BENDIX TABS-6 TRAILER ABS MODULE Manual

BENDIX TABS-6 TRAILER ABS MODULE Manual

Trailer abs module
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Bendix
TABS-6 Trailer ABS Module
®
ECU Cover
(Sealed)
Integrated
Modulator
Relay Valve
3/4" NPT
Supply Port
Four (4) 3/8" NPT
Delivery Ports
(To Brake Chambers)
FIGURE 1 - TABS-6 STAndARd And PREmIUm mOdULES

INTRODUCTION

The Bendix
TABS-6 module is an integrated trailer ABS
®
controller and modulator for air-braked heavy-duty trailers,
semi-trailers and dollies. The module acts as a relay valve
during normal braking, but during ABS events, it will intervene
to help improve stability. All modules include an Electronic
Control Unit (ECU) and Modulator Relay Valve (MRV) which are
integrated into a single self-contained 2S/1M (two-sensor, one
modulator) trailer ABS unit. The Premium TABS-6 module is
auto-configurable to control more sensors and modulators (up to
4S/3M) from its default 2S/1M.
Bendix
TABS-6 modules also feature:
®
• Internal electrical connections to the primary MRV,
eliminating the need for external pigtail harnesses.
• Optional mounting to the service reservoir or to the chassis,
without additional brackets.
• Blink code diagnostics and support for advanced diagnostic
tools.
• Support for Power Line Carrier (PLC) communication to the
towing vehicle.
• A pressure equalizing valve in the sealed ECU housing to
give improved protection from water, etc.
• A locking dust cover to provide additional electrical connector
and cable protection.
• A serviceable nylon filter to help prevent foreign material
from entering the control port.
3/8" NPT Control
Port with
Integral Filter
ECU Connector
Cover
(Removable)
Wheel Speed
Connectors
Through-holes
for Frame
(Chassis)
Mounting
Part Number
Label
(See Page 31)
ECU Pin-out Label
(See Page 31)
Sensor
To Remove Cover
Slide Lock Tab

TABLE OF CONTENTS

General System Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safe Maintenance Practices . . . . . . . . . . . . . . . . . . .2
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Mounting Configurations. . . . . . . . . . . . . . . . . . . . . .2
Wiring Harness (Pigtail) . . . . . . . . . . . . . . . . . . . . . .3
Power and Ground . . . . . . . . . . . . . . . . . . . . . . . . . .4
ABS Indicator Lamp . . . . . . . . . . . . . . . . . . . . . . . . .4
Wheel Speed Sensors . . . . . . . . . . . . . . . . . . . . . . .5
ABS Modulator Valve . . . . . . . . . . . . . . . . 5
J1708/J1587 Diagnostic Link . . . . . . . . . . . . . . . . . .6
Auxiliary I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Program . . . . . . . . . . . . . . . . . . . . . . . . .6
Customer Scratch Pad . . . . . . . . . . . . . . . . . . . . . . .6
Power-up Sequence . . . . . . . . . . . . . . . . . . . . . . . . .6
ABS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Auto-Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .8
Odometer Function . . . . . . . . . . . . . . . . . . . . . . . . . .8
Non-standard Tire Size . . . . . . . . . . . . . . . . . . . . . . .8
Diagnostic Trouble Code Detection . . . . . . . . . . . . . 8
Blink Code Diagnostics. . . . . . . . . . . . . . . . . . . . . . .9
Bendix ABS Diagnostic Tools . . . . . . . . . . . . . . . . . 13
Contacting Bendix. . . . . . . . . . . . . . . . . . . . . . . . . .14
Servicing the Module . . . . . . . . . . . . . . . . . . . . . . .14
Removing the Module. . . . . . . . . . . . . . . . . . . . . . .14
Reinstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Leakage And Operational Tests . . . . . . . . . . . . . . . 15
ABS Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 17-27
The ECU Connector
Varies for Standard and
Premium - See Chart
The Standard TABS-6
Module uses a
5-Pin Connector
The Premium TABS-6
Module uses an
18-Pin Connector
PAGE


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Table of Contents
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Summary of Contents for BENDIX TABS-6 TRAILER ABS MODULE

  • Page 1: Table Of Contents

    Contacting Bendix......14 Servicing the Module ..... . .14 •...
  • Page 2: Safe Maintenance Practices

    ™ PERSOnAL InJURY OR dEATH: depending on configuration). Each sensor is installed when working on or around a vehicle, the following with a Bendix Sensor Clamping Sleeve. See page 5. general precautions should be observed at all times: • Bendix...
  • Page 3: Wiring Harness (Pigtail)

    Pigtail harness are weather sealed at the connector interface and are clearly labeled for proper installation. Because of the over-molded design of the TABS-6 module wiring harnesses, Bendix recommends that the complete harness be replaced if damage or corrosion occurs.
  • Page 4: Power And Ground

