Honda HR-V: PCM Idle Learn Procedure

Procedure

The idle learn procedure must be done so the PCM can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of these actions:

• Replace the PCM.
• Reset the PCM.
• Update the PCM.
• Replace or clean the throttle body.
• When the engine or transmission is disassembled.

NOTE:

• Clearing the DTCs with the HDS does not require you to do the idle learn procedure.
• The PCM memorizes the learning status in its memory after passed an hour from turning the vehicle to the OFF (LOCK) mode. If you need to disconnect the 12 volt battery terminals before memorizing the learning status in the PCM, jump the SCS line with the HDS, and wait 60 seconds, then disconnect the 12 volt battery terminals.

1. ECM/PCM Idle - Learn

Procedure

1. Make sure all electrical items (the A/C, the audio, the lights, etc.) are off.
2. Reset the PCM with the HDS.
3. Turn the vehicle to the ON mode, and wait 2 seconds.
4. Start the engine. Hold the engine speed at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194ºF (90ºC).
5. Let the engine idle for about 5 minutes with the throttle fully closed.
   NOTE:If the radiator fan comes on, do not include its running time in the 5 minutes.
6. Turn the vehicle to the OFF (LOCK) mode.
7. Jump the SCS line with the HDS.
8. Wait 60 seconds, and exit the SCS mode with the HDS.

PCM RESET

Procedure

1. HDS - Connect

2. PCM - Reset

1. Select the PGM-FI system with the HDS
2. Reset the PCM with the HDS while the engine is stopped
3. Turn the vehicle to the OFF (LOCK) mode
4. Turn the vehicle to the ON mode, and wait 30 seconds
5. Turn the vehicle to the OFF (LOCK) mode, and disconnect the HDS from the DLC.

Fuel and Emissions Systems Learning Procedure

3. PCM - Idle Learn

Transmission Systems Learning Procedure (CVT)

4. CVT System - Learn

PCM UPDATE

Special Tools Required

MVCI unit with the latest control module (CM) update software installed

Procedure

NOTE: High temperature in the engine compartment might cause the PCM to become too hot to run the update.

If the engine has been running before this procedure, open the hood and cool the engine compartment.

1. PCM - Update

NOTE: Check any official service website for more information about updating the MVCI and control units.

2. PCM - Idle Learn

3. CKP Pattern - Clear/Learn

TAILPIPE EMISSIONS TEST

Test

1. HDS - Connect

2. Tailpipe Emissions - Test

1. Start the engine. Hold the engine speed at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.Specified CO: 0.1 % max..
2. Check the idle speed within specification.
3. Warm up and calibrate the CO meter according to the meter manufacturer's instructions.
4. Check idle CO with the headlights, heater blower, rear window defogger, cooling fan, and air conditioner off.
   • If unable to obtain this reading; see DTC troubleshooting.
   • If unable to obtain a CO reading of specified % by this procedure, check the tune-up condition.

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