Abs Valve Troubleshooting - BENDIX A-18 TRAILER ABS Manual

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.
6 5 4 3 2 1
7 8 9 10 11 12
X2 Black
Coding B
Harness Connector
X1 Grey (Coding A)
X1 Grey (Coding A)
X1 Grey (Coding A)
X1 Grey (Coding A)
X1 Grey (Coding A)
X1 Grey (Coding A)
FIGURE 31 - ABS Valve Pin Identification
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.
FIGURE 32 - Valve Pin Identification and Resistance Chart
6 5 4 3 2
7 8 9 10 11
X1 Grey
Coding A
STANDARD
Pin Circuit Description
1 Valve B, Hold
2 Valve B, Com.
3 Valve A, Com.
4 Valve A, Hold
10 Valve A, Rel.
12 Valve B, Rel.
No
Connection
2
Common
Looking Into Valve
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.
1
12
Harness Connector
X1 Green (Coding C)
X1 Green (Coding C)
X1 Green (Coding C) 10
Release
1
3
Hold
6 5 4 3 2 1
7 8 9 10 11 12
X1 Green
Coding C
BASIC
Pin Circuit Description
3 Valve A, Com.
4 Valve A, Hold
Valve A, Rel.
Measure Measure
From: To:
Pin 2 Pin 1
Pin 2 Pin 3
Pin 1 Pin 3
Resistance
Range:
3-8 Ohms
3-8 Ohms
6-16 Ohms
27