Resurrecting a 2001 S60 T5 manual

[highmiles]

This car came to me with a partially disassembled motor, the PO had a water pump fail, timing belt... bent valves etc.

I have the motor all back together and am trying to get it started, but no fire yet.

I feel confident that I have the timing correct. I ave fuel pressure at the fuel rail and have confirmed spark at one of the plugs. When I removed the plug it seemed to smell of gas (I wouldn't think all 5 injectors would be clogged...) The gas still smells like gas... but I did not drain the tank, and I have not added any new gas. I don't know how long the car was sitting, but my guess is this gas is 2-3 years old, and there is not much in the tank, likely making more likely to have absorbed a lot of water? So I think this is the next thing to try.

I do have a check engine light, hooked the car up to VIDA and reset codes, but still have a permanent failure with the following:
CEM - 1A5D Communication with ETM control module signal missing
CEM-DF13 CAN- H, high speed network
CEM-DF16 CAN- L, high speed network
ECM-2000 Engine cooland temperature (ECT) sensor - Signal too low
UEM- 0004 Siren Communication fault.
My sense is that these codes will clear (except probably the Siren...) once I get the car running. Anyone see any codes here that would indicate that I have other issues to deal with prior to moving on to the fuel? I did go back and double check to be sure I had all the connectors plugged in and grounds attached.

Thanks in advance for any input!
John

[RickHaleParker]

The cylinder walls have been dry for a long time ... lawn mower syndrome?
Put a tablespoon of oil in each cylinder, then try to get it started.

UEM- 0004 is most likely the battery in the Siren. It may just need the battery changed or the battery may of leaked and damaged the PC board beyond repair. Does the sunroof work?

The three CEM-XXXX, try cleaning connector on the CEM.

ECM-2000 Clean connector, check for opens and shorts in the harness. If no change, replace temperature sensor.

[highmiles]

Actually the sunroof does work, surprised that it does with that code. I will say that one time I tried to operate it did not, but did again after the battery was in and out. Not a priority for now.

Does not look like to much of a pain to pull the CEM and give it a clean.

I did a quick clean on the (EDIT, temperature sensor) connector but no change. Might have to change it out.

Thanks for the guidance!

[E Showell]

You may be flooding with a bad ECT. Try starting with accelerator fully depressed. Sounds counterintuitive, but it isn't wrong. Gives you more air in the air/fuel mix which is what you may need if you are flooding.

[highmiles]

Thanks E. Yes, the first time I tried to start it I did what you would typically do with a FI car, that is, leave the gas pedal alone. Subsequently I tried pumping and then also wide open throttle.

I appreciate the suggestion!

[RickHaleParker]

I did a quick clean on the (EDIT, temperature sensor) connector but no change. Might have to change it out.

Before you reach for your wallet at least check the harness for shorts.
Pull the connector again and put a Ohm meter across the connector. It should show open.
If it shows short/closed, you found a defect in the wiring.

[highmiles]

Thanks Rick, I will do that. Do you know off hand if the harness that the sensor plugs into has two prongs? I notice that the sensor has 2 female connections but the harness had just one. I was figuring it may just ground to chassis but perhaps that is the issue.

John

[RickHaleParker]

Thanks Rick, I will do that. Do you know off hand if the harness that the sensor plugs into has two prongs? I notice that the sensor has 2 female connections but the harness had just one. I was figuring it may just ground to chassis but perhaps that is the issue.

The wiring diagram shows two wires going to the ECM. One of the two is shared with three other sensors. Keep in mind if any of the four sensors pulls down that line you loose all four.

7/16 Coolant temperature sensor.
7/18 A/C pressure switch.
7/77 Air intake temperature sensor.
7/81 Intake manifold pressure sensor.

2019-11-19.png

[volvolugnut]

Drain the tank to get rid of the old gas. Modern gasoline gums up badly in a short time. If it has an alcohol blend it is even worse (will separate and corrode parts). When the old gas if gone, purge the lines all the way to injectors with new fuel. Be safe.
Be sure you get a good flow to each injector and there is no blockage somewhere. If the drained gas has much sediment or rust, clean more carefully and change the filter.

volvolugnut

[abscate]

A 3 second shot of ether will act as surrogate fuel and tell you of ignition and engine compression/timing are good enough to run.