BENDIX EC-30 ABS-ATC CONTROLLER Troubleshooting

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BENDIX EC-30 ABS-ATC CONTROLLER Troubleshooting
Troubleshooting EC-30
ABS
Trailer ABS
DASH
Blink Code Switch
(Optional)
ATC
™
M-32
Modulator
M-32QR
™
(Ref.
Modulator
SD-13-4870)
™
M-30
Modulator
(Ref. SD-13-4830)
ANTILOCK
MODULATOR
ASSEMBLIES
Toubleshooting Test
Source
™
™
M-32
and M-32QR
Hold
B
Modulator Twist-Lock (Bayonet)
C
Exhaust
and Threaded (Metric) Connectors
A
Source B
Connector
Exhaust A
M-30
™
and M -32
™
Modulator Packard
Connector
Hold C
M-30
™
Modulator
Hold To Source:
C – B Read 3.5 to 5 Ohms
Exhaust To Source: A – B Read 3.5 to 5 Ohms
Exhaust To Hold:
A – C Read 7.0 to 10 Ohms Read 9.8 to 11 Ohms
Source To Ground: B –
No Continuity
1st
2nd
Digit Digit Fault Description
1
1
No Faults
Power / ABS Controller
1
2
Battery Voltage Too High
1
3
Battery Voltage Too Low
1
4
ABS Controller Fault (2)
1
5
ABS Controller Fault (6)
1
6
ABS Controller Fault (7)
1
7
ABS Controller Fault (9)
1
8
ABS Controller Fault (10)
1
9
ABS Controller Fault (11)
1
10
ABS Controller Fault (12)
1
11
ABS Controller Fault (13)
1
12
ABS Controller Fault (14)
1
13
ABS Controller Fault (1)
1
14
ABS Controller Fault (3)
1
15
ABS Controller Fault (8)
Wheel Speed Sensors
2
1
LF Sensor Start
3
1
RF Sensor Start
4
1
LR Sensor Start
5
1
RR Sensor Start
6
1
LM Sensor Start
7
1
RM Sensor Start
™
Controller Antilock Systems with Optional Traction Control
TRACTION SERVICE Enable / Disable
(LOCATED IN DASH AREA)
When Servicing DRIVELINE
Disable TRACTION (Switch OFF)
Straight
Sensor
M-32
™
& M-32QR
™
Clip
Modulators
Read 4.9 to 5.5 Ohms
Read 4.9 to 5.5 Ohms
No Continuity
*Brake-Link and Nexiq are trademarks of NNT, Inc. SPX and Kent-Moore are trademarks of SPX Corporation.
Wheel Speed Sensors (Continued)
2
2
LF Sensor Intermittent
3
2
RF Sensor Intermittent
4
2
LR Sensor Intermittent
5
2
RR Sensor Intermittent
6
2
LM Sensor Intermittent
7
2
RM Sensor Intermittent
2
3
LF Sensor Shorted to VBAT
3
3
RF Sensor Shorted to VBAT
4
3
LR Sensor Shorted to VBAT
5
3
RR Sensor Shorted to VBAT
6
3
LM Sensor Shorted to VBAT
7
3
RM Sensor Shorted to VBAT
2
4
LF Sensor Shorted to Ground
3
4
RF Sensor Shorted to Ground
4
4
LR Sensor Shorted to Ground
5
4
RR Sensor Shorted to Ground
6
4
LM Sensor Shorted to Ground
7
4
RM Sensor Shorted to Ground
2
5
LF Sensor Open
3
5
RF Sensor Open
4
5
LR Sensor Open
VEHICLE
ENGINE MODULE
1587 DIAGNOSTIC
CONNECTOR
WHEEL SPEED
SENSOR-CONNECTOR
Resistance for WS-20
wheel speed sensors across pins:
Exciter
1500-2500 Ohms
Ring
(Ref. SD-13-4754 for WS-20
(Ref. SD-13-4860 for WS-24
TYPICAL
FRONT
AXLE

