Hombre XS Space Cab 2WD L4-2.2L CPC (1999)
Steps 7 - 10
Test Description
The number(s) below refer to the step number(s) on the Diagnostic Table.
1. The Powertrain OBD 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 a open or short is present in the corresponding circuit for that position.
3. Refer to The scan tool display art to determine which circuit corresponds to which position of the scan tool display.
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 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 PCM or scan tool.
5. Proper operation of any component or function with no 1 in any 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 malfunction is not on the PCM side of the circuitry. Go to the
appropriate Transmission, 8 A or Engine Controls for further diagnosis.
8. The 1 going away after disconnecting the component electrical connector indicates that the component or component side wiring is
malfunctioning. If the scan tool indicates a malfunction after disconnecting the component electrical connector and verifying that no open or short
is present in the circuit, then the PCM is malfunctioning.
9. Replacement PCMs must be reprogrammed. Refer to the latest Isuzu Technical Communication System (ITCS) information for programming
procedures.
10. If no malfunctions have been found at this point, Refer to Diagnostic Aids for additional checks and information.
