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Traction-Control Information from Vehicle Manufacturers

The Bureau of Automotive Repair asked all known manufacturers of vehicles sold in California to provide information regarding compatibility of their vehicles with single-axle dynamometers. Not all vehicle manufacturers responded. This page presents information from those that did.

All-Wheel Drive is incompatible with single-axle dynamometers. Click on All-Wheel drive for manufacturers' information on that subject. Traction control may also be incompatible with single-axle dynamometers.

Placing any non-compatible vehicle on a single-axle dynamometer could result in safety hazards to technicians and in damage to the vehicle. Vehicles which use all-wheel drive or traction control may not be clearly marked. Use common sense and take all necessary precautions when placing any vehicle on the dynamometer. 

The following table includes pertinent information with regard to traction control. It is only valid for vehicles built before 2000, unless other model-years are specifically stated for that manufacturer.

Vehicle Make
Comments About Traction Control
Acura
All 1991-2002 NSX, 1993-1995 Legend Coupe LS, 1994-1995 Legend Sedan GS, 1996-1997 3.2TL (Premium Package), 1999-2002 3.2TL, and 1996-2002 3.5RL (Premium Package) have traction control. The switch defaults to "ON" and is located on the dash.
Although Acura offers the "Torque-On-Demand" (TOD) traction control system on the 1998-1999 "SLX 4WD", TOD is engageable only during 4WD operation. It will not affect operation during dyno testing in 2WD mode.
Alfa-Romeo
All Alfa-Romeo vehicles are sold in the US without traction control.
 
Audi
Vehicles with ASR traction control can be tested. ASR must be set to "non-functional". ASR switch is located on the instrument panel. Red warning light illuminates with system disabled. See the Audi table for traction control specifics on Audi vehicles.
 
BMW
See the BMW table, which indicates traction control by engine family (1988-up). All BMW traction control systems are switchable. This can be easily done using the console mounted on/off switch. Please be aware that this procedure will illuminate the ABS and ASC warning lamps on the instrument cluster. This is a normal function. The ABS/ASC systems will be immobilized until the warning lamps are switched off. To switch the lamps off, the engine must be shut off for 30 seconds or more and restarted. The lamps will go out when the vehicle speed exceeds 8 MPH. Disengagement of the traction control system does not affect engine control mapping.
 
Buick
1995-1998 LeSabre has optional traction control and it can be disabled at the instrument panel. 1995-1998 Park Avenue has optional traction control and it can be disabled at either the instrument panel or the shift lever. 1997-1998 Park Avenue Ultra and 1996-1998 Skylark has standard traction control and it can be disabled at the shift lever. 1997-1998 Regal has standard traction control and it can be disabled at the console. 1995-1998 Riviera has standard traction control and it can be disabled at the instrument panel.
 
Cadillac
1997-1998 Catera and 1998 Seville have standard traction control and it can be disabled at the console. 1995-1998 DeVille and Eldorado, 1995-1996 Fleetwood, and 1995-1997 Seville have standard traction control and it can be disabled in the glove box.
 
Chevrolet
See the Chevrolet table for traction control specifics on 1995-1998 Chevrolet vehicles.
 
Chrysler
Optional on the following models: 1993-1996 New Yorker, 1993-1998 Concorde, 1993-1997 LHS, 1997 "300", 1998 Sebring Convertible, and 1997-1998 Town and Country. The traction control switch is to the right of the steering wheel. The switch must be turned off every time the engine is restarted, prior to dyno testing.
 
Dodge
Optional on the following models: 1993-1998 Intrepid, 1997-1998 Caravan and Grand Caravan. The traction control switch is to the right of the steering wheel. The switch must be turned off every time the engine is restarted, prior to dyno testing.
 
Eagle
Optional on the 1993-1997 Vision. The traction control switch is to the right of the steering wheel. The switch must be turned off every time the engine is restarted, prior to dyno testing.
 
Ferrari
All Ferrari vehicles are sold in the US without traction control.
 
Fiat
All Fiat vehicles are sold in the US without traction control.
 
Ford
Police specification Crown Victorias have traction control and may not be tested on a single-axle dynamometer.
 