    FIGURE 5 - TRAILER-mOUnTEd ABS IndICATOR LAmP ECU ignition power, ground and data information. Remote ABS INDICATOR LAMP diagnostic cables are available from Bendix to provide a standard J1708/J1587 diagnostic port at the side of the Trailer-mounted Lamp trailer.
  • Page 5: Wheel Speed Sensors

    Straight Speed Sensors The BR9235 MRV is available in both tank and bracket ™ mounting styles. FIGURE 6 - BEndIx WS-24 WHEEL SPEEd SEnSORS ® ™ 1. For increased corrosion protection we recommend 3-Pin Modulator that a high-temperature rated silicon- or lithium-based...
  • Page 6: J1708/J1587 Diagnostic Link

    J708/J587 DIAGNOSTIC LINK SAE J1587 diagnostics and SAE J2497 PLC data links. The Premium TABS-6 module provides a J1708/J1587 Contact your Bendix Account Manager to discuss an ABS diagnostic link with data and power to communicate with Flex program for your vehicle(s).
  • Page 7: Abs Operation

    braking pressure at the wheel ends. The ECU is able to pump the brakes on individual wheels (or pairs of wheels), ABS System Power Application independently, and with greater speed and accuracy than Status Indicators a driver. 2.0 2.5 3.0 (sec.) Axle Control Trailer-mounted ABS Indicator Light...
  • Page 8: Auto-Configuration

    AUTO-CONFIGURATION Service Interval The TABS-6 module provides a feature that can be used The Standard TABS-6 module is available only in the 2S/1M to indicate a service interval for the trailer. The service ABS configuration and does not use auto-configuration. interval can be accessed via PC or hand-held diagnostic For the Premium TABS-6 module, the default ABS tools.
  • Page 9: Blink Code Diagnostics

    PARTIAL ABS SHUTDOwN Wait until after the modulator chuff test before activating the brake light power. Following a single display of all Depending on the trouble code detected, the ABS ECU available messages, the ABS indicator lamp will remain on partly or completely disables the ABS functionality.
  • Page 10: Resetting Abs Configurations

    Display Configuration Display Odometer Mileage To check the ABS configuration, apply ignition power To display the trailer odometer mileage, apply ignition and depress / release the brake pedal 6 times within 15 power and depress / release the brake pedal 7 times within seconds.
  • Page 11 Diagnostic Trouble Codes (DTCs) (continued) Fault Description Repair Information J1587 J1587 Digit Digit (SID) (FMI) POWER Over-voltage • Power supply diagnostic trouble code. Go to Section F, page 28. Low-voltage • Power supply diagnostic trouble code. Go to Section F, page 28. Excessive power line resistance •...
  • Page 12 Diagnostic Trouble Codes (DTCs) (continued) Fault Description Repair Information J1587 J1587 Digit Digit (SID) (FMI) J1587 DIAgNOSTIC J1587 diagnostics shorted or open • Check for corroded/damaged wiring or connectors 3, 4, 5 between the ECU and J1587 Diagnostic. or 12 •...
  • Page 13: Bendix Abs Diagnostic Tools

    ™ • Retrieve event history Bendix Trailer ABS systems and Bendix makes no claims ® for its operation and/or usability with other brands of trailer • Clear inactive faults and event history ABS.
  • Page 14: Contacting Bendix

    The Bendix on-line contacts directory will make it easy for you to find the Bendix contacts you need. From this page, you can navigate to technical support contacts, FIGURE 18 - TRdU TOOL LEd LOCATIOnS ™...
  • Page 15: Servicing The Module

    MC-12 or MC-30 controller pigtail ™ ™ • What Bendix service data literature do you have or harness. need? 2. Remove all air hoses and plugs connected to the unit. SERVICING THE TABS-6 MODULE 3. Remove the MC-12...
  • Page 16: Leakage And Operational Tests

    Bendix provides over-molded versions of the TABS-6 before reconnecting. wiring harness and Bendix recommends that the complete harness be replaced if corrosion or damage occurs. 4. The new TABS-6 module may need to be reconfigured for proper operation.
  • Page 17: Troubleshooting

    Troubleshooting: Electrical Schematics FIGURE 20 - STAndARd TABS-6 mOdULE (5-PIn ECU COnnECTOR) ELECTRICAL SCHEmATIC - 2S/1m 7-WAY SAE J560 CONNECTOR SENSOR RIGHT SR (+) SENSOR RIGHT SR SENSOR RIGHT SR (-) GROUND IGNITION VOLTAGE BRAKE LAMP VOLTAGE ABS WARNING LAMP (AUX7) SENSOR ADD.
  • Page 18: System Schematics

