Electronic Stability Programme (ESP)* - Chrysler Academy

Electronic Stability Programme (ESP)*
2008 MY Availability
Dodge: Caliber, Avenger, Charger, Nitro, Durango, Ram 1500
Regular and Quad Cab ®
Chrysler: Crossfire, Crossfire Roadster, Sebring, Sebring Cabrio, 300C,
Jeep ®
:
Selling Tips
300C Touring, Grand Voyager
Compass, Patriot, Cherokee, Grand Cherokee,Commander,
Wrangler
Electronic Stability Programme (ESP) is an electronic system that
compares the driver’s intended course with the actual course the vehicle
is traveling.
When ESP detects the loss of traction, or that the vehicle’s path differs
from the driver’s input, the system compensates for differences by
automatically helping the vehicle regain manoeuvrability and stability.
ESP is especially helpful in maintaining control on slippery surfaces or in
driving conditions with low traction.
During Demonstration
Certain components of ESP are always operating, even if the ESP shutoff
switch is in the OFF position.
At Delivery
ESP cannot overcome the laws of physics or careless driving actions.
The driver is ultimately responsible for the vehicle’s control and safety.
Always wear your seat belt.
Point out the location of the ESP switch.
Demonstrate how to turn off ESP, and explain situations where a
customer may need to do so. Remember to switch ESP back on.
* No system, no matter how sophisticated, can repeal the laws of physics or overcome careless driving
actions. Performance is limited by available traction, which snow, ice and other conditions can affect. When
the ESP warning lamp in the speedometer flashes, the driver needs to use less throttle and adapt speed
and driving behaviour to prevailing road conditions. Always drive carefully, consistent with conditions.
Always wear your seat belt.
ESP can be switched off to improve a vehicle’s traction when driving with
snow chains, or starting off in deep snow, sand, or gravel. The shutoff
switch most likely will be used in off-road situations by off-road
enthusiasts, or in the case of SRT vehicles, under high-performance
driving situations in a closed course.
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Operating Instructions
ESP is always active unless manually switched to Partial- or Fully Off mode by
the driver via a switch in the instrument panel. For most driving conditions, ESP
should remain engaged.
There are certain situations when it may be advantageous to partially or fully
deactivate ESP. These situations include when starting off in deep snow, sand,
or gravel, or when driving with snow chains. SRT drivers may also wish to
engage Partial- or Fully Off ESP modes so there is less ESP intervention during
high-performance driving or extreme manoeuvres.
Switching off ESP is done by pressing the ESP switch once to engage the
Partial Off mode, or by pressing and holding the ESP switch for five seconds
to engage the Fully Off mode. When Partial- or Fully Off mode is engaged, the
ESP warning light will be continuously illuminated. See the “ESP Modes” section
of this document for information on which components of ESP are affected when
switching to Partial- or Fully Off mode.
Make your customer aware that when ESP is in the Partial- or Fully Off mode,
the full benefits of ESP will not be available. ESP should only be deactivated
when necessary.
How It Works
ESP is comprised primarily of three systems: the Antilock Brake System (ABS),
the Traction Control System (TCS) and the heart of ESP, the Yaw Control
Stability System.
Antilock Brake System (ABS)
The antilock brake system (ABS) is designed to aid the driver in maintaining
vehicle control under adverse braking conditions. The system modulates
hydraulic pressure to help prevent wheel lockup and help avoid skidding on
slippery surfaces.
Traction Control System (TCS)
The traction control system (TCS) monitors the amount of wheel spin of each
of the driven wheels. If wheel spin is detected, brake pressure is applied
to the slipping wheel(s) and engine power is reduced to provide enhanced
acceleration and stability. The Traction Control System functions similarly to a
limited-slip differential and controls the wheel spin across a driven axle. If one
wheel on a driven axle is spinning faster than the other, the system will apply
the brake and slow down that wheel. This allows more engine torque to be
applied to a non-spinning wheel.
ESP Switch ESP Warning Light
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YCSS (ESP)
The Yaw Control Stability System (YCSS) is a major component of ESP.
Yaw is the movement or spin of an object around its vertical axis. When
approaching a turn, the YCSS determines how far a vehicle is tracking off its
axis. Data is delivered to a microcomputer that compares the data with wheel
speed, steering angle and accelerator position. If too much yaw is sensed, the
appropriate braking force is applied to slow down the vehicle and help it travel
where it is being steered.
