contact the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725,
option 2, then 1) for further troubleshooting assistance.

Verify components installed match the Electronic Control Unit (ECU)
configuration.

Check for damaged or corroded connectors. Check for damaged
wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team
at 1-800-AIR-BRAKE (1-800-247-2725, option 2, then 1) for further
troubleshooting assistance.

Verify components installed match ECU configuration.
Check for damaged or corroded connectors. Check for damaged
wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team
at 1-800-AIR-BRAKE (1-800-247-2725, option 2, then 1) for further
troubleshooting assistance.
Parameter file was not downloaded. To verify that the vehicle specific
parameters have been loaded, contact Bendix for more information
at 1-800-AIR-BRAKE (1-800-247-2725).

Check for damaged or corroded connectors. Check for damaged
wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team
at 1-800-AIR-BRAKE (1-800-247-2725, option 2, then 1) for further
troubleshooting assistance.

Check for damaged or corroded connectors. Check for damaged
wiring including power and ground wiring. Clear DTCs. If DTCs return,
contact the Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725,
option 2, then 1) for further troubleshooting assistance.

Troubleshooting Diagnostic Trouble Codes (DTCs):
Traction Control Valves (TCV)
1st. Blink
Code

Location

18

Drive Axle Traction Control Valve

19

Steer Axle Traction Control Valve

NOTE: When troubleshooting Traction
Control Valve DTCs, it may be useful to look
for a potential connection between them and
ECU DTCs (in particular, DTCs 13-8 and 13-18
shown on page 36).
2nd.
Blink
Code

Diagnostic Trouble
Code Description

Repair Information

1

TCV Solenoid Shorted
to Ground

Verify 7 to 19 ohms between Traction Control Valve (TCV) and TCV
common. Verify no continuity between TCV leads and ground. Check
for corroded/damaged wiring or connectors between the ECU and TCV.

2

TCV Solenoid Shorted
to Voltage

Verify 7 to 19 ohms between TCV and TCV common. Verify no continuity
between TCV leads and voltage. Check for corroded/damaged wiring or
connectors between ECU and TCV.

3

TCV Solenoid Open
Circuit

Verify 7 to 19 ohms between TCV and TCV common. Check for corroded/
damaged wiring or connectors between ECU and TCV.

4

TCV Configuration Error

The ECU is not configured for ESP or ATC, but has detected the presence
of a TCV. Verify TCV wiring. Inspect for the presence of a TCV. Verify
the ECU configuration.

ATR valve inspections should include: looking for kinked air hoses; inside the harness socket on the valve for
removed or corroded connector pins; and a test to verify that the ATC valve solenoids are functioning correctly.

Traction Control Valve (TCV) Repair Tests:
1. Take all measurements at ECU harness connector pins in order to check wire harness
and traction control valve. Probe the connector carefully so that the terminals are not
damaged.
2. Tractor Control Valve resistance measurements should read:
Location

Measurement

TCV to TCV Common

7 to 19 Ohms

Release, Hold, Common
to Voltage or Ground

Open Circuit (no continuity)

Cab-mount ECU:
Looking into wire
harness connector
X 4

Connector Pin Traction Control Test
X1
18 Way

4

Drive Axle Traction
Control Valve Common

5

Drive Axle Traction
Control Valve

Connector Pin Traction Control Test
X3
15 Way

3

Steer Axle Traction
Control Valve Common

5

Steer Axle Traction
Control Valve

37

Troubleshooting Diagnostic Trouble Codes (DTCs):
Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor]
1st. Blink
Location:
Code
Steering Angle Sensor
21

38

2nd.
Blink
Code

Diagnostic Trouble
Code Description

1

SAS Not Calibrated

Steering Angle Sensor (SAS) has not been calibrated.
Perform SAS calibration procedure.

2

SAS Calibration
in Progress

SAS calibration procedure is underway.

3

SAS Static Signal

SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring
between the Electronic Control Unit (ECU) and the SAS. Check SAS output.

4

SAS Signal Out
of Range

SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring
between the ECU and the SAS. Check SAS output. Perform SAS calibration
procedure.

5

SAS Signal Reversed

SAS signal is reversed. Verify the proper installation of the SAS. Verify proper
wiring between the ECU and the SAS. Check SAS output.

6

SAS Invalid Signal

SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring
between the ECU and the SAS. Check SAS output. Verify that correct SAS is
being used.

7

SAS Gradient Error

SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring
between the ECU and the SAS. Check SAS output. Verify that correct SAS is
being used.

8

SAS CAN Time‑out

Loss of CAN communications between the ECU and the SAS. Verify proper wiring
between the ECU and the SAS. Check SAS output.

9

SAS Long Term
Calibration Error

SAS calibration error. Verify the proper installation of the SAS. Verify proper wiring
between the ECU and the SAS. Check SAS output. Verify that correct SAS is being
used. Verify proper ECU programming. Perform SAS calibration procedure.

10

SAS Plausibility Check

ECU has detected incorrect SAS signal as compared to the Yaw Rate sensor signal.
Verify the proper installation of the SAS. Verify proper wiring between the ECU and
the SAS. Check SAS output. Verify that correct SAS is being used. Verify proper
ECU programming. Perform SAS calibration procedure.

11

SAS detected but
not configured

Verify the ECU is configured for ESP.

Repair Information

Troubleshooting Diagnostic Trouble Codes (DTCs):
Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor]
(continued)

Steering Angle Sensor (SAS) Connector

Looking into wire harness connector
(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON).

