"S" off / No bars

[obsolete]

during "power up procedure" part 3 (pre-cranking), the yellow "water level" light comes on but the "S" and "W Inj" lights do not. If i wait until the water level light dims, when I crank (start) the engine, the "S" lights up for the duration of cranking. The guage bargraph test does nothing. I get no bars at any point. The 100% injection test and the test drive (with injector pointed at windshield) both worked out fine aside from the guage showing nothing more than a flickering water level light.

I've checked all the rj-45 connectors and all pins seem fine, everything is plugged in fully. The guage connector is mirrored as it should be.

What to check next?

Thanks in advance.

[Richard L]

This may sound obvious, can you check if the gauge button is depressed. Don't laugh, it has happened before.

On the bottom left of the controller circuit board, is there a label showing the version number?

One more question, what is the serial number on the top of the FCM,

Richard


Richard

[obsolete]

Yup (used this in conjunction with TST dip-switch for easy leak testing)

My HFS-6 is stickied with 04/10/v3 on bottom left of board

12-135-150 is the only serial # looking thing I could find on the FCM

[Richard L]

The serial number of the top edge of the FCM.

Richard

[Richard L]

Can you tell me what car model is yours.

[obsolete]

Ah! Can't believe I missed that. 090507 is the S/N of the FCM

My car is an 08 WRX sedan.

[Richard L]

Can you please check the following for me:

1. At pre-crank position without starting the engine. Does the "S" and back-lit led light up after the start-up timer lasped. (water level led goes out)
2. After cranking and engine running, does the back-lit led lights up?
3. Engine still idling, can you see the flicker on the green F-IDC led on the circuit board? 4. If so, does it flicker in time with engine speed?

May be it is easier for me to give you a call can do some real time testing during this week end? If this is possible, pm me your phone number.

[obsolete]

1. At pre-crank position without starting the engine. Does the "S" and back-lit led light up after the start-up timer lasped. (water level led goes out) nope
2. After cranking and engine running, does the back-lit led lights up? nope
3. Engine still idling, can you see the flicker on the green F-IDC led on the circuit board? 4. If so, does it flicker in time with engine speed? yup

Odd thing I noticed just now: when I turn my headlamp on or off quickly, the "S" and the backlight light up for a split second. Testing the float sensor turns the water level light on and off as expected. I think I might have a wiring issue. I'll get back to you once I re-check all the wires.

[obsolete]

Update: I won't be doing anything that requires the engine to run for the next couple days. My radiator got into an argument with a pebble and the pebble won. I guess that gives me time to re-check all the wiring.

Edit: all wiring checks out fine.

[Richard L]

There is a purple wire (dimming) on the power connector, can you disconnect this wire and retest.