RDX L4-2.3L Turbo (2008)
Oil Pressure Warning Lamp/Indicator: Testing and Inspection
Low Oil Pressure Indicator Circuit Troubleshooting (Open)
Low Oil Pressure Indicator Circuit Troubleshooting (Open)
1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC).
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the vehicle and the powertrain control module (PCM). If it doesn't, troubleshoot the DLC circuit.
4. Check for DTCs. If a DTC is present, diagnose, and repair the cause before continuing with this test.
5. Turn the ignition switch ON (II), select PGM-FI, and check the OIL PRESSURE SWITCH in the DATA LIST with the HDS.
Is "ON" indicated?
YES-Replace the gauge control module
NO-Go to step 6.
6. Check the oil pressure switch.
Is the oil pressure switch OK
YES-Go to step 7.
NO-Replace the oil pressure switch.
7. Turn the ignition switch ON (II), and jump the SCS line with the HDS, then turn the ignition switch OFF.
NOTE: This step must be done to protect the PCM from damage.
8. Disconnect PCM connector B (44P) and the oil pressure switch connector.
9. Check for continuity between PCM connector terminal B7 and the oil pressure switch connector.
Is there continuity?
YES-Update the PCM if it does not have the latest software, or substitute a known good PCM, then recheck. If the symptom/indication goes away
with a known-good PCM, replace the original PCM.
NO-Repair an open in the wire between the oil pressure switch and the PCM.
