GMC chervolet camaro 1999 Service Manual page 635

5-160 Antilock Brake System
Brakes
Rear Wheel Speed Sensor Resistance Test Description
The following table contains resistance values for the
rear wheel speed sensors at varying sensor
temperatures for use in diagnosis. The values are
approximate and should be used as a guideline
The number(s) below refer to the step number(s] on
the diagnostic table.
for diagnosis.
6. This step checks for the proper resistance. i11
the WSS.
7. This step checks for the proper WSS output.
DTC C0056 Rear Wheel Speed CKT
Range/Performance
Sensor
Sensor Sensor
Temperature Temperature Resistance
(OC)
(OF)
(Ohms)
-34 to 4 -30 to 40 763 to 1110
5 to 43 41 to 110 908 to 1292
44 to 93 111 to 200 1057 to 1525
DTC C0056 Rear Wheel Speed CKT Range/Performance
Step
Action Value(s) Yes
Was the Diagnostic System Check performed?
1
-
Go to Step 2
2
Inspect the WSS for physical damage.
-
Is physical damage of the WSS evident? Go to Step 3
Replace the WSS. Refer to Wheel Speed Sensor
3
Replacement (Rear With Out Traction Control).
-
Is the replacement complete? Go to Step 16
4
Inspect the jumper harness for physical damage.
-
Is physical damage of the jumper harness evident? Go to Step 5
Replace the jumper harness. Refer to Wheel Speed
5
Sensor Jumper Harness Replacement (Rear with out
-
Traction Control).
Is the replacement complete?
Go to Step 16
1. Disconnect the WSS connector directly at the WSS.
6
2. Using J 39200 DMM, measure the resistance
763-1525
n
between terminals A and B of the WSS.
Is the resistance within the range specified in the value(s)
column? Go to Step 7
1. With the J 39200 DMM still connected to the WSS
select the mV AC scale.
7
2. Spin the rear wheel as fast as you can by hand while
monitoring the AC output.
Above 100 mV
Is the AC voltage within the range specified in the value(s)
column?
Go to Step 8
Using J 39200 DMM, measure the resistance between the
8
WSS terminal A and ground.
OL (infinite)
Is the resistance within the range specified in the value(s)
column? Go to Step 9
1. Disconnect the EBCM/EBTCM harness connector C1.
2. Install the J 39700 Universal Pinout Box using the
J
39700 - 530 cable adapter to the EBCM/EBTCM
9
harness connector C1 only.
OL (infinite)
3. Using J 39200 DMM, measure the resistance
between terminals 22 and 23 of J 39700.
Is the resistance within the range specified in the values
column?
Go to Step 11
No
Go to ABS
Diagnostic
System Check
Go to Step 4
-
Go to Step 6
-
Go to Step 3
Go to Step 3
Go to Step 3
Go to Step 10
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