Nubira SX Hatchback L4-2.0L DOHC D-TEC MFI (1999)
Steps 11 To 22
Test Description
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.
9. A faulty EGR valve can leak a small amount of current from the ignition feed circuit to the 5 volt reference circuit. If the problem does not
exist with the EGR valve disconnected, replace the EGR valve.
11-19.
If a sensor input circuit has been shorted to voltage, ensure that the sensor has not been damaged. A damaged IAT or ECT sensor will continue
to indicate a high voltage or low temperature after the affected circuit has been repaired. A damaged ACT, TP, MAP, Fuel Tank Pressure, or
EGR Pintle Position sensor will indicate a high or low voltage or may be stuck at a fixed value after the affected circuit has been repaired. If
the sensor has been damaged, replace it.
21. The replacement PCM/ECM must be reprogrammed. Refer to Powertrain Control Module / Service and Repair.
