Error Codes 22 + 33, High Idle and Running Rich

[chrism]

Well done roj!!! I've been watching this thread converging to a resolution with interest - and look forward to the final 'installment'.

I'm sure many LEC-ers have personalised this problem and taken it to heart like me...

[TorqueHorse]

Haha Roj, that's brilliant!
Happy to be of service for my small part and pass it forward after all the help I've received on this site

[KenS]

Great news and great diagnostics from Torquehorse

[roj]

So……

I tested the cooling fan wiring loom (which includes the power steering pump switch wire).

From the connector block behind the light pod, I performed the following tests:

* Tested for continuity between block and back to the ECU (via earth strap) No audible alarm from the multimeter so I believe we have no grounding upstream.
* Then tested for continuity between block and downstream to the end of the fly lead (that connects to pump).Multimeter probes attached either end and audible warnings indicate we have continuity for that section of wiring. No grounding.
* I then reconnected the fly lead to the pump and disconnected the fly lead from the wiring loom. I then probed the end of the fly lead and with the other probe, made connection with an earth strap. I received an audible warning indicating continuity!

From this, my reckoning is the switch has gone and has stuck closed therefore completing the circuit.

Does this sound right?

* Point to note. This is a ‘new reconditioned’ exchange pump that was purchased and fitted in January. B*gger all miles have been been put on this pump.

I need to confirm the checking steps I have performed are correct before I pursue my next course of action (replacement pump under warranty).

* I also reconnected the cooling fan wiring loom but left the power steering pump disconnected. Car ran fine.

[Tuga2112]

i just realised this could be something worth looking into for the issue with my NA idle being higher than one would desire

[dapinky]

i just realised this could be something worth looking into for the issue with my NA idle being higher than one would desire

Just a thought...... as the NA was intended for a non-PAS rack initially, and the PAS was an option on it..... and the ECU is different to the SE version..... does it still have this switch wire???

[Tuga2112]

that was exactly what i was planning on checking first... unfortunately my garage is full of bags of Cement. no space for lifting the car at the moment

[Fredjohn]

that was exactly what i was planning on checking first... unfortunately my garage is full of bags of Cement. no space for lifting the car at the moment

Hope it doesn't rain too hard and you get cemented in!

[roj]

Just an update......

Car has gone in for an MOT today. So first chance to drive the car since discovering the cause of the high idle (power steering pump). Runs sweet as a nut.

Whilst in the garage, they'll be inspecting the pump to confirm theory/dodgy switch and we'll decide next steps.

In typical fashion, the lights decided not to pop up on the way there. So that's being looked at as well. Sigh...

The good news is this mechanic/garage has experience with Lotus and they certainly know their stuff. So fingers crossed a new place for servicing and any potential troubles.

[TorqueHorse]

Great to hear that the car has been running well!
FYI, someone in an Isuzu forum just rebuilt his power steering pump (which has the same pump as ours) and he posted some pictures. He mentioned that the sensor switch is mechanical and can be taken apart, cleaned, and rebuilt. Here is a photo of it taken apart.

pwr_steering_sensor.png