Diagnostic System Check - Vehicle Diagnostic Information

• Ensure that the battery is fully charged. Refer to BATTERY INSPECTION/TEST .
• Ensure that the battery cables are clean and tight.
• Inspect for any open fuses. Refer to and ELECTRICAL CENTER IDENTIFICATION VIEWS .
• Ensure that the grounds are clean, tight, and in the correct location. Refer to and POWER AND GROUNDING COMPONENT VIEWS .
• Inspect the easily accessible systems or the visible system components for obvious damage or conditions that could cause the concern. This would include checking to ensure that all connections/connectors are fully seated and secured.
• Inspect for aftermarket devices that could affect the operation of the system. Refer to CHECKING AFTERMARKET ACCESSORIES .
• Search for applicable service bulletins.
  • If the preceding inspections/tests resolve the concern, go to DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION .

• If the scan tool does not power up, refer to SCAN TOOL DOES NOT POWER UP .

• If the scan tool does not communicate with one or more of the expected control modules, refer to DATA LINK REFERENCES .

• If either of the DTCs are set, refer to DTC U1814 or DTC B1428 .
  NOTE: Open the drivers door to ensure retained accessory power mode (RAP) is inactive during this test. The engine may start during this test. Turn the engine OFF as soon as the crank power mode has been observed.

Verify that all the parameters listed in the following table correspond to the ignition key position. The PMM Power Mode parameters table below illustrates the correct state of these parameters (circuits) with the corresponding ignition switch positions. The circuits related to the parameters are in parenthesis.

• If any of the power mode parameters do not match in any ignition switch position, refer to POWER MODE MISMATCH .

• If the security indicator remains illuminated after the bulb check, refer to DIAGNOSTIC TROUBLE CODE (DTC) LIST - VEHICLE DIAGNOSTIC INFORMATION  and diagnose any of the following theft deterrent DTCs set as current: B1000, B302A, B3031, B3055, B3060, B3935, B3976, P0513, P0633, P1629, P1631, or P1632.

• If the engine does not crank, refer to SYMPTOMS - ENGINE ELECTRICAL .

• If the engine does not start and run, refer to ENGINE CRANKS BUT DOES NOT RUN .
  NOTE:

  • Do not clear any DTCs unless instructed to do so by a diagnostic procedure.
  • If any DTCs are Powertrain related DTCs, select Capture Info in order to store the DTC information with the scan tool.

• If any DTCs are present, refer to DIAGNOSTIC TROUBLE CODE (DTC) LIST - VEHICLE DIAGNOSTIC INFORMATION  and diagnose any current DTCs in the following order:

1. DTCs that begin with a U.
2. B1000, B1001, B1016, B1019, C0550, C0551, C0558, P0601, P0602, P0603, P0604, P0606, P2101, P2107, or P2610
3. B1325, B1424, B1517, C0800, C0899, C0900, P0560, P0562, or P0563
4. Component level DTCs.
5. System level DTCs.
6. Any remaining DTCs.

• If none of the previous tests or inspections addresses the concern, refer to SYMPTOMS - VEHICLE DIAGNOSTIC INFORMATION .