Speed Sensor Troubleshooting - BENDIX GEN 4 GEN 5 ABS Manual

Speed Sensor Troubleshooting

Follow the steps listed below to locate and correct sensor
related ABS trouble codes.
1. Access active trouble code(s) using either the Blink
Code procedure, with ServiceRanger or the Hand-held
Tester procedure.
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.
5. If a sensor related trouble code has occurred, a code
17•12 will remain in the system until the vehicle has
been driven.
TOP - Looking into harness connector
10 7 4 1 13 10 7 4 1
11 8 5 2 14 11 8 5 2
12 9 6 3 15 12 9 6 3
E D
Harness Connector PIN Circuit Description
B (6-Way) 4
5
C (9-Way) 4
5
D (15-Way) 5
6
8
9
E (12-Way) 5
6-channel 6
Only 8
9
*
Not Used On Basic System
Speed Sensor Resistance Test
The correct resistance for the speed sensor circuit is between 1550 ohms and 2500 ohms.
Measure resistance at the wheel location to check the speed sensor.
Measure resistance at the appropriate ECU harness connector pins to check the cable and speed sensor.
Note: Refer to the chart for pin identification.
FIGURE 24 - Wheel Speed Sensor Harness Circuit Descriptions and Resistance Test
7 4 1 4 1 16 13 10 7 4
8 5 2 5 2 17 14 11 8 5
9 6 3 6 3 18 12 9 6
15
C B A
Speed Sensor (+) Left Steer
Speed Sensor (-) Left Steer
Speed Sensor (+) Right Steer
Speed Sensor (-) Right Steer
Speed Sensor (+) Left Rear
Speed Sensor (-) Left Rear
Speed Sensor (+) Right Rear
Speed Sensor (-) Right Rear
*
Speed Sensor (+) Left Rear Rear
*
Speed Sensor (-) Left Rear Rear
*
Speed Sensor (+) Right Rear Rear
*
Speed Sensor (-) Right Rear Rear
FIGURE 23 - Typical Wheel Speed Sensor Circuit
7
7
6
8
8
5
9
9 4
1
10
10
3
11
11
2
2
12
12 1
3
X1 Grey X2 Black
Harness Connector PIN
X2 (Black) 5
6
7
8
X3 (Green) 1
2
3
4
X4 (Brown) 3
6-channel 4
Only 5
6
*
Not Used On Basic System
6
7
6 7
5
8
5 8
4
9
4 9
3
10
3 10
2
11 2 11
1
12
1 12
X3 Green X4 Brown
Circuit Description
Speed Sensor (-) Right Steer
Speed Sensor (+) Right Steer
Speed Sensor (-) Left Steer
Speed Sensor (+) Left Steer
Speed Sensor (-) Left Rear
Speed Sensor (+) Left Rear
Speed Sensor (-) Right Rear
Speed Sensor (+) Right Rear
*
Speed Sensor (-) Left Rear Rear
*
Speed Sensor (+) Left Rear Rear
*
Speed Sensor (-) Right Rear Rear
*
Speed Sensor (+) Right Rear Rear
6
5
4
3
2
1
25