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Electronic Roll Mitigation (ERM)
2008 MY Availability
Dodge: Nitro, Durango, Ram 1500 Regular and Quad Cab ®
Jeep ®
: Compass, Patriot, Cherokee (KK), Grand Cherokee,
Commander, Wrangler
Selling Tips
Electronic Roll Mitigation, or ERM, enhances ESP by sensing the
potential for wheel lift and helping to reduce the likelihood of a vehicle
side rollover.
ERM determines when a vehicle is in a potential rollover condition and
applies the appropriate braking force to reduce the likelihood that such an
event will occur.
During Demonstration
Explain to customers that many factors, such as vehicle loading, road
conditions and driving conditions, influence the chance that wheel lift or
rollover may occur.
At Delivery
ERM cannot prevent wheel lift caused by a vehicle leaving the roadway
or when it slides into a kerb or another object or vehicle.
The capabilities of an ERM-equipped vehicle must never be exploited in a
reckless or dangerous manner which could jeopardise the user’s or
others’ safety.
Operating Instructions
ERM is always active unless ESP is manually switched to the Fully Off mode by
the driver (Fully Off mode only available on select vehicles).
How It Works
When a vehicle makes a sudden turn, the outside wheels take the majority
of the cornering load. If the lateral force is high enough, the vehicle may start
to tip. ERM anticipates the potential for rollover based on steering angle and
speed and rapidly applies the brakes with a high burst of pressure to cause
the outside tyre to slip. This reduces the lateral force and transfers some of the
weight back over the inside tyres, which helps the driver to prevent a rollover
and to keep all four wheels solidly on the ground.
Explain that ERM helps keep all four wheels solidly on the ground in
order to reduce the chance of a rollover.
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Trailer Sway Control (TSC)
2008 MY Availability
Dodge: Nitro, Durango, Ram 1500 Regular and Quad Cab ®
Jeep ®
: Cherokee, Grand Cherokee, Commander
Selling Tips
Trailer Sway Control, or TSC, is an exciting enhancement to the
Electronic Stability Programme.
TSC improves vehicle stability by compensating for alternating effects on
a vehicle not caused by steering input, such as strong wind or an
improperly loaded trailer.
During Demonstration
Customers who tow trailers benefit with added control over trailer sway.
With TSC, towing is easier and safer than ever by helping control
trailer sway.
At Delivery
The ESP function lamp will flash when TSC activates.
Be sure to adapt your speed and driving to the prevailing road conditions.
TSC cannot stop all trailers from swaying.
Though the vehicle is equipped with TSC, be sure to properly balance
trailer loads.
Operating Instructions
TSC is always active unless manually switched to Partial- or Fully Off mode by
the driver via a switch in the instrument panel. TSC is not available when the
ESP system is in the Partial-Off or Fully Off mode. TSC activates once the yaw
sensor recognises unique vehicle motion with no steering input.
How It Works
The ESP yaw sensor recognises when there are alternating forces on the
vehicle that aren’t caused by steering input. This sway could be caused by
strong wind gusts or an improperly loaded trailer. The ESP yaw sensor can
recognise the unique increasing amplitude of a swaying trailer. It will then
use brake pressure on alternating
wheels to help stabilise the vehicle’s
path and, if necessary, adjust the
electronic throttle to help bring the
vehicle and trailer under control.
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Hill Descent Control (HDC)
2008 MY Availability
Jeep ®
: Cherokee, Grand Cherokee, Commander
Selling Tips
For added off-road safety and control on 4x4 models, HDC detects a
steep decline and automatically applies brake pressure for a consistent
descent speed.
HDC is capable of determining when the vehicle is on a grade or on level
terrain via input from the fore/aft acceleration sensor in the ESP sensor
module.
During Demonstration
Explain to customers that HDC helps provide added off-road safety and
control by automatically braking during steep and slippery descents,
allowing the driver to focus on steering.
At Delivery
Show your customer the system active indicator icon in instrument
cluster.
Show your customer the HDC button (if equipped) and review operating
instructions (on the following page).
As the vehicle crests a hill, the brakes will automatically begin to pulsate
and adjust the brake pressure to maintain the vehicle at a set speed of
less than eight km/h (five mph).
The vehicle speed can be lowered by applying the brake or raised by
applying the accelerator pedal to provide a safe descent down a hill.
Once the driver releases the brake or the throttle, vehicle speed will ramp
up or down to the HDC limit speed.
Should a driver decide to back down a hill, HDC will also back the vehicle
down at a controlled rate of speed.
