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Doc. No. Y250910 (EN - Rev. 001)
September 2016
KB4TA / KB4TA D System Diagnostics
P r o d u c t D a t a
PD-203-390
ABS Configuration
To display the ABS configuration, switch on the ignition and apply/release the brake pedal six times within 15
seconds. The first blink code defines the number of sensors (2 or 4), the second defines the number of modulators
(2 or 3) and the third defines the control mode which can be ignored.
Display Odometer Mileage
To display the trailer odometer mileage, switch on the ignition and apply/release the brake pedal seven times within
15 seconds. Following activation, there will be a five second delay followed by a blink code display of the odometer
information (x1000). Example: 152.431 km will be displayed as 152 (x1000); i.e. one blink (pause), five blinks (pause),
two blinks. Zeros will be displayed by the ABS warning lamp blinking twice. Odometer mileage cannot be altered with
blink code diagnostics. Complete odometer information can be retrieved using the PC diagnostic tool ECU
talk
®.
Blink Code Label
ABS sign attached to the vehicle showing the DTCs
1st Blink Code
Code
Location
1
All
2
Sensor SL
3
Sensor SR
4
Sensor SAL
5
Sensor SAR
6
Power
7
Modulator 22
8
Modulator 21
9
AUXIO1 / Modulator 2
10
Common
11
ECU
12
AUXIO1
13
AUXIO2
14
System
To read current and stored faults:
1. Ensure that the ABS is powered via the
ISO 7638 connection.
2. Apply and release the brake pedal at 1 second intervals:
a) 3 times to read current faults
b) 4 times to read stored faults.
3. After a period of 5 seconds the blink codes will
be displayed.
4. Observe the trailer ABS lamp in the towing vehicle and
record the blink code sequence.
5. A description of each blink code is shown in the table.
6. After rectifying any faults, check that the trailer ABS
warning lamp in the towing vehicle is not illuminated
after turning the ignition off and on. This may necessitate
driving the vehicle at a speed >10km/h.
Note:
Blink code information is only available when the
Stop Lamp power option and either 2S/2M or
4S/2M ABS are configured.
Trailer-ABS KB4TA
2nd Blink Code
Description
No faults present
Wheel speed sensor air gap too big
Loss of wheel speed sensor signal
Noisy wheel speed sensor signal
Short or open circuit wheel speed sensor
Tyre size differential out of range
Wheel speed sensor configuration error
Voltage too high
Voltage too low
Excessive resistance on ISO 7638 Pin1
Exhaust solenoid short or open circuit
ABS valve installation error
Valve configuration error
Internal short to ground
AUXIO1 or Modulator 2 short to ground
ABS valve dynamic error – all valves
Excessive ABS activity
AUXIO1 or Modulator 2 short to battery
Internal error
Configuration error
Short or open circuit
Service interval exceeded
Code
1
3
4
5
6
1
2
3
2
3
4
1
2
3
4
5
1
2
1
2
2
1
Y026787: 006: EN: Released: Fri Nov 11 11:18:50 CET 2016:
