BENDIX MC-30 TRAILER ABS CONTROLLER Informazioni Techniche Pagina 5
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5
Trailer ABS Indicator Lamp Control
Certain models of the EC-60
™
controller activate a trailer
ABS Indicator Lamp (located on the dash panel) that
indicates the status of the trailer ABS unit on one, or more
trailers, or dollies. Typically, the EC-60
™
controller directly
controls the trailer ABS Indicator Lamp based on the
information it receives from the trailer ABS.
Alternatively, some vehicles require the EC-60
™
controller
to activate the trailer ABS Indicator Lamp by communicating
with other vehicle controllers using serial communications.
(If you need to know if your EC-60
™
controller uses a serial
communications message to operate the lamp, e-mail
[email protected], specifying the ECU part number, or call
1-800-AIR-BRAKE and speak to the Bendix TechTeam.)
SAE J1708/J1587 Serial Communications
An SAE J1708 data link, implemented according to SAE
J1587 recommended practice, is available for diagnostic
purposes, as well as ECU status messages.
ATC Lamp Output/ATC Off-Road Switch Input
Premium ECUs control the ATC dash lamp.
The ATC Lamp Illuminates:
1. During power up (e.g. when the vehicle is started) and
turns off after the self test is completed, providing no
diagnostic trouble codes are present.
2. When ATC is disabled for any reason.
3. During an ATC event (the lamp will fl ash rapidly).
4. When the ECU is placed in the ATC off-road mode (the
lamp will fl ash slowly at a rate of 1.0 seconds on, 1.5
seconds off). This notifi es the vehicle operator that the
off-road mode is active.
Interaxle Differential Lock Control (AWD Transfer
Case) Premium ECUs can control the interaxle differential
lock (AWD transfer case). This is recommended on AWD
vehicles, but the ECU must be specially confi gured to
provide this feature. E-mail [email protected] for more
details.
POWER-UP SEQUENCE
WARNING: The vehicle operator should verify proper
operation of all installed indicator lamps (ABS, ATC, and
trailer ABS) when applying ignition power and during
vehicle operation.
Lamps that do not illuminate as required when ignition
power is applied, or remain illuminated after ignition power
is applied, indicate the need for maintenance.
ABS Indicator Lamp Operation
The ECU will illuminate the ABS Indicator Lamp for
approximately three seconds when ignition power is
applied, after which the lamp will extinguish if no diagnostic
trouble codes are detected.
The ECU will illuminate the ABS Indicator Lamp whenever
full ABS operation is not available due to a diagnostic trouble
code. In most cases, partial ABS is still available.
ATC Status/Indicator Lamp Operation
The ECU will illuminate the ATC lamp for approximately
2.5 seconds when ignition power is applied, after which
the lamp will extinguish, if no diagnostic trouble codes are
detected.
The ECU will illuminate the ATC Indicator Lamp whenever
ATC is disabled due to a diagnostic trouble code.
Trailer ABS Indicator Lamp Operation
Certain models of the ECU will control the Trailer ABS
Indicator Lamp when a PLC signal (SAE J2497) from a
trailer ABS ECU is detected.
Engine torque limiting
and differential braking
enabled
No ATC
ATC System
Status Indicator
FIGURE 7 - ATC INDICATOR LAMP START UP SEQUENCE
ON
OFF
0.5
Power
Application
ON
OFF
2.0
2.5
3.0 (sec.)1.5
FIGURE 6 - ABS DASH LAMP START UP SEQUENCE
*Some vehicle manufacturers may illuminate the trailer ABS
indicator lamp at power-up regardless of whether a PLC
signal is detected from the trailer or not. Consult the vehicle
manufacturer’s documentation for more details.
Trailer ABS
Indicator Lamp
(PLC Detected)*
Trailer ABS Indicator
Lamp
(PLC Not Detected)
Powered Vehicle ABS
Indicator Lamp
ABS System
Status Indicators
Power
Application
ON
OFF
0.5
ON
OFF
2.0
2.5
3.0 (sec.)1.5
ON
OFF
- SD-13-4863 1
- Frame and Cab Mount 1
- COMPONENTS 2
- ECU MOUNTING 2
- CONTROLLER INPUTS 3
- HARDWARE CONFIGURATIONS 3
- CONTROLLERS WITH PLC 3
- CONTROLLER OUTPUTS 4
- POWER-UP SEQUENCE 5
- ATC System 5
- Status Indicator 5
- ABS System 5
- Status Indicators 5
- ABS OPERATION 6
- ATC OPERATION 7
- ABS PARTIAL SHUTDOWN 9
- Reconfi guring EC-60 10
- Controllers 10
- Troubleshooting: General 11
- BLINK CODES 12
- ECU DIAGNOSTICS 12
- DIAGNOSTIC MODES 13
- Dynamometer Test Mode 14
- Reconfi gure ECU Mode 14
- The ABS indicator 14
- PC-Based Diagnostic Tools 15
- Nexiq Bendix Application Card 16
- Diagnostics Software 16
- Wheel Speed Sensors 18
- Cab-mount ECU: Looking into 19
- Speed Sensor Repair Tests: 19
- Pressure Modulator Valves 20
- Traction Control Valves 22
- Power Supply Tests: 23
- J1939 Serial Communications 24
- 2nd. Diagnostic 25
- Miscellaneous Troubleshooting 27
- Connectors 28
- X1 X2 X3 30
- Connector 31
- Troubleshooting: Wiring 32
- (Continued) 34
- * * * 35
- * * * * 37
- * * * * 38
- * * * * * * 39
- * * * * * 40
- Glossary 41
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