    Troubleshooting: System Schematics 2S/1M - AXLE ® Bendix WS-24™ Right - CONTROL Wheel Speed A Brake “Curb-Side” Light Power Sensor "SR" B Ignition Power C NC D Warning Lamp E Ground Trailer Trailer ABS 5-PIN Chassis Pigtail CONNECTOR Harness Harness...
  • Page 19 WS Sensor "SL" Installation Guidelines for the TABS-6 2S/2M Axle ABS Configuration: o MOD1 (TABS-6 ABS Unit) controls the left “road-side” wheel(s) of a primary axle(s). o MOD2 ( Bendix BR9235 Modulator Unit) controls the wheels of an additional axle(s). ®...
  • Page 20 "SAL" "SL" Installation Guidelines for the TABS-6 4S/2M Axle ABS Configuration: o MOD1 (TABS-6 ABS Unit) controls the left “road-side” wheel(s) of a primary axle(s). o MOD2 (Bendix BR9235 Modulator Unit) controls the wheels of an additional axle(s). ® ™...
  • Page 21 "SL" Installation Guidelines for the TABS-6 4S/3M Side/Axle ABS Configuration: o MOD1 (TABS-6 ABS Unit) controls the left “road-side” wheel(s) of a primary axle(s). o MOD2 (Bendix BR9235 Modulator Unit) controls the right “curb-side” wheel(s) of a primary axle(s). ®...
  • Page 22: Troubleshooting Flowcharts

    Troubleshooting Flowcharts Diagnostic trouble code information can be retrieved from to make electrical measurements, always begin by taking the TABS-6 module by using blink code diagnostics, or a voltage and resistance measurements at the 5 or 18-pin diagnostic tool. The following troubleshooting flow charts ECU pigtail harness connector.
  • Page 23 SECTION A: (POwER-UP SEQUENCE) TRAILER-MOUNTED ABS INDICATOR LAMP...
  • Page 24 SECTION B: (POwER-UP SEQUENCE) DASH-MOUNTED ABS INDICATOR LAMP...
  • Page 25 SECTION C: DIAGNOSTIC TROUBLE CODE (DTC) BLINK CODE QUICK REFERENCE 1st Blink Code 2nd Blink Code Code Location Code Description Repair Information No Diagnostic Trouble Codes • System fully operational ‑ no faults detected Sensor SL Sensor signal valid ‑ large air gap •...
  • Page 26 As an example: 152,431 miles will be while a magnet is held in place at the displayed as: RESET location near the “B” in Bendix. 152 (x1000) ... or 1 blink (pause), 5 When held for less than 6 seconds, the blinks (pause), 2 blinks.
  • Page 27 SECTION E: TROUBLESHOOTING THE TRAILER-MOUNTED ABS INDICATOR LAMP CIRCUITRY Looking into Looking into Premium Standard TABS- TABS-6 Module Wire 6 Module Wire Harness (Pin 5 ABS Harness (Pin D ABS Indicator Lamp) Indicator Lamp)
  • Page 28 SECTION F: TROUBLESHOOTING THE POwER SUPPLY Measure the loaded voltage across a type 1157 brake light bulb. Looking into Standard TABS-6 Module Wire Harness, Looking into Premium TABS-6 Module Wire Harness, ECU Connector Measure: ECU Connector Measure: Pin B (Ignition Power) to Pin E (ground) and Pin 6 (Ignition Power) to Pin 18 (ground) and Pin A (Brake Light Power) to Pin E (ground) Pin 12 (Brake Light Power) to Pin 18 (ground)
  • Page 29: Troubleshooting The Wheel Speed Sensors

    SECTION G: TROUBLESHOOTING THE wS-4 wHEEL SPEED SENSORS (wSS) ™ Looking into Wire Harness(es) SR Sensor SL Sensor 1 - Right (Curb) Sensor + 1 - Left (Road) Sensor + 2 - Left (Curb) Sensor - 2 - Right (Road) Sensor - Looking into Premium TABS-6 Module Wire Harness when Additional Wheel Speed Sensors are used: SAR: 11 - Additional Right (Curb) Sensor +...
  • Page 30 SECTION H: TROUBLESHOOTING THE MODULATOR RELAY VALVES Premium TABS-6 Module Wire Harness for BR9235 ™ Modulator Valve Connector (Optional) Looking into ECU Looking into Modulator Connector: Connector Pins: Pin 10 is MOD3 release Pin 9 is MOD2 release Pin 1 (Release) Pin 3 is MOD2 Common Pin 4 is MOD3 Common Pin 2 (Common)
  • Page 31 The module part number, and pin-out information is shown on the label beneath the removable cover. Software Revision Level The current software revision number can be read using a diagnostic tool. Document Revision Level Please visit Bendix.com to ensure you have the latest version of this document.
  • Page 32 BW2469 ©2007 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/07 • Printed in U.S.A.

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