ECM Hard Reset?


Information and questions on GL1800 Goldwings (2001-Present)
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snickle
Posts: 15
Joined: Tue Oct 06, 2009 9:19 pm
Location: Denison, Texas
Motorcycle: 2007 GL1800
1979 CB550
1983 CB750

ECM Hard Reset?

Postby snickle » Fri Mar 23, 2012 6:58 pm



Has anybody ever heard of a hard reset on the ECM. If so, what is the difference between the hard and soft reset that we all know how to do.



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WOJCIECH
Posts: 143
Joined: Sun Feb 28, 2010 5:39 am
Location: Pabianice Poland
Motorcycle: GL 1800 2009
GL 1800 2009 trike Redwing

Re: ECM Hard Reset?

Postby WOJCIECH » Mon Mar 26, 2012 10:01 am

I heard about the hard start the engine, but not hard reset!

User avatar
snickle
Posts: 15
Joined: Tue Oct 06, 2009 9:19 pm
Location: Denison, Texas
Motorcycle: 2007 GL1800
1979 CB550
1983 CB750

Re: ECM Hard Reset?

Postby snickle » Mon Mar 26, 2012 10:08 am

As my dealer told me. The hard reset on the ecm sets everything back to factory default settings and erases all codes and any other settings in it.

User avatar
WOJCIECH
Posts: 143
Joined: Sun Feb 28, 2010 5:39 am
Location: Pabianice Poland
Motorcycle: GL 1800 2009
GL 1800 2009 trike Redwing

Re: ECM Hard Reset?

Postby WOJCIECH » Mon Mar 26, 2012 11:52 am

ECM reset
The HDS can reset the ECM data including the DTC, freeze data and
some learning memory.
After the ECM reset, follow the idle learn procedure from ECM initialization
(page 6-76 of Service Manual).
ENGINE IDLE SPEED
Make sure the MIL does not indicate any failure
codes before inspecting the engine idle speed.
Shift the transmission into neutral and place the
motorcycle on its center stand on a level surface.
Start the engine, warm it up to the normal operating
temperature and let it idle for 90 seconds without
touching the throttle.
• If the idle speed is lower than 630 rpm, see page
6-76.
• If the idle speed is higher than 770 rpm, see page
6-77.
LOW ENGINE IDLE SPEED
• Make sure the charging system is in good condition
before proceeding.
1. Turn the ignition switch to OFF and disconnect
the ECM 33P black connector and alternator 4P
connector.
Check the Black wire for continuity between the
ECM and alternator connector terminals.
• If there is continuity, go to step 2.
• If there is no continuity, repair the Black wire.
2. Remove the air cleaner housing (page 6-55).
Temporarily install the fuel tank.
Connect the ECM, IAT sensor and BARO sensor
3. Start the engine, warm it up to normal operating
temperature and let it idle.
Disconnect the IAC valve 3P connector.
Block the air passages in the throttle body with
tape and check that the idle speed decreases.
• If the idle speed does not decrease, replace
the IACV.
• If the idle speed decreases, turn out both air
screws an equal number of turns to raise the
idle speed to the specification.
If the idle speed does not fall within the specification,
remove the throttle body (page 6-56),
remove the air screws and clean the air screw
passages.
HIGH ENGINE IDLE SPEED
• Make sure that the charging system is in good
condition before proceeding.
1. Stop the engine and allow it to cool until the
coolant temperature gauge needle moves below
the “C” line.
2. Start the engine and let it idle.
When the radiator cooling fan comes on, stop
the engine and restart it.
After 10 – 20 seconds, check the idle speed.
• If the idle speed is within the specification, the
system is OK.
• If the idle speed is higher than the specification,
go to step 3.
3. Stop the engine and remove the air cleaner
housing (page 6-55).
Check that the No. 5 hoses are connected to the
throttle body and purge control solenoid valve,
and the vacuum hose is connected to the throttle
body and pressure regulator securely.
Connect the loose hose securely or replace the
damaged hose with a new one as necessary.
4. Disconnect the IACV 3P connector.
Temporarily install the fuel tank.
Connect the ECM, IAT sensor and BARO sensor
connectors.
Start the engine, warm it up to normal operating
temperature and let it idle.
Block the air passages in the throttle body with
tape and check the idle speed.
• If the idle speed is within the specification, go
to step 6.
• If the idle speed is higher
5. Turn both air screws in an equal number of turns
to correct the idle speed.
• If the air screws are fully closed but the idle
speed does not fall within the specification,
replace the throttle body with a new one
(page 6-56).
• If the idle speed falls within the specification,
go to step 6.
6. Stop the engine, and remove the tape from the
throttle body.
Start the engine and check the idle speed.
• If the idle speed is out of specification, replace
the IACV.
• If the idle speed is within the specification, go
to step 7.
7. Stop the engine and connect the IACV 3P connector.
Start the engine and check the idle speed.
• If the idle speed is higher than specification,
replace the IACV.
• If the idle speed




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