: 94 Fleetwood check engine light...and dash covers?



94bluebrougham
02-21-09, 09:05 PM
Hey guys
my 94 fleetwood check engine light has been coming on and off over the past few months, maby even years. Most recently iv noted fuel economy down about 10 - 20%. I saw AAMCO was running a special to check for free, i dont know if they even have one here locally, but then they'll hit my wallet hard if i were to guess. What do those scanners cost and are they good? any suggestions?
Also my dash has been cracking around the windshield vent. All 4 corners are cracked. Where can i get a nice, affordable dash cover? and suggestions? will they have cutouts for air bag, etc. Anything you guys recommend using to prevent future cracking?
thanks

sven914
02-21-09, 10:01 PM
You can pull the check engine codes codes with out going to a shop. You need to short your Assembly Line Diagnostic Link (ALDL) with a paper clip or jumper wire.

Find your ALDL; it should be a black connector, with 12 holes, in the passenger compartment, under the dash. There is raised notch that signifies the top of the connector (the connector may be upside down). With the connector right side up, insert a paper clip, or jumper wire, into the last two holes on the right side of the top row. Turn the ignition to the run position, but DO NOT START the car.

The check engine light will begin to flash. It will flash several times to signify the first digit of a two digit code. It will then pause and flash several more times to indicate the final digit. The first code that will come out is 12 (1 flash followed by a pause and two more flashes), this code is no tach pulse (no engine RPM), and since the engine will not be on you can ignore it. Follow this link to a complete list of codes and a visual diagram of the ALDL and how to short it out. (http://www.extreme-check-engine-light-codes.com/GM%20OBD1%20Decoder.htm)

thefleetwoodguy
02-21-09, 10:49 PM
codes can be read right through the hvac controls,
this will walk you through it
http://myweb.accessus.net/~090/dtcobd1.html#ope

94bluebrougham
02-21-09, 11:26 PM
should i do both, whats easiest, they both seem simple? any tips

94bluebrougham
02-21-09, 11:59 PM
so i tried to read the HVAC codes but i didnt get anywhere. When i depress off and the up button on the temp control, if flashes with all the display lit up and then reads "off -00" and i can change the number up to 38. Any ideas what im doing wrong. i held it for a really long time and that is all that comes up

sven914
02-22-09, 01:25 AM
Using the climate control head doesn't work on all Cadillacs. Shorting the ALDL will work on all GM cars until 1996.

drmenard
02-22-09, 02:28 AM
Enter diagnostics by . on the climate control on the dash.... press off and temp up.. at the same time and hold down until all the segmets light up...now your pointer will be pointed at -00 ... -00 is the PCM parameter... -01 is CCM..-02 is HVAC
-03 is SIR and -04 is ABS/TCS... so you need to toggle up from -00 to -04 by pressing the fan increase and decrease buttons..... now when you are at the parameter you want to check press the outside temp button... now it will display the numbers that are your trouble codes in that parameter.....post those numbers here and I'll tell you what the book says is wrong...

thefleetwoodguy
02-22-09, 02:32 AM
Using the climate control head doesn't work on all Cadillacs. Shorting the ALDL will work on all GM cars until 1996.
no but it works on a 94 fltwd brhm,,.. since thats what he has

drmenard
02-22-09, 10:59 AM
I have the 94 and 95 manuals. they both have the same thing on this.... I have had no problems getting codes this way... I have 2 94 fleetwoods and a 95 fwb... I never had a problem doing this...

94bluebrougham
02-22-09, 03:54 PM
alright so im going to get all the codes this evening, but i wanted to run a couple things by first. Engine should be on? i tested it and i got a couple codes at times and sometimes just 00, so i assume 00 means nothing is coming up wrong? should i do it all the way up to 38? and sometimes it would quickly flash between two codes like it was deciding and then choose one, whats this mean? Anyway ill get them all tonight, seems like there are a few, hope this isnt bad, thanks for all your help

94bluebrougham
02-22-09, 06:47 PM
Ok so here are the codes, any and all advice is great. I did it with the car on, is that right? it seems like the higher up ones might just be measurements but i dont know. I looked at the sticky thread for codes and it makes little sense so i hope you guys can guide me as to what they mean and what i need to do? which one is causing my check engine light to pop on occasionally? is this the cause of decreased fuel economy?
thanks
00:32
01: 120, 128, 130
04: 127
05: 37
06: 06 ( flash between 6 and 7)
08: 179
13: 14
16:-126
17:-128
18: -117
19: -121
20:-152
21:-155
22:-105
23:59
24:95
25: -154
26: -103
28:105
29:48
30:103
31:44
34:128
35:128
36:74
37:50
38:04

cfb8595
02-23-09, 06:25 PM
Have you ever changed your oxygen sensors?
I ask because if your fuel economy has been getting worse, it might just be your oxygen sensors because if there bad your check engine light usually will come on.
Good luck

