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Test Description

WARNING: This page is about a different car, the 2005 Suzuki Swift +, 2005 Pontiac Wave, and 2005 Chevrolet Aveo. 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. 1:  The On-Board Diagnostic (EOBD) System Check prompts the technician to complete some basic checks and store the Freeze Frame and Failure Records data on the scan tool if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference.
  2. 2:  Unlike the UART serial data circuit, the only time a class 2 serial data circuit has any voltage on it is when a scan tool asks the ECM for information and sends the information out.
  3. 5:  Locate and repair any shorts that may have caused the fuse to open before replacement, if the no voltage condition was due to an open fuse.
  4. 10:  The scan tool or associated cables could be malfunctioning. Refer to the scan tool manual for repair information.
Data Link Connector Diagnosis

Step Action Yes No
1  Perform an On-Board Diagnostic (EOBD) System Check.
Was the check performed?		 Go to Step 2  Go to Diagnostic System Check - Engine Controls
2  With a test light connected to the ground, probe the data link connector (DLC) battery feed terminal 16.
Does the test light illuminate?		 Go to Step 4  Go to Step 3 
3 Repair an open or short to ground in the DLC battery feed circuit.
Is the repair complete?		 Go to Step 4  -
4 With a test light connected to the battery, probe the DLC ground terminal 4 and 5.
Does the test light illuminate?		 Go to Step 6  Go to Step 5 
5  Repair an open circuit.
Is the repair complete?		 Go to Step 6  -
6
  1. Turn the ignition switch to LOCK.
  2. Install the scan tool to the DLC.
  3. Turn the ignition switch to ON.
Does the scan tool power up?		 Go to Step 8  Go to Step 7 
7 Inspect for damages in the terminal of DLC and scan tool, and repair as needed.
Is the repair complete?		 Go to Step 8  -
8 Using a scan tool, request engine data of engine control module (ECM).
Does the scan tool display any data?		 Go to Step 12  Go to Step 9 
9 Install the scan tool on another vehicle and check for proper operation.
Does the scan tool work properly on a different vehicle?		 Go to Step 11  Go to Step 10 
10  The scan tool is malfunctioning. Refer to the scan tool manual for repair.
Is the repair complete?		 Go to Step 12  -
11 Repair the communication circuit between the ECM and DLC.
Is the repair complete?		 Go to Step 12  -
12
  1. Using a scan tool, clear the DTCs.
  2. Attempt to start the engine.
Does the engine start and continue to run?		 Go to Step 13  Go to Step 2 
13
  1. Allow the engine to idle until normal operation temperature is reached.
  2. Check if any DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 Go to applicable DTC table System OK
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