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Test Description

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

  1. 12:  This step is for areas that have inspection and maintenance testing procedures for emissions testing. Use this step if the testing facility found one or more I/M system statuses that did not set.
Diagnostic System Check - Engine Controls

Step Action Yes No
1 Perform the following preliminary inspections:
  • Ensure that the battery is fully charged. Refer to Battery Inspection/Test in Engine Electrical.
  • Ensure that the battery cables are clean and tight.
  • Inspect the easily accessible systems or the visible system components for obvious damage or conditions that could cause the symptom. Refer to Strategy Based Diagnosis in General Information.
  • Ensure that the engine and control module grounds are clean, tight, and in the correct location.
  • Inspect for aftermarket devices that could affect the operation of the system. Refer to Checking Aftermarket Accessories in Wiring Systems.

Did you find and correct the condition?		 System OK Go to Step 2 
2
  1. Install a scan tool.
  2. Turn ON the scan tool.
Does the scan tool turn ON?		 Go to Step 3  Go to Scan Tool Does Not Power Up in Data Link Communications
3
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the Engine control module (ECM).
Does the scan tool communicate with the ECM?		 Go to Step 4  Go to Scan Tool Does Not Communicate with Component in Data Link Communications
4 Attempt to start the engine.
Does the engine crank?		 Go to Step 5  Go to Symptoms - Engine Electrical in Engine Electrical
5 Did the engine start and idle? Go to Step 6  Go to Engine Cranks but Does Not Run
6
IMPORTANT: Do NOT clear the DTCs unless instructed by a diagnostic procedure.
  1. Select the DTC display function for the engine control module and record the DTCs.
  2. If multiple powertrain DTCs are stored, diagnose the DTCs in the following order:
    1. Test for component level DTCs. For example, sensor DTCs, solenoid DTCs, and relay DTCs

      Begin with the lowest number DTC unless the diagnostic table directs you otherwise.

    2. Test for system level DTCs. For example, misfire DTCs, EVAP system DTCs and fuel trim DTCs.
  3. If there are any powertrain DTCs, Select Capture Info in order to store the Powertrain DTC information with a scan tool.
Does the scan tool display any DTCs?		 Go to Step 7  Go to Step 10 
7 Does the scan tool display DTCs which begin with a "U"? Go to Diagnostic Trouble Code (DTC) List  Go to Step 8 
8 Does the scan tool display DTCs P0601, P0602, P0606, or P2610? Go to DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 Go to Step 9 
9 Does the scan tool display DTCs P0562 or P0563? Go to DTC P0562 or DTC P0563 in Engine Electrical Go to Diagnostic Trouble Code (DTC) List 
10 Are there any TCM DTCs or any automatic transmission symptoms? Go to Diagnostic System Check - Automatic Transmission in Automatic Transmission - Aisin (81-40LE) Go to Step 11 
11 Is the customer's concern with Inspection and Maintenance (I/M) testing? Go to Inspection/Maintenance (I/M) System Check Go to Step 12 
12  Are there any engine controls or driveability symptoms observed? Go to Symptoms - Engine Controls System OK
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