Steering Angle Sensor Tests
1. Measure resistance between input voltage and ground
at the sensor wiring harness connector.
Verify continuity between the Electronic Control Unit
(ECU) and SAS‑60 and Yaw Rate Sensor (typically
YAS-70 or YAS-60).
Connector
SAS
ECU
12 Way

X4

Pin

Function

2

Voltage Input

1

Ground Input

11

Power

10

Common

4. To perform a calibration procedure of the Steering Angle
Sensor, Bendix® ACom® Diagnostic Software V6.7.2.5
or higher is required. Using the program, select the
“Configuration” option, followed by the “Calibrate”
option. The following screen should be displayed.

2. Verify wiring between the Steering Angle Sensor and
the ECU.
SAS Wire
Harness
Terminal

ECU Wire
Harness
Terminal

Measurement

5. Follow the prompts to perform a calibration of the
Steering Angle Sensor.

4

7

Verify Continuity

3

8

Verify Continuity

6. To test the Steering Angle Sensor, ACom V6.7.2.5, or
higher, is required. Using Bendix ACom V6.7.2.5 or
higher, select the “Component Test” option, followed
by the “ESP Test” option. The following screen should
be displayed.

3. Verify wiring between the Steering Angle Sensor and
power/ground.
SAS Wire Harness
Terminal

Measurement

4 to Voltage &
Ground

Verify open circuit (no
continuity)

3 to Voltage &
Ground

Verify open circuit (no
continuity)

7. Follow the prompts to perform a test of the Steering
Angle Sensor.

39

Troubleshooting Diagnostic Trouble Codes (DTCs):
Yaw Rate Sensor (YRS)
1st. Blink
Code
22
2nd.
Blink
Code

40

Location:
Yaw Rate Sensor

Diagnostic Trouble
Code Description

Repair Information

1

YRS Signal Out of
Range

The YRS signal is incorrect. Verify the proper installation of the YRS. Verify proper
wiring between the Electronic Control Unit (ECU) and the YRS. Check the YRS output.
Perform the YRS calibration procedure.

2

YRS Sensor
Reversed Signal

The YRS signal is reversed. Verify the proper installation of the YRS. Verify the wiring
between the ECU and the YRS. Check the YRS output.

3

YRS Invalid Signal

4

YRS Gradient Error

5

YRS CAN Time‑out

Loss of CAN communications between the ECU and the YRS. Verify proper wiring
between the ECU and the YRS. Check the YRS output.

6

YRS Static BITE
Error

The YRS signal fails static self-test. Verify the proper installation of the YRS. Verify
proper wiring between the ECU and the YRS. Check the YRS output. Verify that
correct YRS is being used. Verify proper ECU programming. Perform the YRS
calibration procedure.

7

YRS Dynamic BITE
Error

The YRS signal fails self-test conducted while vehicle is in motion. Verify the proper
installation of the YRS. Verify proper wiring between the ECU and the YRS. Check the
YRS output. Verify that correct YRS is being used. Verify proper ECU programming.
Perform the YRS calibration procedure.

8

YRS Fast Calibration
Error

The YRS signal is invalid. Verify the proper installation of the YRS. Verify proper
wiring between the ECU and the YRS. Check the YRS output. Verify that correct
YRS is being used.

There is a YRS calibration error. Verify the proper installation of the YRS. Verify proper
wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS is
being used. Verify proper ECU programming. Perform the YRS calibration procedure..

9

YRS Static
Calibration Error

10

YRS Normal
Calibration Error

12

YRS Plausibility
Check (Ref Yaw
Rate)

13

YRS Plausibility Error
(Inside Model Based
Limits)

14

YRS Plausibility
Error (Outside Model
Based Limits)

15

YRS - SAS Signal
Cross-check
Incomplete

The ECU (if configured) must confirm that YRS and SAS signals match. The vehicle
must be exposed to an S-shaped driving maneuver for this DTC to automatically clear.
If the DTC does not clear even after the S-shaped driving maneuver, check and correct
the orientation of the YRS and then repeat the maneuver.

16

YRS - Vibration
Detected

Inspect the YRS mounting and verify it is securely mounted. Note that the YRS may
not be relocated from the OEM-installed position on vehicle without written Bendix
Engineering approval.

17

YRS Detected But
Not Configured

Verify that the ECU is configured for ESP.

There is a YRS calibration error. Verify the proper installation of the YRS. Verify proper
wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS
is being used. Verify proper ECU programming. Perform the YRS calibration procedure.

The ECU has detected an incorrect YRS signal. Verify the proper installation of the
YRS. Verify proper wiring between the ECU and the YRS. Check the YRS output.
Verify that correct YRS is being used. Verify proper ECU programming. Perform the
YRS calibration procedure.

Troubleshooting Diagnostic Trouble Codes (DTCs):
Yaw Rate Sensor (YRS) (continued)

Yaw Connector

Looking into wire harness connector
(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.).

Yaw Rate Sensor Tests
1. Verify continuity between the Electronic Control Unit
(ECU) and the Yaw Rate Sensor (typically YAS-70 or
YAS-60).
Connector
YRS
ECU
12 Way

X4

Pin

Function

2

Voltage Input

1

Ground Input

11

Power

10

Common

4. To perform a calibration procedure of the Yaw Rate
Sensor, ACom ® Diagnostic Software V6.7.2.5 (or
higher) is required. Using the program, select the
“Configuration” option, followed by the “Calibrate”
option. The following screen should be displayed.

2. Verify wiring between the Yaw Rate Sensor and the
ECU.
YRS Wire
Harness
Terminal

ECU Wire
Harness
Terminal

Measurement

4

7

Verify Continuity

3

8

Verify Continuity

3. Verify wiring between the Yaw Rate Sensor and power/
ground.
YRS Wire Harness
Terminal

Measurement