Auto-Configuration

The Standard TABS-6 module is available only in the 2S/1M ABS configuration and does not use auto-configuration.

For the Premium TABS-6 module, the default ABS configuration is 2S/1M. At power-up, if a Premium ECU detects additional sensors and modulators it will perform an auto-configuration. Auto-configuration only adjusts upward (e.g. 2S/2M Side to a 4S/2M Side configuration).

Additional detected components that do not conform to a legitimate configuration will generate the appropriate faults. If the vehicle begins moving before the new configuration has been accepted, the reconfiguration will not take place at this time.

Default	Additional Components		Auto-Configuration
	Sensors	Modulators
	-	-	2S/1M (Dolly-Axle)

2S/1M	-	1	to 2S/2M (Side)
Dolly Axle	2	1	to 4S/2M (Side)
	2	2	to 4S/3M (Side/Axle)

2S/1M	-	-	2S/1M (Axle)
2S/1M	-	1	to 2S/2M (Axle)
Axle	-	1	to 2S/2M (Axle)
	2	1	to 4S/2M (Axle)

CHART 4 – PREMIUM TABS-6 module AUTO-

CONFIGURATION MATRIX

ODOMETER FUNCTION

Odometer

The TABS-6 module includes an odometer function to provide a means of storing the accumulated mileage of the vehicle. The mileage is computed by utilizing information calculated from the vehicle wheel speeds.

This feature is accurate to within 0.62 miles per power-up and will typically store mileage up to 1,000,000 miles. The mileage can be displayed using PC diagnostics or through blink codes.

Whenever the module is towed using a pre-1997 tractor, the electronic odometer does not function, and the mileage can be considered out-of-calibration.

Trip Counter

The module provides a counter to record the trip mileage. The feature is accessed through PC or handheld diagnostic tools.

Service Interval

The TABS-6 module provides a feature that can be used to indicate a service interval for the trailer. The service interval can be accessed via PC or hand-held diagnostic tools. If configured, the TABS-6 module can flash the indicator lamp when the vehicle is at standstill to indicate when the service interval has been exceeded.

NON-STANDARD TIRE SIZE

The module allows for tire rolling radius and tone ring tooth count parameters to be set for each axle using a diagnostic tool. These adjustments may be necessary for the module to accurately calculate the vehicle velocity and odometer mileage. Wheels of the same axle must be set to the same rolling radius and tone ring tooth count. In most cases, these parameters are set by the trailer OEM and do not need to be adjusted. In the case of a service replacement unit, always check that these parameters are set to match the vehicle.

The tire-rolling radius is defaulted to 500 revs/mile and can be adjusted from 300 to 700 revolutions per mile. Refer to the manufacturer’s tire specification for correct values.

Tone ring tooth count is defaulted to 100 teeth and can be set to 60 to 140 teeth.

diagnostic trouble code DETECTION

The TABS-6 module contains self-testing diagnostic circuitry that monitors the ABS components and wiring.

When the module senses an erroneous system condition, it activates the external trailer-mounted ABS indicator lamp, disables all or part of the affected ABS functions, and it stores the fault code in memory, even when the power is removed. The module also uses PLC communications to send the system status to the towing vehicle.

For some trouble codes, the TABS-6 module will automatically reset (“self-heal”) the active diagnostic trouble code when the error is corrected (e.g. when a wheel speed sensor is re-aligned). However, repeated occurrences of a given trouble code can cause the code to “latch” - that is, be retained as active, even if the condition is only intermittent. Once the code is latched, a manual reset will be necessary. Technicians can use these latched codes to assist them in troubleshooting intermittent errors. After the problem is repaired, trouble codes can be reset using blink code diagnostics or with a diagnostic tool.

When a trouble code self-heals or is manually reset, the code remains stored in the ECU memory. This trouble code history can be retrieved using blink code diagnostics or with a diagnostic tool.