I am led to believe this is for both Gen III LS1 and V6 models, if this is not the case please let me know and I will change it to suit.
WARNING: You can damage your PCM if the ignition is not OFF when disconnecting or reconnecting PCM power
For a VX or VU Commodore replace Fuse No 31 with Fuse No 29 which is also a 10 amp but called "ENG CONT/BCM".
1. Ensure Engine Coolant Temperature is more than 80 degrees.
This information is relatively easy to find. While the car is turned off, hold down the MODE and UP Buttons on your trip computer, and turn the car on.
Use the MODE button to scroll through the information until you reach TEMP.
It normally will only take a few minutes of back street driving to get the car up to the required temperature. I don't believe everyone bothers with this - but it probably makes the Idle Learn Procedure below easier. Although that is another thing not everyone bothers with...
2. Turn Ignition OFF * VERY IMPORTANT *
3. Remove PCM/BCM Fuse
For starters, grab the Fuse Tool from the main Fuse compartment. (Pull down the panel below the steering wheel, the fuses are on the right hand side, and the tool highlighted below. (Look up 'Fuse' in the owners manual.)
Next, pop the bonnet and open up the Engine Compartment fuse/relay panel) - just above the battery.
The fuse diagram should be under the lid of the engine compartment fuse box. You are after F31 - the "ENG. CONT/BCM" Fuse. It is a 10A - but can differ on later models.
Use the Fuse tool above, and carefully remove the PCM Fuse. If the fuses are Brittle (as they can get if older), I suggests picking up a few backup fuses before you do this... just in case.
4. Wait 20 Seconds
5. Replace the PCM/BCM Fuse
6. Perform the Idle Learn Procedure
For Automatic Transmissions:
- Ensure Ignition off and PCM Fuse is back in place
- Set the park brake on and block the drive wheels
- Turn the Air Con / Climate Control OFF
- Start the Engine (Coolant temps should still be >80 deg.)
- Shift transmission into Drive
- Allow engine to idle for 5 minutes
- Shift transmission into Park
- Allow engine to idle for 5 minutes
- Turn the engine off for 30 seconds
For Manual Transmissions:
- Ensure Ignition off and PCM Fuse is back in place
- Set the park brake on and block the drive wheels
- Turn the Air Con / Climate Control OFF
- Place transmission in Neutral
- Start the Engine (Coolant temps should still be >80 deg.)
- Allow engine to idle for 5 minutes
- Turn the engine off for 30 seconds
Thanks to the guys at HoldenLS1.com for letting me use the above information, also Doug from mytired.com for the images deserves a big thanks.
