Idle Control System: Overview Honda Fit GE

Scheme 258

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
4. Check under these DATA LIST parameters with the HDS: ECT SENSOR 1 above 156°F (70°C) IAT SENSOR above 32°F (0°C) VSS is 0 mph (0 km/h) ST FUEL TRIM between 0.69-1.47 FSS is CLOSED
5. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES: Go to step 6 . NO: If the screen indicates PASSED, go to step 15 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION or NOT COMPLETED, go to step 4 and recheck.
6. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(ref-320437-S29837794652009071400000) ).
7. Check for dirt, carbon, or damage in the throttle bore. Is there dirt, carbon, or damage in the throttle bore? YES: If there is dirt or carbon, clean the throttle body (see «THROTTLE BODY CLEANING»(ref-320437-S26671565662009071400000) ). Also check for damage to the air cleaner element (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-320437-S37694470072009071400000) ), then go to step 9 . If there is damage in the throttle bore, go to step 8 . NO: Check the A/C system and the power steering system, then go to step 9 .
8. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-320437-S21155820802009071400000) ).
9. Reset the ECM/PCM with the HDS.
10. Do the «ECM/PCM IDLE LEARN PROCEDURE»(ref-320447-S03803966382009071400000) .
11. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
12. Check under these DATA LIST parameters with the HDS: ECT SENSOR 1 above 156°F (70°C) IAT SENSOR above 32°F (0°C) VSS is 0 mph (0 km/h) ST FUEL TRIM between 0.69-1.47 FSS is CLOSED
13. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0506 indicated? YES: Check the A/C system and/or the power steering system, then go to step 1 NO: Go to step 14 .
14. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES: Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 13 , go to the indicated DTC's troubleshooting. NO: If the HDS indicates FAILED, check the A/C system and/or the power steering system, then go to step 1 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION or NOT COMPLETED, go to step 11 and recheck.
15. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(ref-320437-S29837794652009071400000) ).
16. Check for dirt, carbon, or damage in the throttle bore. Is there dirt, carbon, or damage in the throttle bore? YES: If there is dirt or carbon, clean the throttle body (see «THROTTLE BODY CLEANING»(ref-320437-S26671565662009071400000) ). Also check for damage to the air cleaner element (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-320437-S37694470072009071400000) ), then go to step 9 . If there is damage in the throttle bore, go to step 8 . NO: Go to step 17 .
17. Recheck with different load conditions (turn on the headlights, the blower motor, the rear window defogger, the A/C, and/or the power steering system, change the gear position, etc.).
18. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES: Intermittent failure, the system is OK at this time. NO: If the HDS indicates FAILED, check the A/C system and/or the power steering system, then go to step 1 and recheck. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION or NOT COMPLETED, go to step 17 .
19. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ).

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle for at least 20 seconds.
4. Monitor the OBD STATUS for DTC P0507 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES: Go to step 5 . NO: If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION or NOT COMPLETED, recheck with different load conditions (electrical, A/C, gear position, etc.), then go to step 3 .
5. Check for vacuum leaks at these parts: PCV valve PCV hose EVAP canister purge valve Throttle body Intake manifold Brake booster hose Brake booster Are there any leaks? YES: Repair or replace the leaking part(s), then go to step 6 . NO: Go to step 6 .
6. Turn the ignition switch to ON (II).
7. Reset the ECM/PCM with the HDS.
8. Do «ECM/PCM IDLE LEARN PROCEDURE»(ref-320447-S03803966382009071400000)
9. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle for at least 20 seconds.
10. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0507 indicated? YES: Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO: Go to step 11 .
11. Monitor the OBD STATUS for DTC P0507 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES: Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 10 , go to the indicated DTC's troubleshooting. NO: If the HDS indicates FAILED, check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION or NOT COMPLETED, recheck with different load conditions (turn on the headlights, the blower motor, or the A/C; change the gear position, etc.), then go to step 9 .

Scheme 259

1. Start the engine, and let it idle.
2. Turn the blower switch on.
3. Turn the A/C switch on.
4. Check the A/C CLUTCH in the DATA LIST with the HDS. Does it indicate ON? YES: Go to step 5 . NO: Do «A/C SYSTEM TEST»(ref-320458-S03484249122009071400000) .
5. Check the A/C system. Does the A/C system operate? YES: The A/C signal circuit is OK. NO: Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Turn the ignition switch to ON (II).
8. Activate the A/C CLUTCH in the INSPECTION MENU with the HDS. Is there a clicking noise from the A/C compressor clutch? YES: Do «A/C SYSTEM TEST»(ref-320458-S03484249122009071400000) . NO: Go to step 9 .
9. Turn the ignition switch to LOCK (0).
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector A (49P).
12. Turn the ignition switch to ON (II).
13. Momentarily connect ECM/PCM connector terminal A15 to body ground with a jumper wire several times. Is there a clicking noise from the A/C compressor clutch? YES: Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-320426-S21651098282009071400000) ). NO: Check for poor connections or loose terminals at the A/C compressor clutch relay and the ECM/PCM. If the connections and the terminals are OK, check the A/C compressor clutch relay (see «POWER RELAY TEST»(ref-320445-S05016371762009071400000) ). If needed, repair open in the wire between the ECM/PCM (A15) and the A/C compressor clutch relay, or in other A/C parts.