some

of ABS warning lamp, EBD warning lamp (brake
warning lamp), ESP

® warning lamp, SLIP indicator

lamp and/or ESP

® OFF lamp are turned ON and the

area where that abnormality lies is stored in the
memory in ESP

® control module.

Fail-Safe Mode
When ESP

® control module detects abnormality, the

system goes into fail-safe mode. And some of functions
of ABS, TCS, stability control system are shut down. For
details of fail safe mode, refer to “Fail-Safe Table”.

Warning Lamp, Indicator Lamp Description

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There are five types of warning lamp and indicator lamp in instrument cluster, which are controlled by ESP

® control

module. They give warning / indication to driver by changing the modes light ON / blinking / light OFF.

The followings are the condition and operation of warning lamps and indicator lamps.

3

2

1

4

5

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1. ESP

® warning lamp

3. ABS warning lamp

5. ESP

® OFF lamp

2. EBD warning lamp (brake warning lamp)

4. SLIP indicator lamp

1

2

3

4

5

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Warning lamp / Indicator lamp

Condition and operation

ABS warning lamp

If ABS has abnormality, the lamp turns “ON”.

EBD warning lamp (brake warning
lamp)

• If EBD system has abnormality, the lamp turns “ON”.
• If bake fluid level in reservoir is lower than minimum level, the lamp turns “ON”.
• Parking brake switch is ON, the lamp turns “ON”.

ESP

® warning lamp

If ESP

® systems has abnormality, the lamp turns “ON”.

SLIP indicator lamp

• If stability control system and traction control system is active, the lamp blinks

at 5 Hz.

• If Steering angle sensor calibration is incompleted, the lamp blinks at 1 Hz.

4F-4 Electronic Stability Program:

CAN Communication System Description

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Refer to “CAN Communication System Description in Section 1A” for CAN communication system description. ESP

®

control module communicates control data with each control module as follows.

ESP

® Control Module Transmission Data

ESP

® Control Module Reception Data

ESP

® OFF lamp

• If ESP

® OFF switch is turned “ON”, the ESP® OFF lamp light up. When it is

“ON”, TCS and stability control system functions are controlled not to work.
However, when the speed is over 30 km/h (18.5 mph), ESP

® OFF lamp is

turned “OFF” and TCS and stability control system function is back to work
automatically.

• When transfer shift position (if equipped) is in 4L-lock, the ESP

® OFF lamp

light up to indicate engine torque down and stability control system in TCS are
controlled not to activate to increase the driving force.
However, the brake-traction control works through ESP

® OFF lamp light up.

• ESP

® OFF lamp light up to indicate that brake control of traction control

function is controlled not to act if brake pad temperature is over 350

°C (662 °F)

and any of wheel is in wheel spin condition.

Warning lamp / Indicator lamp

Condition and operation

Combination

meter

Transmit

DATA

ESP® control

module

ECM

4WD control

module

(if equipped)

Steering angle

sensor

Torque up request

Torque down request

Wheel speed signal (front right)

Wheel speed signal (front left)

Wheel speed signal (rear right)

Wheel speed signal (rear left)

ESP® system (other than ABS) active

ABS active

ESP® OFF indication ON

ESP® indication ON

ABS indication on

EBD indication on

Steering angle neutral position

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Engine torque signal

Accelerator pedal position

Engine speed

Cruise control signal (if equipped)

Brake pedal switch signal

Transmission gear selector position

Brake fluid level switch signal

Parking brake switch signal

4WD shift position (if equipped)

Steering angle signal

Receive

DATA

ESP® control

module

ECM

4WD control

module

(if equiped)

Steering

angle sensor

TCM (for A/T

model)

BCM

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Electronic Stability Program: 4F-5

CAN Communication System For Electronic Stability Program Description

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There is CAN communication system only for ESP

® control module (1) and yaw rate / G sensor assembly (2).

This CAN communication system is independent from other control modules.

ESP

® communicates control data with yaw rate / G sensor assembly as follows.

ESP

® Transmission Data to Yaw Rate / G Sensor Assembly

• Longitudinal G neutral position
• Lateral G neutral position

ESP

® Reception Data from Yaw Rate / G Sensor Assembly

• Vehicle yaw rate signal
• Vehicle longitudinal G signal
• Vehicle lateral G signal
• Yaw rate / G sensor assembly related malfunction

2

1

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