thefleetwoodguy
02-23-09, 06:59 PM
Ok so here are the codes, any and all advice is great. I did it with the car on, is that right? it seems like the higher up ones might just be measurements but i dont know. I looked at the sticky thread for codes and it makes little sense so i hope you guys can guide me as to what they mean and what i need to do? which one is causing my check engine light to pop on occasionally? is this the cause of decreased fuel economy?
thanks
00:32
01: 120, 128, 130
04: 127
05: 37
06: 06 ( flash between 6 and 7)
08: 179
13: 14
16:-126
17:-128
18: -117
19: -121
20:-152
21:-155
22:-105
23:59
24:95
25: -154
26: -103
28:105
29:48
30:103
31:44
34:128
35:128
36:74
37:50
38:04


heres the codes for each, thanks to fasstwood for putting these up, also only worry about the first 4-5 parameters, I can tell you that under parameter 24, that gives you engine temp in c
also codes with a 1 in front like 122 means a stored code, from the looks of things your egr may ne at fault

PCM diagnostics codes... (-00)

11: malfunction indicator lamp (MIL) circuit
13: Bank 1 (left) heated o2 sensor (open circuit)
14: Engine coolant coolant temperature sensor (siganl voltage low, high tempurature indicated)
15: Engine coolant coolant temperature sensor (siganl voltage high, low tempurature indicated.
16: Distributor ignition system (low resolution pulse)
18: injector circuits.
21: Throttle position sensor TPS circuit (signal voltage high)
22: Throttle position sensor TPS circuit (signal voltage low)
23: Air intake temperature IAT sensor circuit (signal voltage high, low temperature indicated.
24: Vehicle speed sensor (VSS) circuit.
25: Air intake temperature IAT sensor circuit (signal voltage low, high temperature indicated
26: Evaporative emission (EVAP) canister purge solenoid circuit.
27: Exhaust gas recirculation (EGR) vaccum control signal solenoid valve circuit
28: transmission range (TR) pressure switch assembly fault
29: Secondary air injector (AIR) pump circuit.
32: Exhaust gas recirculation (EGR) 1 of 2
33: Manifold absolute Pressure (MAP) sensor circuit (signal voltage high- vacuum low)
34: Manifold absolute Pressure (MAP) sensor circuit (signal voltage low-vacuum high)
36: Distrigutor ignition system (faulty high resolution pulse or extra low resolution pulse detected.)
37: brake switch stuck on
38: brake switch stuck off
41: Ignition control (IC) circuit (open)
42: Ignition control (IC) circuit (shorted or grounded circuit)
43: Knock sensor (KS) circuit
44: Bank 1 (left) heated O2 sensor circuit (lean exhaust indicated)
45: Bank 1 (left) heated O2 sensor circuit (rich exhaust indicated)
46: PASS-key II circuit
47: Knock sensor circuit or control module missing.
48: Mass air flow (MAF) sensor circuit
50: system voltage low
51: EEPROM programming error
53: Sytem voltage high
55: Fuel lean monitor
58: Transmission fluid temp. (TFT) sensor circuit low (High temperature indicated)
59: Transmission fluid temp. (TFT) sensor circuit high (Low temperature indicated)
63: Bank 2 (right) Heated oxygen sensor(HO2S) circuit (open circuit)
64: Bank 2 (right) Heated oxygen sensor(HO2S) circuit (lean exhaust indicated)
65: Bank 2 (right) Heated oxygen sensor(HO2S) circuit (rich exhaust indicated)
66: A/C pressure refrigerant circuit (open or shorted)
67: A/C pressure refrigerant circuit (pressure sensor or A/C clutch circuit problem)
68: A/C relay circuit (shorted circuit)
69: A/C clutch circuit
70: A/C clutch relay driver circuit
72: vehicle speed sensor loss
73: Pressure control solenoind (PCS) circuit (current error)
74: Traction control system (TCS) circuit low
75: Transmission system voltage low
77: Primary cooling fan relay control circuit (not used with V08 option)
78: Secondary cooling fan relay control circuit
79: Trsnsmission fluid overtemp
81: Transmission 2-3 shift solenoid circuit
82: Transmission 1-2 shift solenoid circuit
84: Transmission 3-2 control solenoid circuit
85: Transmission TCC stuck "ON"
90: Transmission TCC solenoid circuit
95: Change oil lamp circuit
96: low oil lamp circuit
97: VSS output circuit

CCM Diagnostic trouble codes (-01)

20: RAP enable circuit (circuit shorted to battery)
21: RAP enable circuit (circuit open or shorted to ground)
22: DIL enable circuit (circuit shorted to battery)
23: DIL enable circuit (circuit open or shorted to ground)
24: Curtesy output circuit (circuit shorted to battery)
25: Curtedy output circuit (circuit open or shorted to ground)
26: VES output circuit (circuit open or shorted to ground)
27: VES output circuit (circuit shorted to battery)
28: VES tracking tracking error (circuit open, shorted to ground, or shorted to battery)
30: "PASS KEY FAULT" telltale circuit (circuit shorted to battery)
31: "PASS KEY FAULT" telltale circuit (circuit open or shorted to ground)
32: Fuel enable circuit (circuit shorted to battery)
33: Fuel enable circuit (circuit open or shorted to ground)
34: Heaflamp enable circuit (circuit shorted to battery)
35: Park lamp enable circuit (circuit shorted to battery)
36: DRL enable circuit (circuit shorted to battery)
37: DRL enable circuit (circuit open or shorted to ground)
38: EEPROM calibration error
39: EEPROM calibration id error
40: Delay pot circuit (circuit shorted to ground)
41: Dealy pot circuit (circuit open or shorted to battery)
42: Key resistor circuit (circuit shorted to ground)
43: Key resistor circuit (circuit open or shorted to battery)
44: Steering wheel sensor circuit (circuit open or shorted to ground)
45: Steering wheel sensor circuit (circuit open or shorted to battery)
46: CCM internal failure
47: Canadian select input error

