Honda Accord 2008 Manual page 333

07/11/02 09:00:01 61TA0000_110_0014
Fuel and Emissions Systems
Symptom Troubleshooting Index (cont'd)
Symptom
After warming up, idle speed
is below specification without
load
(MIL works OK, no DTCs set)
After warming up, idle speed
is above specification without
load
(MIL works OK, no DTCs set)
After warming up, idle speed
drops when steering wheel is
turning
(MIL works OK, no DTCs set)
Low power
(MIL works OK, no DTCs set)
Engine stalls
(MIL works OK, no DTCs set)
Difficult to refuel
(MIL works OK, no DTCs set)
Fuel overflows during
refueling
(No DTCs set)
Fuel cap warning message
stays on
(MIL works OK, no DTCs set)
HDS does not communicate
with the ECM/PCM or the
vehicle
11-14
Diagnostic procedure
1. Troubleshoot the alternator FR signal circuit
(see page 11-337).
2. Do the carbon accumulation check (see page 11-384).
1. Troubleshoot the alternator FR signal circuit
(see page 11-337).
2. Inspect the APP sensor (see page 11-279).
1. Do the ECM/PCM idle learn procedure (see page
11-343).
2. Troubleshoot the PSP switch signal circuit (see page
11-338).
3. Do the carbon accumulation check (see page 11-384).
Check the fuel pressure (see page 11-361).
1. Do the ECM/PCM idle learn procedure (see page
11-343).
2. Check the fuel pressure (see page 11-361).
3. Check the idle speed (see page 11-342).
4. Troubleshoot the brake pedal position switch signal
circuit (see page 11-340).
1. Check the fuel vent tube between the EVAP canister
and the fuel tank.
2. Check the fuel tank vapor recirculation tube between
the fuel pipe and the fuel tank.
3. Replace the fuel tank (see page 11-378).
Replace the fuel tank (see page 11-378).
Troubleshoot the fuel cap warning message system
(see page 11-426).
Troubleshoot the DLC circuit (see page 11-208).
Also check for
Power steering
system problems
• Low compression
• Incorrect camshaft
timing
• Incorrect engine oil
level
• Exhaust restriction
• Intake air leaks
• Faulty harness and
sensor
connections
• Fuel contamination
Malfunctioning gas
station filling nozzle.
Malfunctioning gas
station filling nozzle.