Lanos S Hatchback L4-1.6L DOHC D-TEC MFI (1999)
Number(s) below refer to the step number(s) on the Diagnostic Table.
1. The Powertrain 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 PCM/ECM or the scan tool. A
short to voltage will appear in the short positions on the scan tool only while the component is being commanded by the PCM/ECM or the scan
tool.
5. Proper operation of any component of function with no 1 in any operation of the positions indicates that the 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 PCM/ECM side of the circuitry.
8. The 1 going away after disconnecting the component electrical connector 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 PCM/ECM is faulty.
9. The replacement PCM/ECM must be reprogrammed. Refer to the latest Techline procedure for PCM/ECM reprogramming.
10. If no faults have been found at this point, refer to Diagnostic Aids for additional checks and information.
