BENDIX M-21-M-22 ANTILOCK MOD ASSY Especificaciones Pagina 39
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3 Diagnostics, Troubleshooting and Testing
35
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
앫 Take measurements at the ECU harness pins. Figure 3.42 and
Figure 3.43.
Measurements should read as follows:
Figure 3.42
Figure 3.43
J1939 Serial Communications Testing
Electrical Checks
앫 If the ABS ECU is the only ECU on the J1939 datalink which
cannot communicate, then take measurements at the ABS ECU
connector. If other ECUs are not communicating, then
troubleshoot the vehicle datalink backbone and contact the
vehicle OEM for technical assistance if required.
앫 Check for devices that could be overloading the J1939 datalink
slowing down communications.
앫 Verify J1939 High and Low have correct voltage readings, Key
ON, while datalink communications are active.
앫 For resistance measurements, the vehicle battery must be
disconnected and the ignition must be OFF. Figure 3.44 and
Figure 3.45.
Measurements should read as follows:
Location Measurement
Supply Voltage, Battery to
chassis Ground
9.0-16.0V for 12V system
18.0-32.0V for 24V system
Supply Voltage, Ignition to
chassis Ground
9.0-16.0V for 12V system
18.0-32.0V for 24V system
ECU ground to chassis ground Less than 1 ohm resistance
Main ground to chassis ground Less than 1 ohm resistance
Figure 3.42
Figure 3.43
4007214a
CAB MOUNT ECU’S:
LOOKING INTO WIRE HARNESS CONNECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
X1
4007209a
FRAME MOUNT ECU
WITHOUT ESC:
LOOKING INTO WIRE
HARNESS CONNECTOR
FRAME MOUNT ECU
WITH ESC:
LOOKING INTO WIRE
HARNESS CONNECTOR
12
3456
710129118
X1-GRAY
12
3456
71012 911 8
X1-BLACK
131618 1517 14
ECU Power Supply Circuit Connector Pins
Cab-Mounted
Universal with ESC,
Universal or Basic
Supply Voltage,
Battery
X1-15 pin 8
Supply Voltage,
Ignition
X1-15 pin 7
Central Ground X1-15 pin 4, 9
Frame-Mounted
Non-ESC
Supply Voltage,
Battery (Could be IGN)
X1-Gray 1
Supply Voltage,
Ignition
X1-Gray 2
Central Ground X1-Gray 11, 12
Frame-Mounted
With ESC
Supply Voltage,
Battery
X1-Black 1
Supply Voltage,
Ignition
X1-Black 2
Central Ground X1-Black 13, 14
Location Measurement
Across J1939 High and Low Approximately 60 ohms
J1939 Low voltage 0.1V-2.4V
J1939 High voltage 2.5V-5.0V
J1939 High or J1939 Low to
Ground or Power Supply
No continuity
- For E Version ECUs 1
- 12-Volt and 24-Volt Systems 1
- Contents 3
- 1 Introduction 5
- System Components 5
- ATC Components 10
- ATC Switch 10
- XX Orientation 11
- ZZ Orientation 12
- YY Orientation 12
- ESC Components 13
- Figure 2.8 14
- Hill Start Aid (HSA) 15
- Maintenance Information 16
- ABS Indicator Lamp 16
- Diagnostics 17
- TOOLBOX™ Software Diagnostics 17
- 4010611a 18
- 4010612a 18
- 4010613a 18
- 4010614a 18
- Definitions 19
- Clear Mode 20
- Blink Code Illustrations 22
- Blink Code Conditions 23
- Blink Code Identification 24
- Wheel Speed Sensor Testing 25
- Modulator Valve Testing 26
- BAYONET-STYLE CONNECTOR 27
- OPEN-STYLE CONNECTOR 27
- CAB MOUNT ECU’S: 28
- Figure 3.18 29
- 4010617a 30
- 4010619a 30
- 4010620a 30
- Electrical Checks 31
- Software 32
- Figure 3.26 or Figure 3.27 33
- PRESSURE SENSOR CONNECTOR 34
- ESC CAN Network Testing 35
- ESC Module Testing 35
- ESC Module Mounting 36
- ECU Circuit Testing 38
- Figure 3.44 40
- Figure 3.45 40
- 4 Component Replacement 41
- Hazard Alert Messages 41
- 472 500 30. 0 44
- MADE IN GERMANY 44
- 001 20/98 44
- DO NOT MOVE OR RELOCATE 49
- 6S/6M ABS 51
- 4S/4M ABS/ATC 51
- 4S/4M RSC/ATC 52
- 4S/4M ESC/ATC 52
- ECU Connector Pin Assignments 53
- ECU (Frame-mounted) 54
- 4004027d 55
- 4004030i 56
- Figure 6.8 57
- Figure 6.9 58
- Figure 6.10 59
- Figure 6.11 60
- Figure 6.12 61
- Figure 6.13 62
- Figure 6.14 63
- 7 SPN SID FMI Fault Codes 64
- SPN SID FMI Fault Code List 64
- 4010669a 88
- 4010670a 88
- 4010671a 88
- 8 Appendix I 89
- 9 Appendix II 91
- Troy, MI 48084-7121 98
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