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Honda Ridgeline. Manual - part 125

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11-264

Idle Control System

DTC Troubleshooting (cont’d)

12. Replace the throttle body (see page 11-319).

13. Reset the PCM with the HDS.

14. Do the PCM idle learn procedure (see page 11-273).

15. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

16. Check for these conditions in the DATA LIST with

the HDS:

• ECT SENSOR 1 above 158 °F (70 °C)
• IAT SENSOR above 32 °F (0 °C)
• Vehicle speed is 0 mph (0 km/h)
• ST FUEL TRIM between 0.73 and 1.47
• FSS is CLOSED

17. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at the throttle body and the PCM. If the
PCM was updated, substitute a known-good PCM
(see page 11-8), then recheck. If the PCM was
substituted, go to step 1.

Go to step 18.

18. Monitor the OBD STATUS for DTC P0506 in the

DTCs MENU with the HDS.

If the PCM was updated, troubleshooting is

complete. If the PCM was substituted, replace the
original PCM (see page 11-205). If any other
Temporary DTCs or DTCs were indicated in step 17,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the throttle body
and the PCM. If the PCM was updated, substitute a
known-good PCM (see page 11-8), then recheck. If
the PCM was substituted, go to step 1. If the screen
indicates EXECUTING or OUT OF CONDITION,
keep idling until a result comes on.

Is DT C P0506 indicated?

Does the scr een indicate PASSED?

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DTC P0507:

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11-265

Idle Control System RPM Higher

Than Expected

NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

4. Monitor the OBD STATUS for DTC P0507 in the

DTCs MENU with the HDS.

Go to step 5.

If the screen indicates PASSED, intermittent

failure, the system is OK at this time. If the screen
indicates EXECUTING, let the engine idle until a
result comes on. If the screen indicates OUT OF
CONDITION, 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

Repair or replace the leaking part(s), then go

to step 6.

Go to step 6.

6. Turn the ignition switch ON (II).

7. Reset the PCM with the HDS.

8. Do the PCM idle learn procedure (see page 11-273).

9. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

10. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at the throttle body and the PCM. If the
PCM was updated, substitute a known-good PCM
(see page 11-8), then recheck. If the PCM was
substituted, go to step 1.

Go to step 11.

11. Monitor the OBD STATUS for DTC P0507 in the

DTCs MENU with the HDS.

If the PCM was updated, troubleshooting is

complete. If the PCM was substituted, replace the
original PCM (see page 11-205). If any other
Temporary DTCs or DTCs were indicated in step 10,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

Does the scr een indicate F AILED?

Ar e ther e any leaks?

Is DT C P0507 indicated?

Does the scr een indicate PASSED?

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11-266

Idle Control System

A/C Signal Circuit Troubleshooting

PCM CONNECTOR A (44P)

ACC (RED)

JUMPER WIRE

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.

Go to step 5.

Do the A/C pressure switch circuit

troubleshooting (see page 21-130).

5. Check the A/C system.

The air conditioning system circuit is OK.

Go to step 6.

6. Turn the ignition switch OFF.

7. Turn the ignition switch ON (II).

8. Activate the A/C CLUTCH in the INSPECTION

MENU with the HDS.

Do the A/C system test (see page 21-77).

Go to step 9.

9. Turn the ignition switch OFF.

10. Jump the SCS line with the HDS.

11. Disconnect PCM connector A (44P).

12. Turn the ignition switch ON (II).

13. Momentarily connect PCM connector terminal A14

to body ground with a jumper wire several times.

Update the PCM if it does not have the latest

software (see page 11-7), or substitute a known-
good PCM (see page 11-8), then recheck. If the
symptom/indication goes away with a known-good
PCM, replace the original PCM (see page 11-205).

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 page 22-75), repair open in the wire between
the PCM (A14) and the A/C clutch relay and the
other A/C systems.

Terminal side of female terminals

Does it indicate ON?

Does the A/ C system oper ate?

Is ther e a clicking noise f r om the A/ C compr essor
clutch?

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11-267

Alternator FR Signal Circuit Troubleshooting

PCM CONNECTOR C (44P)

ALTF (WHT/RED)

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.

The alternator signal circuit is OK.

Go to step 4.

4. Turn the headlight switch and ignition switch OFF.

5. Jump the SCS line with the HDS.

6. Disconnect the alternator 4P connector.

7. Disconnect PCM connector C (44P).

8. Check for continuity between body ground and

PCM connector terminal C41.

Repair short in the wire between the PCM

(C41) and the alternator.

Update the PCM if it does not have the latest

software (see page 11-7), or substitute a known-
good PCM (see page 11-8), then recheck. If the
symptom/indication goes away with a known-good
PCM, replace the original PCM (see page 11-205).

Terminal side of female terminals

Does the per centage var y?

Is ther e continuity?

Content .. 123 124 125 126 ..