DTC C0035-C0051. Saturn ION 2003

For 1990-2009 cars only

Makes 🢒 Saturn 🢒 2003 🢒 ION 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C0035-C0051

Circuit Description

The wheel speed sensor produces an alternating current signal whose amplitude and frequency vary, depending on the velocity of the wheel. The electronic brake control module uses the frequency of the AC signal to calculate the wheel speed.

Conditions for Running the DTC

C0035 C0040 C0045 C0050

The ignition is ON.

C0036 C0041 C0046 C0051

•	Vehicle speed is over 43 km/h (27 mph).

•	The brake pedal is not pressed.

•	The ABS is not active.

Conditions for Setting the DTC

C0035 C0040 C0045 C0050

One of the following conditions exists for 0.02 seconds:

•	A short to voltage -- in the wheel speed sensor in one of the WSS circuit.

•	An open -- in the wheel speed sensor signal circuit.

•	A short to ground - the wheel speed sensor signal circuit is shorted to ground

C0036 C0041 C0046 C0051

All of the following conditions exists for 0.02 seconds:

•	The DTC will set if one wheel speed = 0, and the other WSS are greater than 43 km/h (27 mph)

•	The DTC will set if during drive off, one wheel speed = 0, and the other WSS are greater than 12 km/h (7.5 mph)

•	The DTC will set if the vehicle is accelerating 18 km/h(11 mph) and one wheel speed = 0

•	A short to voltage -- the wheel speed sensor signal circuit is shorted to voltage

•	The DTC will set if there is interference on the wheel speed circuits for 20 seconds with the brake pedal applied or 5 seconds when the brake pedal is not applied

Action Taken When the DTC Sets

If equipped, the following actions occur:

•	The EBCM disables the ABS/TCS for the duration of the ignition cycle

•	A DTC malfunction will set

•	The ABS indicator turns ON

•	The traction control switch LED will turn OFF

Conditions for Clearing the DTC

•	The condition for the DTC is no longer present and you used the scan tool Clear DTC function.

•	The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

C0035 C0040 C0045 C0050

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure:

Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons of salt to 354 ml (12 oz) of water.
Test drive the vehicle over various road surfaces (bumps, turns, etc.) above 43 km/h (26 mph) for at least 30 seconds.
If the DTC returns, replace the suspected wheel speed sensor or repair the wheel speed sensor wiring.
Rinse the area thoroughly when completed.

C0036 C0041 C0046 C0051

A possible cause of this DTC is electrical noise on the wheel speed sensor harness wiring. Electrical noise could result from the wheel speed sensor wires being routed to close to high energy ignition system components, such as spark plug wires.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step tests the wheel speed sensor for the proper resistance value.

This step ensures that the wheel speed sensor generates the proper voltage.

Step

Action

Value(s)

Yes

Schematic Reference: Antilock Brake System Schematics

Connector End View Reference: Antilock Brake System Connector End Views

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

Install a scan tool.
Turn ON the ignition.
Set up the scan tool snap shot feature to trigger for this DTC.
Drive the vehicle at a speed greater than the specified value.

Does the scan tool indicate that this wheel speed DTC set?

43 km/h (27 mph)

Go to Step 3

Go to Diagnostic Aids

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Disconnect the wheel speed sensor connector.
Measure the resistance across the wheel speed sensor.

Does the resistance measure within the specified range?

800-1700 ohms

Go to Step 4

Go to Step 8

Spin the wheel.
Measure the AC voltage across the wheel speed sensor.

Does the AC voltage measure greater than the specified value?

100 mV

Go to Step 5

Go to Step 8

Inspect for poor connections at the harness connector of the wheel speed sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 6

Disconnect the EBCM harness connector.
Connect the DMM between the sensor signal and the low reference circuit of the EBCM connector.
Test the wheel speed sensor circuits for the following:

•

An open

•	A short to ground

•	A short to voltage

•	Shorted together

Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 7

Inspect for poor connections at the harness connector for the EBCM. Refer Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace the wheel speed sensor. Refer to Front Wheel Bearing and Hub Replacement in Front Suspension or Rear Wheel Bearing and Hub Replacement in Rear Suspension.

Did you complete the replacement?

Go to Step 10

Replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Did you complete the repair?

Go to Step 10

Use the scan tool in order to clear the DTCs.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK