RDX L4-2.3L Turbo (2008)
The troubleshooting procedures assume that the cause of the problem is still present and the electric vacuum pump system indicator is still on.
Following the procedure when the electric vacuum pump system indicator does not come on can result in incorrect diagnosis.
When a client has driven the vehicle abnormally, these DTCs might be stored:
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DTC P15BC: Drive the vehicle and apply/release the brake pedal repeatedly for 1 minute or more.
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DTC P0571:
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Both the brake pedal and the accelerator pedal are pressed at the same time for 5 minutes, and vehicle speed is 12 mph (20 km/h) or more.
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Stop the vehicle speed from 24 mph (40 km/h) without pressing brake pedal (using only parking brake etc.) continuously 3 times or more.
1. Ask the client about the conditions when the problem occurred and the electric vacuum pump system indicator came on, such as during braking,
acceleration when vehicle was travelling at a certain speed, etc.
2. When the electric vacuum pump system indicator does not come on during the test-drive, but troubleshooting is done based on the DTC, check for
loose connectors, poor contact of the terminals, etc.
3. After troubleshooting or repairs are done, clear the DTCs, and test-drive the vehicle under the same conditions as when the DTC was originally
set. Make sure the electric vacuum pump system indicator does not come on.
4. Check for DTCs in other systems that are connected via the F-CAN. If there are DTCs that are related to the F-CAN, the most likely cause was
that the ignition switch was turned ON (II) while the PCM connectors were disconnected.
Intermittent Failures
The term "intermittent failure" means a system may have had a failure, but it checks OK now. If the electric vacuum pump system indicator on the
instrument panel does not come on, check for poor connections or loose terminals at all connectors related to the circuit that you are troubleshooting.
If the indicators were on but then went out, the original problem may have been intermittent.
How to Use the HDS (Honda Diagnostic System)
1. If the electric vacuum pump system indicator stays on, connect the HDS to the data link connector (DLC) (A) located under the driver's side of the
dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the PCM. If it doesn't, troubleshoot the DLC circuit.
4. Check the diagnostic trouble code (DTC) and note it. Also check the on-board snapshot data, and download any data found. Then refer to the
indicated DTC's troubleshooting, and begin the appropriate troubleshooting procedure.
NOTE:
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The HDS can read the DTC, freeze data, snapshot, current data, and other system data.
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For specific operations, refer to the Help menu that came with the HDS.
How to Retrieve DTCs
1. With the ignition switch OFF, connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the PCM. If it doesn't, troubleshoot the DLC circuit.
4. Follow the prompts on the HDS to display the DTC(s) on the screen. After determining the DTC, refer to the DTC troubleshooting. See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
5. Turn the ignition switch OFF.
How to Clear DTCs