HVAC Diagnostic trouble codes (-02)

01: Outside air tempurature sensor circuit (circuit open)
02: Outside air tempurature sensor circuit (circuit shorted)
03: In car air tempurature sensor circuit (circuit open)
04: In car air tempurature sensor circuit (circuit shorted)
05: Sun load sensor circuit (circuit open)
06: Sun load sensor circuit (circuit shorted)
10: Air mix motor circuit (circuit open)
11: Air mix motor circuit (circuit shorted)
26: Serial Data Communication (circuit shorted to battery, shorted to ground, or circuit open)
27: Invalid EEPROM detected

SIR Diagnostic trouble codes (-03)

15: Passenger deployment loop resistance high
16: Passenger deployment loop resistance low
17: Passenger deployment loop open
21: Driver deployment loop resistance high
22: Driver deployment loop resistance low
24: Deployment loop voltage low
25: Deployment loop shorted to ignition
26: Driver's deployment loop open
35: ADS (auxiliary discriminating sensor) missing/shorted to ground
36: ADS closed/shorted to voltage
51: Frontal crash detected
52: Crash data area full
61: Lamp circuit failure
62: Redundant lamp circuit failure
71: Internal SDM malfuntion

ABS/TC Diagnostic trouble codes (-04)

21: RF wheel speed sensor circuit malfunction
23: RF wheel speed sensor circuit continuity malfunction
25: LF wheel speed sensor circuit malfunction
27: LF wheel speed sensor circuit continuity malfunction
28: Wheel speed sensor circuit frequency malfunction
31: RR wheel speed sensor circuit malfunction
33: RR wheel speed sensor circuit continuity malfunction
35: LR wheel speed sensor circuit malfunction
37: LR wheel speed sensor circuit continuity malfunction
41: Right front valve solenoid malfunction
42: RH outlet valve solenoid malfunction
45: Left front valve solenoid malfunction
46: LF outlet valve solenoid malfunction
47: ASV prime line solenoid malfunction
48: USV pilot valve solenoid malfunction
51: Right rear valve solenoid malfunction
52: RR outlet valve solenoid malfunction
55: Left rear valve solenoid malfunction
56: LR outlet valve solenoid malfunction
57: TCC disable relay output malfunction
58: EBTCM internal adjuster assembly malfunction
61: Pump motor or pump motor relay malfunction
62: Traction disable switch used or RPM signal malfunction
63: valve solenoid relay malfunction
64: Throttle position signal malfunction
65: Adjuster assembly circuit malfunction
66: Adjuster assembly control malfunction
67: Throttle position sensor comparison malfunction
71: EBTCM internal malfunction
72: Serial data link malfunction
73: Spark retard monitoring malfunction
85: Low voltage.

94bluebrougham
02-23-09, 08:28 PM
i had one of my O2 sensors replace years ago, but only one. Can the EGR fault be causing check engine and decrease in fuel econ? What should i do about the EGR issue, how can it be fixed? also any of you fleetwood boys familiar with the circuit issues im getting on parameter one? Thanks for all your help

drmenard
02-24-09, 12:03 AM
you are getting a EGR code so it could be your egr valve of the egr solinoid.. I have changed both parts on my 95... and the solinoid is what was putting my light on.. I would take off the egr... its on the back of the intake.. there are 2 studs and nuts holding it on.. take of the nuts and hose ... clean the valve and check operation with a vacume pump.. if all looks good change the solinoid... I got mine at autozone... it was in a duralast box, but inside the box was a delco part.....

94bluebrougham
02-24-09, 09:10 AM
should i change the solenoid even if the valve looks good? i looked its only 20 bucks so probably worth it would you say?

drmenard
02-24-09, 03:56 PM
After you clean the valve .. If it looks bad, frozen or leaking.. then your problem was the valve.. change it.. but if it looks like its not leaking and operates when vacume is put to it... then it is the solinoid..most of the time.. My solinoid looked good and did not check bad with a meter... but after I changed it the light never came back... so I'm saying it is hard to tell if they are bad...

ocmdiaz714
08-03-09, 11:56 PM
so i tried to read the HVAC codes but i didnt get anywhere. When i depress off and the up button on the temp control, if flashes with all the display lit up and then reads "off -00" and i can change the number up to 38. Any ideas what im doing wrong. i held it for a really long time and that is all that comes up

x2. Dude you are GOD. :D