Honda
The 1999-2000 Honda Odyssey EX, 2001-2002 Honda Odyssey LX and EX and 2001-2002 Accord V6 have traction control. The switch defaults to "ON" and is located on the dash.
Infinity
Traction Control standard on 1997-1998 "Q45". The switch is on the dash, left of the steering wheel. TC defaults to ON. 
Traction Control optional on 1991-1996 "Q45". The switch is on the console. TC defaults to ON.
 
Isuzu
Although Isuzu offers the "Torque-On-Demand" (TOD) traction control system on the 1998 Trooper, TOD is engageable only during 4WD operation. It will not affect operation during dyno testing.
 
Jaguar
Traction control is optional and switchable for: sedan (XJ6) 1995-up and XK8 1997-up. Switch is located on center facia panel.
 
Land Rover
Range Rover vehicles sold in the US since 1993 are equipped with traction control. It operates automatically at speeds less than 25 MPH and is not disengageable.
 
Lamborghini
Lamborghini offered traction control as an option on some vehicles 1994-present. All Lamborghini traction control systems are disengageable.
 
Lexus
The 2000-2001 ES300, GS300, GS400, and LS400 all have traction control which can be disabled for ASM testing. On the GS300, GS400, and LS400, use the "VSC off" switch.
 
Mazda
Mazda says traction control on the 1995-1999 Millenia is "either optional or disengageable".
 
Mitsubishi
Some 1996 Diamantes were sold with disengageable traction control; which was not offered after 1996.
 
Nissan
All Nissan vehicles are sold in the US without traction control.
Oldsmobile
See the Oldsmobile table for traction control specifics on 1995-1998 Oldsmobile vehicles.
 
Plymouth
Optional on the 1997 Voyager and Grand Voyager. The traction control switch is to the right of the steering wheel. The switch must be turned off every time the engine is restarted, prior to dyno testing.
 
Pontiac
See the Pontiac table for traction control specifics on 1995-1998 Pontiac vehicles.
 
Porsche
The 1997-1999 "Boxster" and the 1999-2000 "911 Carrera/Carrera-4" have traction control. It is standard equipment on those models (not optional). It is optional on the 2000 "Boxster/Boxster-S".
Porsche traction control can be disengaged, but disengaging affects engine control mapping. Therefore, if an equipped vehicle fails an ASM inspection (traction control OFF), send motorist to the Referee.
 
Saab
See the Saab table for traction control specifics on 1992-1999 Saab vehicles.
 
Saturn
The following models have optional traction control that is disengageable at the instrument panel:
1995 SC/SL/SW with ABS and auto trans, 1996-1998 SC/SL/SW with ABS.
 
Subaru
Subaru's two-wheel drive 1995 Legacy Sedan, 1995 Legacy Station Wagon and 1996 Legacy Sedan may be equipped with the Subaru Traction Control System (TCS) as an option. Prior to dyno testing, the TCS switch on the dash must be placed in the "off" position after starting the engine.
 
Suzuki
All Suzuki vehicles are sold in the US without traction control.
 
Toyota
The 2000 4Runner 2WD, 2000-2001 4Runner 4WD, and the 2001 Sequoia 4WD are not testable on a dynamometer due to non-switchable traction control. The "Center Differential Lock" or "VSC OFF" switches do not deactivate traction control. There is no combination of switch setting and 2WD/4WD selector position that will deactivate traction control on these models.

The 2001 4Runner 2WD and 2001 Sequoia 2WD may be tested on a dynamometer after using the "TRAC OFF" switch on the dashboard. TRAC is activated automatically when the front wheels exceed 19 mph, and will not occur on a single-axle dynamometer.

2001 Prius hybrid-electric vehicles must be I/M tested at the Referee.
 
Volkswagen
Vehicles with ASR traction control can be tested. ASR must be set to "non-functional". ASR switch is located on the instrument panel. Red warning light illuminates with system disabled. See the Volkswagen table for traction control specifics on Volkwagen vehicles.
 
Volvo
All Volvo vehicles which were optionally equipped with Volvo's "TRACS" system may be disengaged by a switch on the dash panel.