SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 46 (ANTILOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC U1650TEST DESCRIPTION
2006 Buick Terraza CXL, 3.5 L, AWD

Test Description

2006 Buick Terraza CXL, 3.5 L, AWDSECTION Test Description
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  Tests for a short to ground between the CAN HI and CAN LO circuits.
  2. 3:  Tests the CAN HI and CAN LO circuits for a short together.
  3. 4:  This test checks to see if steering angle sensor is centered.
DTC U1650

Step Action Yes No
Schematic Reference: ABS Schematics 
Connector End View Reference: ABS Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Turn OFF the ignition.
  2. Disconnect the electronic brake control module (EBCM).
  3. Install the J 39700  Universal Pinout Box with the J 39700-530 Cable Adapter to the EBCM harness connector only. See Special Tools .
  4. Disconnect the steering angle sensor.
  5. Using the DMM, test the CAN HI and CAN LO circuits for a short to ground between the steering angle sensor and the EBCM. Refer to Testing for Short to Ground in Wiring Systems.
Did you find and correct the condition?		 Go to Step 8  Go to Step 3 
3  Using the DMM, test the CAN HI and CAN LO circuits between the steering angle sensor and the EBCM for being shorted together. Refer to Circuit Testing in Wiring Systems.
Did you find and correct the condition?		 Go to Step 8  Go to Step 4 
4  Perform the steering angle sensor centering procedure. Refer to Steering Angle Sensor Centering Procedure .
Did you successfully complete the centering procedure?		 Go to Step 5  Go to Step 6 
5
  1. Use the scan tool in order to clear the DTCs.
  2. Test drive the vehicle. Refer to Diagnostic Test Drive .
Did DTC C1650 reset?		 Go to Step 7  Go to Step 8 
6 Replace the steering angle sensor.
Did you complete the replacement?		 Go to Step 8  -
7 Replace the EBCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 8  -
8
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting test.
Does the DTC reset?		 Go to Step 2  System OK
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.