Civic L4-1.3L Hybrid (2008)
Hydraulic Brake Booster: Reading and Clearing Diagnostic Trouble Codes
Diagnostic Strategies
How to Troubleshoot DTCs
The troubleshooting procedures assume that the cause of the problem is still present and the AHB and/or brake system indicator is still on. Following a
troubleshooting procedure for a code that has been cleared but does not reset can result in incorrect diagnosis.
1. Question the customer about the conditions when the problem occurred and the AHB and/or brake system indicator came on, such as during
braking control, braking when the vehicle was traveling at a certain speed, etc.
2. When the AHB and/or brake 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. before you start troubleshooting.
3. After troubleshooting, or repairs are done, clear the DTCs, and test-drive the vehicle under the same conditions that originally set the DTCs. Make
sure the AHB and/or brake system indicators do not come on.
4. Check for other system which are connected via F-CAN, if there are DTCs that are related to F-CAN, the most likely cause was that the ignition
switch was turned to ON (II) with the servo unit connector disconnected. Clear the DTCs. Check for fuel and emissions codes, and troubleshoot
those first.
Intermittent Failures
The term "intermittent failure" means a system may have had a failure, but it checks OK now. If the AHB indicator and the brake system indicator do
not come on, check for loose connectors or terminal pins 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)
How to Use the HDS (Honda Diagnostic System)
1. If the AHB indicator and the brake system indicator stay 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 to ON (II).
3. Make sure the HDS communicates with the vehicle and the servo unit. If it doesn't, troubleshoot the DLC circuit.
4. Check the diagnostic trouble code (DTC) and note it. Then refer to the indicated DTC's troubleshooting, and do the appropriate troubleshooting
procedure.
NOTE:
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The HDS can read the DTC, 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
How to Retrieve DTCs
1. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) under the driver's side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the servo unit. 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.
5. Turn the ignition switch to LOCK (0).
How to Clear DTCs
How to Clear DTCs
