1993 5.7L Throttle Body Injection, VIN 7 |
13 |
Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60
seconds. |
14 |
Coolant temperature sensor signal indicates a temperature of over
275° F for 2 seconds. |
15 |
Coolant temperature sensor signal indicates a temperature colder
than -27° F for 30 seconds after the engine has been running for at least 30 seconds. |
21 |
TPS sensor voltage was above 2.5 volts for 8 seconds when the MAP
sensor signal showed manifold vacuum to be 15 pounds or more. |
22 |
TPS voltage was under 0.2 volts when the engine was running. |
23 |
Inlet air temperature sensor signal showed an air temperature below
-22° F after the engine has been running for 5 minutes. On Fleetwood the inlet air
temperature signal shows a temperature below -20° F for 5 seconds at a speed less than 44
MPH. |
24 |
When engine speed was between 1200 and 4400 RPM and throttle
position angle was less than 3%, the MAP signal showed low voltage (high manifold vacuum)
for at least 5 seconds. |
25 |
Inlet air temperature sensor signal showed an air temperature over
302° F after the engine has been running for 5 minutes. On Fleetwood the inlet air
temperature signal shows a temperature above 297° F for 5 seconds at a speed less than 44
MPH. |
26 |
Quad-Driver sense voltage shows a low voltage for 5 seconds where
battery voltage should be present, or the sense voltage shows battery voltage for 25
seconds when a low voltage should be present. (Fleetwood only) |
32 |
EGR open command did not change MAP sensor signal. Normal EGR flow
should cause slight decrease in manifold vacuum which would change MAP sensor signal. |
33 |
MAP sensor signal voltage was too high (low vacuum) for 5 seconds
when throttle opening was under 4%. |
34 |
MAP sensor signal voltage was too low (high vacuum) when engine
speed was over 1200 RPM. On Fleetwood the engine speed was over 1000 RPM with a throttle
position angle above 21%. |
41 |
The EST signal was present when the circuit should have been
grounded by the ignition module when it received bypass voltage under 1 volt. (Fleetwood
only) |
42 |
The EST signal did not change when the ECM applied bypass voltage to
the ignition module. |
43 |
The ECM did not detect a knock signal during near wide open throttle
operation with coolant temperature above 194° F or the knock signal was present for 4
seconds or more during normal engine operation. |
44 |
Oxygen sensor voltage was under 0.25 volts for 50 seconds of closed
loop operation. On Fleetwood the engine speed was over 1000 RPM with a throttle position
angle above 21%. |
45 |
Oxygen sensor voltage was over 0.75 volts for 30 seconds with a
throttle angle greater than 20%. On Fleetwood the oxygen sensor voltage was 0.75 volts for
30 seconds in a closed loop with a throttle angle either greater than 20% or less than 2%. |
46 |
Anti-Theft Pass Key signal was wrong when ignition was turned to
start position. |
51 |
PROM error. |
54 |
Fuel pump voltage was not present at fuel pump sense line for 2
seconds after the ECM has sent the fuel pump on command. |
55 |
ECM error. Replace ECM. (Except Fleetwood). |
The Diagnostic Codes and Explanations are derived
from Manufacturer supplied Technical Data. WesTech does not guarantee the accuracy of this
Information nor can it be held liable for providing it. |