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Operating Instructions
HDC operates when the transfer case is in 4WD LO or Off-Road mode, and
the shifter is in Low or Reverse. Depending on the vehicle, a push of the HDC
button may be required to engage HDC.
An icon will illuminate on the instrument cluster,
indicating the HDC is engaged.
How It Works
HDC is engaged when the transfer case is in 4WD LO or Off-Road Mode, and
the transmission shifter is in Low or Reverse.
During a steep decline, HDC automatically modulates the brakes to help
maintain a safe and controlled vehicle speed of less than eight km/h (five mph)
to assist in steep and slippery descents.
Hill Descent
Control Switch
The HDC indicator lamp will blink if:
• The vehicle is exceeding the maximum
effective speed for HDC (50 km/h or 31 mph).
• The vehicle is not in 4LO or off-road mode, and
the gear selector is not in low or reverse.
HDC only activates when the vehicle is traveling on a decline and not level
ground.
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Hill Start Assist
2008 MY Availability
Dodge: Ram 1500 Regular and Quad Cab ®
Jeep ®
: Cherokee, Grand Cherokee, Commander
Selling Tips
An important enhancement to the Electronic Stability Programme is Hill
Start Assist.
Hill Start Assist helps prevent vehicle rollback on a steep grade when the
driver is transitioning from the brake to the accelerator.
This is especially beneficial on vehicles with manual transmissions.
During Demonstration
Point out to your customers the added driver ease and safety that Hill
Start Assist provides by helping prevent vehicle rollback on steep grades.
At Delivery
The system will hold brake pressure for approximately two seconds upon
the driver’s release of the brake pedal.
The duration can be lengthened as long as the vehicle has not driven off
and the driver’s foot is on the throttle.
Operating Instructions
No operations necessary. The driver does not need to do anything to activate
Hill Start Assist; it is always active.
How It Works
Hill Start Assist automatically keeps the brakes applied briefly when the driver
releases the brake pedal. This helps prevent a roll back on a grade while the
driver transitions from the brake pedal to the accelerator pedal. Hill Start Assist
can be an added convenience when towing a boat trailer away from a launch.
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ESP: Modes
Selling Tips
ESP can be disengaged by the driver, causing less ESP intervention,
placing more vehicle control in the driver’s hands.
SRT drivers and off-road enthusiasts may wish to partially disengage the
system for more spirited driving or extreme manoeuvres.
At Delivery
There are three modes of activation to meet various driver needs:
Fully
ON, Partially OFF and Fully OFF. These modes vary by vehicle type.
See the chart at the end of this section for more information.
Explain which systems are enabled/disabled, depending on the vehicle,
as explained in the operating instructions.
During Demonstration
Explain to SRT drivers, who may want to experience more dynamic
manoeuvres, that ESP can be partially or fully disabled to allow for more
driver control and spirited driving.
Operating Instructions
Operation varies not only by vehicle type but also by application. Review the
following How It Works section for a thorough explanation you can use
with customers.
For example, driving enthusiasts may want LESS ESP intervention,
allowing for high-performance manoeuvres requiring additional wheel
slip, such as high-speed cornering or rapid acceleration from a standstill.
Explain to off-road enthusiasts that ESP can be partially or fully disabled
for driving untamed roads or in rugged, severe situations in 4x4 settings.
LESS ESP intervention may be valuable in situations where some wheel
slip is desirable.
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How It Works
The availability of the Fully ON, Partially OFF and Fully OFF modes varies by
vehicle type: normal, SRT and select 4x4 vehicles.
ESP Modes: Vehicle Categories
Normal
Vehicles
SRT
Vehicles
Select
4x4 Vehicles
Fully ON Yes Yes Yes
Partially OFF Yes Yes Yes
Fully OFF No Yes* Yes
*Exception: Grand Cherokee SRT8
ESP Modes: Operation
Antilock
Brake
System
Traction Control
Low-
Speed
(Brake
Only)
All-Speed
(Engine &
Brake)
ESP (Yaw
Control
Stability
System)
Electronic
Roll
Mitigation
Fully ON ON ON ON ON ON
Partially
OFF
Fully
OFF
ON
ON
Modified
Threshold
Modified
Threshold
ON
ON ON Disabled Disabled Disabled
Normal Vehicles
Normal vehicles consist of Chrysler and Dodge automobiles and 2WD SUVs.
They feature two of the modes: Fully ON… and Partially OFF. ESP Fully OFF
mode would not typically be offered.
