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
- Make sure all electrical items (the A/C, the audio, the lights, etc.)
are off.
- Reset the PCM with the HDS.
- Turn the vehicle to the ON mode, and wait 2 seconds.
- 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).
- 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.
- Turn the vehicle to the OFF (LOCK) mode.
- Jump the SCS line with the HDS.
- Wait 60 seconds, and exit the SCS mode with the HDS.
PCM RESET
Procedure
1. HDS - Connect
2. PCM - Reset
- Select the PGM-FI system with the HDS
- Reset the PCM with the HDS while the engine is stopped
- Turn the vehicle to the OFF (LOCK) mode
- Turn the vehicle to the ON mode, and wait 30 seconds
- 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
- 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..
- Check the idle speed within specification.
- Warm up and calibrate the CO meter according to the meter manufacturer's
instructions.
- 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.
READ NEXT:
Cleaning
Do not insert your fingers into the installed throttle body when you turn the
vehicle to the ON mode, or while
the vehicle is in ON mode. If you do, you will seriously injure your fingers i
ENGINE CONFIGURATION
Fig. 2: Engine Configuration With Drive Belt Routing And Egine Rotation
CHECK
THROTTLE BODY CARBON ACCUMULATION CHECK
Test
1. HDS - Connect
2. Throttle Body - Test
Start the e
AFTER WARMING UP, IDLE SPEED IS ABOVE SPECIFICATIONS WITHOUT LOAD (MIL
WORKS OK, NO DTCS SET) (KA/KC)
Diagnostic procedure
1. APP Sensor Signal Inspection
Also check for
Intake air leaks
AFTER WARMING
SEE MORE:
■Adjusting the Rear Seat-Backs
Pull the lever on the right to change the angle
of the right half of the seat-back, and left for
the left half.
■Folding Down the Rear Seats
The rear seats can be folded down separately to allow for additional storage
space.
■ To fold down the seat
1. Store th
Probable Cause
Gear noise
Poor gear mesh between ring gear and drive pinion
Hypoid gear (wear or damage)
Poor pre-road (drive pinion)
Debris in hypoid gear area
Fluid level too low
Distortion of the differential carrier case
Excessive backlash (hypoid gear)
Excessive backlash (differential