Engine swap from z18xe to z22yh

HANSWILFRED

MEMBER
2006 HOLDEN ASTRA
2.2L
4 CYL
2WD
AUTOMATIC
214,172 MILES

Checked air conditioning, no signal from switch.
checked operation from fuse panel to compressor, all okay.
command A/C rely with ACU all okay. Test HVAC module to ACU all okay. Social data between ECU and HVAC controls.

Advised by mechanic that incorrect codes/running gear.

3 Replies

STEVE W.

MECHANIC
13,000 POSTS

What parts were swapped to make the new engine run? The most likely issue is what the mechanic said, If you used the ECU from a 2.2 engine but the body module and controls are the 1.8 parts then are not able to communicate with each other. However, I would expect far more than just the A/C being effected. Do all the other items on the car work and just no A/C?

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Monday, February 10th, 2020 AT 9:06 AM

HANSWILFRED

MEMBER
2 POSTS

Hello sir, as of the moment the A/C is the only one not working. There are no running electric current for it. I don't know if it's applicable to reprogram the car.

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Monday, February 10th, 2020 AT 6:37 PM

STEVE W.

MECHANIC
13,000 POSTS

If it is only the AC and it worked prior to the swap I would look at the wiring to it very close. Have seen more than a few pinched wires after a swap. Did you use the same AC parts that were on the car originally? Do you have access to a factory level scan tool that would allow you to test the CAN bus signals to the controller and verify that it is sending the command signal? Lastly if you used the PCM for the 2.2 do you know if the AC on it worked?

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Monday, February 10th, 2020 AT 6:52 PM