Supporting Vendors / Dealers - Advertising - Shop

2009 - 2013 Corvette: Service Bulletin: #PIT4683F: Additional Wheel Speed Sensor Diagnostics - (Jul 31, 2012)

#PIT4683F: Additional Wheel Speed Sensor Diagnostics - (Jul 31, 2012)

Subject Additional Wheel Speed Sensor Diagnostics
Models 2008 - 2013 Buick Enclave
2007 - 2013 Cadillac Escalade, Escalade ESV, Escalade EXT 2009 Cadillac XLR
2007 - 2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2008 - 2012 Chevrolet Express
2010 - 2013 Chevrolet Camaro
2009 - 2013 Chevrolet Corvette, Traverse
2007 - 2013 GMC Acadia, Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL
2008 - 2013 GMC Savana
2008 - 2009 Pontiac G8
2007 - 2010 Saturn Outlook
With any of the following DTCs: C0035 C0040 C0045 C0050 C0245 P0609

This PI was superseded to update model and model years. Please discard PIT4683E.


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

When diagnosing a wheel speed sensor concern it may be found that the 12 volt Wheel Speed Sensor Supply Voltage circuit from the EBCM has no voltage.  This may incorrectly lead to the replacement of the EBCM because there is no voltage to the WSS.  When the EBCM has a fault with a WSS, it internally turns off the supply voltage to the WSS.

Note: The only part of this PI that applies to the Vans or HD pickups is Step 2 under the Recommendation.

Recommendation/Instructions:

Below are some additional diagnostic tips to help diagnose WSS concerns after the SI ″Circuit Testing″ has been performed:

Note: These tests should only be performed after the SI2000 ″Circuit/System Testing″ is complete; and prior to an EBCM replacement.

  1. To test for the ″12 volt Wheel Speed Sensor Supply Voltage″ from the EBCM with a WSS fault present, perform the following test (This step does not apply to the Vans or HD pickups).
    • A. Disconnect the Tech 2 and Key Off Ignition, Remove Key, Open and Close the driver’s door to turn off RAP (Retained Accessory Power) and wait at least 60 seconds.
    • B. Disconnect the appropriate WSS harness connector.
    • C. Using the appropriate test probes, connect a Fluke 87 DVOM (J39200) across the wheel speed sensor ″Supply Voltage″ and ″Signal″ circuits from the EBCM.
    • D. Set the DVOM on DC volts, press the ″range″ button to the 40 or 60 volt scale and then press the Min/Max button.
    • E. Turn the ignition key on. There will be a quick momentary 12 volt pulse from the EBCM at key up. This 12 volt pulse is sent each time the EBCM is powered up after being asleep to check the WSS circuit integrity.
    • F. If the 12 volt pulse is present continue with the WSS component testing. If the 12 volt pulse is NOT present recheck the circuits between the EBCM and WSS before replacing the EBCM.  Make sure there are no backed out or loose terminals at the EBCM, WSS, or any inline connectors using the appropriate Terminal Test Probes.
  2. Component Testing of the Wheel Speed Sensor (Applies to All Models Listed)

    Note: This procedure is very polarity sensitive and if the WSS is connected in reverse polarity while performing the below procedure the WSS can be permanently damage. Please make sure the B+ is connected to the WSS Supply Voltage and the ground (Fluke 87 DVOM) to the WSS Low Signal Return. Use the appropriate SI wiring diagrams to determine the WSS Supply Voltage and WSS Low Signal Return.

    • A. Ignition OFF, disconnect the harness connector at the suspect wheel speed sensor.
    • B. Connect a 3 amp fused jumper wire between Battery B+ and the ″12 volt High Wheel Speed Sensor Supply Voltage″ terminal.
    • C. Connect a resistor of approximately 100 ohms in series with a Fluke 87 DVOM (J-39200) between the Battery Ground and the ″Wheel Speed Sensor Low Signal Return″ terminal. (Sources of a 100 ohm resistor: High Speed GM Lan terminating resistor, certain test lights, Radio Shack, etc.). Shown below is an example of how to properly connect your meter for testing.
    • D. Set the DVOM to the DC Milliamp scale.
    • E. The typical reading will be 4 to 8 mA for the ″Low″ reading and 11 to 16 mA for the ″High″ reading. As the wheel is turned very slow, a few degrees at a time, the signal will change from the low to the high reading as each tone ring tooth passes the WSS.
    • F. If not within the specified range, replace the wheel speed sensor.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Save

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Name
Email
Security Code Security Code
Related Articles RSS Feed
2005 - 2016 Corvette: 15521 - Customer Advisory Letter - Side Door Release Operation - Phase 2 Mailing
Viewed 702 times since Wed, Apr 27, 2016
2005 - 2017 Corvette: Service Bulletin: #17-NA-087: Characteristics of Wide Low Aspect Ratio Tires, Vehicle Pulls Left or Right, Wanders, Follows Depressions in Road Surface, Tramlining
Viewed 494 times since Wed, Mar 22, 2017
2006 Corvette: Electrical Schematic: Headlight System
Viewed 824 times since Mon, Jul 14, 2014
2005 Corvette: GM TechLink: Setting the Clock Radio
Viewed 863 times since Fri, Jul 18, 2014
2005 - 2013 Corvette: Service Bulletin: Special Coverage Adjustment - Airbag Light On
Viewed 209 times since Thu, Apr 21, 2016
2005 - 2006 Corvette: Service Bulletin: Diagnostic Trouble Code (DTC) C0710 Steering Wheel Position Sensor (SWPS) Signal, Service Stability System Message on Driver Information Center (DIC)
Viewed 4774 times since Mon, Jul 14, 2014
2003 - 2005 Corvette: Service Bulletin: Erratic Fuel Gauge Readings, Fuel Gauge Reads Empty When There Is Fuel In Tank, DTC P0463 Set, Service Fuel System Message Displayed
Viewed 3336 times since Sun, Jul 13, 2014
2005 - 2008: Service Bulletin: Stabilitrak/Active Handling Light On, Service Stabilitrak/Active Handling Message on DIC
Viewed 2213 times since Sun, Jul 6, 2014
2005 - 2012 Corvette: GM TechLink Article: Noticeable Difference in Audio Volume Level
Viewed 751 times since Wed, Jul 2, 2014
2000 - 2018 Corvette: Service Bulletin: #PIP4925A: SES Light with Fuel Trim and or Oxygen Sensor Codes - (Mar 21, 2017)
Viewed 324 times since Wed, Mar 22, 2017