SRT Vehicles
SRT models… as well as police vehicles… feature all three Modes: Fully ON…
Partially OFF… and Fully OFF. One exception is Jeep Grand Cherokee SRT8, ®
which does not offer a Fully OFF ESP mode.
Fully On
Fully engaged, active ESP means all components are active. This is called
the Fully ON mode and should be used for normal driving. The Fully ON mode
completely activates the Antilock Brake System, Low-Speed Traction Control,
All-Speed Traction Control, ESP Yaw Control Stability System, and Electronic
Roll Mitigation. By default, whenever the vehicle is started, ESP is Fully ON or
fully active.
4x4 Vehicles
Select 4x4 vehicles also feature all three modes.
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ESP Switch
ESP Warning Light
Partially OFF
The Partially OFF mode provides less automatic control
by modifying the all-speed traction control and ESP yaw
control thresholds. This will allow for limited wheel slip
for high-performance driving situations, when stuck in
deep snow, or when driving off-road.
Fully OFF
The Fully OFF mode completely disables all-speed
traction control, ESP Yaw Control Stability System
and Electronic Roll Mitigation. This mode is reserved
for high-performance vehicles and off-road-capable
vehicles when in 4WD mode.
Note that regardless of the mode, the antilock brake
system and low-speed traction control remain
active all the time.
Modified Vehicle ESP
A special ESP application exists for owners
of 2007 and later Jeep ®
Wranglers who
wish to modify their vehicles by raising the
vehicle and adding larger wheels and tyres.
Modifying the vehicle in this way may cause
ESP to behave abnormally. The Modified
Vehicle ESP application will stay in Fully OFF
mode all the time, disabling all ESP functions
with the exception of ABS and low-speed traction control. ESP will not revert to
“on” with the key cycle.
Unlike the other vehicle types, ESP for a modified Jeep ®
Wrangler requires
specific procedures by the Service Department and customer to turn ESP Fully
OFF and then Fully ON again.
Tell your customers to drive their modified vehicle before deciding to deactivate
ESP. It’s important that they see how ESP will react with the new modifications.
Only then should they determine whether or not turning off ESP would be
beneficial. It’s also important to recommend that if a customer DOES wish to
turn off ESP, the customer follow the specified procedure.
SAFETY NOTE: Some customers may choose to remove the ESP fuse from
the system to disable ESP. Removing the fuse will also disable ABS and lowspeed
traction control. This improper procedure may negatively affect vehicle
safety and should not be done.
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ESP Functions by Model
Chrysler Models
2-Mode
ESP
3-Mode
ESP
Electronic Roll
Mitigation
Trailer Sway
Control
Hill Descent
Control
Hill Start
Assist
Jeep Models
2-Mode
ESP
3-Mode
ESP
Electronic Roll
Mitigation
Trailer Sway
Control
Hill Descent
Control
Hill Start
Assist
2008 MY 300C
(non-SRT8)
•
2008 MY Commander
4WD
• • • • •
2008 MY 300C SRT8 •
2008 MY Crossfire •
2008 MY Crossfire •
SRT6
2008 MY PT Cruiser No ESP
2008 MY PT Cruiser
No ESP
Cabrio
2008 MY Sebring •
2008 MY Sebring
•
Cabrio
2008 MY Grand
•
Voyager
2008 MY Compass • •
4WD
2008 MY Grand
• • • • •
Cherokee 4WD
(non-SRT8)
2008 MY Grand
• •
Cherokee SRT8
2008 MY Cherokee •
2008 MY Cherokee • • •
2WD
2008 MY Cherokee
• • • •
4WD
2008 MY Patriot 4WD • •
2008 MY Wrangler
2WD
• •
2008 MY Wrangler
4WD
• •
4

2-Mode
ESP
Dodge Models
2008 MY Avenger •
2008 MY Caliber •
2008 MY Caliber SRT4 •
2007 MY Charger •
(non-SRT8)
3-Mode
ESP
Electronic Roll
Mitigation
Trailer Sway
Control
Hill Descent
Control
Hill Start
Assist
2007 MY Charger
•
SRT8
2007 MY Charger
•
Police Edition
2008 MY Charger •
Police Edition
2007 MY Dakota No ESP
2008 MY Durango • • •
2008 MY Nitro • • •
2007 MY Ram 1500 2WD • • • •
2007 MY Ram 1500 4WD • • • •
2007 MY Ram
No ESP
2500/3500
2008 MY Viper No ESP
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