Idle Control System: Diagnosis Honda Ridgeline I рестайлинг

A/C Signal Circuit Troubleshooting

1. Start the engine.
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 the A/C pressure switch circuit troubleshooting: With climate control (see «A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING»(ref-336497-S41050753742009072700000) ). Without climate control (see «A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING»(ref-336464-S22025541692009072700000) ).
5. Check the A/C system. Does the A/C system operate? YES -The air conditioning system 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 the A/C system test (see «A/C SYSTEM TEST»(ref-336464-S21158920082009072700000) ). NO -Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Jump the SCS line with the HDS.
11. Disconnect PCM connector A (49P).
12. Turn the ignition switch to ON (II).
13. Momentarily connect PCM connector terminal A13 to body ground with a jumper wire several times.

Scheme 287

Is there a clicking noise from the A/C compressor clutch?

YES -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM REPLACEMENT ).

NO -Check for poor connections or loose terminals at the A/C clutch relay and the PCM. If the connections are OK, check the A/C clutch relay (see POWER RELAY TEST ), if needed, repair open in the wire between the PCM (A13) and the A/C clutch relay, or other parts in the A/C system.

Alternator FR Signal Circuit Troubleshooting

1. Information marked with an asterisk (*1) applies to '09-11 models.
2. Information marked with an asterisk (*2) applies to '12 model.

1. Start the engine, and let it idle.
2. Monitor the ALTERNATOR in the DATA LIST with the HDS.
3. Check if the indicated percentage varies when the headlight switch is turned on. Does the percentage vary? YES -The alternator signal circuit is OK. • NO -Go to step 4.
4. Turn the headlight switch OFF.
5. Turn the ignition switch to LOCK (0).
6. Jump the SCS line with the HDS.
7. Disconnect the alternator 4P connector.
8. Disconnect PCM connector C (49P).
9. Check for continuity between PCM connector terminal C44 and body ground.

Scheme 288

Is there continuity?

YES -Repair short in the wire between the PCM (C44) and the alternator.

NO -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM REPLACEMENT ).

Scheme 289

Scheme 290

Scheme 291

1. Start the engine, and let it idle.
2. Align the steering wheel straight ahead.
3. Check the PSP SWITCH in the DATA LIST with the HDS. Does it indicate ON? YES -Go to step 4. NO -Go to step 14
4. Turn the steering wheel to the full lock position.
5. Check the PSP SWITCH in the DATA LIST with the HDS. Does it change to OFF? YES -The PSP switch signal circuit is OK. • NO -Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the PSP switch 2P connector.
8. Start the engine.
9. Check the PSP SWITCH in the DATA LIST with the HDS. Does it change to OFF? YES -Replace the PSP switch (see «POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT»(ref-371295-S08989673812010090700000) ). NO -Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector A (49P).
13. Check for continuity between PSP switch 2P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between the PCM (A38) and the PSP switch. • NO -Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-336453-S09500398002009072700000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-336452-S17145915352009072700000) ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see «PCM REPLACEMENT»(ref-336453-S28620960052009072700000) ).
14. Turn the ignition switch to LOCK (0).
15. Disconnect the PSP switch 2P connector.
16. Connect PSP switch 2P connector terminals No. 1 and No. 2 with a jumper wire, then start the engine.
17. Check the PSP SWITCH in the DATA LIST with the HDS. Does it change to ON? YES -Replace the PSP switch (see «POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT»(ref-371295-S08989673812010090700000) ). • NO -Go to step 18.
18. Turn the ignition switch to LOCK (0).
19. Remove the jumper wire from the PSP switch 2P connector.
20. Jump the SCS line with the HDS.
21. Disconnect PCM connector A (49P).
22. Check for continuity between PCM connector terminal A38 and PSP switch 2P connector terminal No. 1. Is there continuity? YES -Go to step 23. NO -Repair open in the wire between the PSP switch and the PCM (A38).
23. Check for continuity between PSP switch 2P connector terminal No. 2 and body ground.

Scheme 292

Is there continuity?

YES -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM REPLACEMENT ).

NO -Repair open in the wire between the PSP switch and G202.

Scheme 293

Scheme 294

1. Turn the ignition switch to ON (II).
2. Check the BRAKE SWITCH in the DATA LIST with the HDS. Does it indicate OFF? YES -Go to step 3. NO -Inspect the brake pedal position switch (see «BRAKE SYSTEM INSPECTION AND TEST»(ref-336455-S34137956342009072700000) ).
3. Press the brake pedal, and check the BRAKE SWITCH in the DATA LIST with the HDS. Does it change to ON? YES -The brake pedal position switch signal circuit (BKSW line) is OK. • NO -Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Jump the SCS line with the HDS.
6. Disconnect the brake pedal position switch 4P connector.
7. Disconnect PCM connector A (49P).
8. Check for continuity between PCM connector terminal A8 and body ground. Is there continuity? YES -Repair short in the wire between the PCM (A8) and the brake pedal position switch. Replace the No. 13 HORN, STOP (20 A) fuse. • NO -Go to step 9.
9. Connect brake pedal position switch 4P connector terminal No. 2 to body ground with a jumper wire.
10. Check for continuity between PCM connector terminal A8 and body ground.

Scheme 295

Is there continuity?

YES -Repair open in the wire between the brake pedal position switch and the No. 13 HORN, STOP (20 A) fuse. Inspect the brake pedal position switch (see BRAKE SYSTEM INSPECTION AND TEST ).

NO -Repair open in the wire between the PCM (A8) and the brake pedal position switch.

Idle Speed Inspection

Note. Before checking the idle speed, check these items: The malfunction indicator lamp (MIL) has not been reported on, and there are no DTCs. Ignition timing Spark plugs Air cleaner PCV system Apply the parking brake.

Scheme 296

1. Disconnect the evaporative emission (EVAP) canister purge valve connector.
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
4. Check the idle speed under no load conditions: headlights, blower fan, radiator fan, audio system, and air conditioner off. Idle speed should be: 720 ± 50 rpm (in P or N)
5. Let the engine idle for 1 minute with high electric load (A/C switch ON, temperature set to Max Cool, blower fan on High, and headlights on high beam). Idle speed should be: 720 ± 50 rpm (in P or N) NOTE: If the idle speed is not within specification, do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-336473-S09468920992009072700000) ). If the idle speed is still not within specification, go to symptom troubleshooting.
6. Reconnect the EVAP canister purge valve connector.