Leganza SX L4-2.2L DOHC D-TEC MFI (1999)
Steps 1 - 9
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
1. The On-Board Diagnostic (OBD II) 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. A 1 in any of the positions indicates that an open or short is present in the corresponding circuit for that position.
4. An open or short to ground will appear in the open positions on the scan tool only when it is not commanded by the ECM or scan tool, while a
short to voltage will appear in the short positions on the scan tool only while the component is being commanded by the ECM or scan tool.
5. Proper operation of any component of function with no 1 in any operation of the positions indicates that system operation is normal at this time.
6. A component or function that failed to operate at this point indicates that the fault is not on the ECM side of the circuitry.
7. The 1 disappears after disconnecting the component electrical connector. This indicates that the component or component side wiring is at fault. If
the scan tool indicates a fault after disconnecting the component electrical connector and verifying that no open or short is present in the circuit,
then the ECM is faulty.
8. The replacement ECM must be reprogrammed. Refer to Powertrain Control Module / Service and Repair.
9. If no faults have been found at this point, refer to "Diagnostic Aids" for additional checks and information.
