Bendix Commercial Vehicle Systems A-18 TRAILER ABS 5/04 User Manual
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FIGURE 32 - Valve Pin Identification and Resistance Chart
Troubleshooting Procedures
ABS Valve Troubleshooting
Follow the steps listed below to locate and correct ABS
modulator valve problems.
1. Access active fault code(s) using the blink code
procedure, the hand-held tester or ServiceRanger
software.
Valve Resistance Test
Measure resistance at the ABS valve location to check the solenoid.
Measure resistance at the appropriate ECU harness connector pins to check the cable and valve.
Note: Refer to the chart for pin identification.
Measure
From:
Looking Into Valve
Measure
To:
Resistance
Range:
Pin 2
Pin 1
3-8 Ohms
Pin 2
Pin 3
6-16 Ohms
Pin 1
Pin 3
3-8 Ohms
No
Connection
Common
Hold
Release
1
3
2
FIGURE 31 - ABS Valve Pin Identification
X2 Black
Coding B
12
1
11
2
10
3
9
4
8
5
7
6
X1 Grey
Coding A
12
1
11
2
10
3
9
4
8
5
7
6
X1 Green
Coding C
12
1
11
2
10
3
9
4
8
5
7
6
BASIC
Harness Connector
Pin
Circuit Description
X1 Green (Coding C)
3
Valve A, Com.
X1 Green (Coding C)
4
Valve A, Hold
X1 Green (Coding C)
10
Valve A, Rel.
STANDARD
Harness Connector
Pin
Circuit Description
X1 Grey (Coding A)
1
Valve B, Hold
X1 Grey (Coding A)
2
Valve B, Com.
X1 Grey (Coding A)
3
Valve A, Com.
X1 Grey (Coding A)
4
Valve A, Hold
X1 Grey (Coding A)
10
Valve A, Rel.
X1 Grey (Coding A)
12
Valve B, Rel.
2. Lookup the code description, the possible causes and
the repair procedures provided in this section.
3. Perform the recommended repair procedures.
4. After the repairs are completed, clear all codes and
check for any additional codes.