BLINK CODE DEFINITIONS

Wheel Speed Sensors (Continued)
5
5
6
5
7
5
2
6
3
6
4
6
5
6
6
6
7
6
2
7
3
7
4
7
5
7
6
7
7
7
2
8
3
8
4
8
5
8
6
8
7
8
ANTILOCK / TRACTION
CONTROLLER
(Ref. SD-13-4815)
EC-30
™
CONTROLLER
DIAGNOSTIC
DISPLAY
Ty Wrap
Right
Angle
Mounting
Sensor
TYPICAL
REAR AXLE
Lap Top
Computer
™
and WS-24
™
™
sensors)
™
sensors)
J1708/J1587
(RP-1210) Hardware
Interface Adapter
Hand Held Tools
• Brake-Link
* 5010749
™
• Application card available from
NEXIQ
*, SPX
*, Kent-Moore
™
™
RR Sensor Open
LM Sensor Open
RM Sensor Open
LF Sensor Shorted Across Sensor
RF Sensor Shorted Across Sensor
LR Sensor Shorted Across Sensor
RR Sensor Shorted Across Sensor
LM Sensor Shorted Across Sensor
RM Sensor Shorted Across Sensor
LF Sensor Lock Time Out
RF Sensor Lock Time Out
LR Sensor Lock Time Out
RR Sensor Lock Time Out
LM Sensor Lock Time Out
RM Sensor Lock Time Out
LF Sensor Frequency Doubling
RF Sensor Frequency Doubling
LR Sensor Frequency Doubling
RR Sensor Frequency Doubling
LM Sensor Frequency Doubling
RM Sensor Frequency Doubling

INSTRUCTIONS

ALWAYS USE EXTREME CAUTION WHEN WORKING ON
OR AROUND VEHICLES.
START UP: When power is applied the antilock and traction
dash warning lamps will illuminate for a period of 2.5 seconds
while the electronic control unit (ECU) is performing a self
check, and "Chuff" test. If a trailer being towed has PLC,
the trailer dash lamp will illuminate for 2.5 seconds then
turn off unless a fault is indicated. The ABS and traction
control modulators will be energized during the Chuff test.
It is recommended during the initial start up that the brakes
be applied to audibly hear the modulators exhaust during
the "Chuff' test.
SERVICE NEEDED: When an issue is detected at start up,
the dash lights will fl ash and remain illuminated. When a
dynamic wheel speed issue is detected the dash lamps will
illuminate as early as 10 mph, indicating a wheel speed issue.
The dash lamps notify the driver that all or part of the ABS
function has been disengaged and standard air braking is
in effect. The ECU will automatically reset most intermittent
codes (self healing). In most instances, if the intermittent
code has occurred more than fi ve times the issue will be
latched and require a magnetic reset. The area of concern
will always be identifi ed in the diagnostic display.
TRACTION FUNCTION: The ECU monitors wheel spin.
When a spin condition exist, the traction dash lamp will
blink continuously indicating the traction control system
is active.
IF SERVICING THE VEHICLE DRIVE LINE,
TRACTION SERVICE ENABLE / DISABLE SWITCH MUST
BE DISABLED.
(The traction dash lamp will be illuminated)
RESET: The ECU can be magnetically reset by momentarily
holding a magnet against the RESET area on the controller.
SELF CONFIGURING: During self confi guring the ECU
will automatically determine the number of sensors and if
electronic engine equipped. The ECU will also determine if
the vehicle is traction equipped ONLY if the traction switch
is toggled prior to magnetically self confi guring. Holding a
magnet against the RESET area for 30 seconds completes
self confi guring.
BLINK CODE ACTIVATION: The ECU will provide blink
code diagnostics through the use of the blink code switch.
Details on active faults, fault history, ECU confi guration, and
clearing of faults can be found in service data SD-13-4815.
PC Software
Parallel
• ACom
Diagnostics
®
or Serial
order BW2329 or
Cable
download from
www.bendix.com
*.
™
Note 1: Check sensor gap.
With sensor in contact with
the tone ring, for Bendix wheel
speed sensors, there should be
at least 0.25 vac voltage output
when turning wheel by hand at
0.5 rev/sec.