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93 5.7L VIN 7 TBI
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).

93 5.7L VIN 7 TBI

Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds.

Coolant temperature sensor signal indicates a temperature of over 275° F for 2 seconds.

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.

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.

TPS voltage was under 0.2 volts when the engine was running.

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.

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.

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.

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)

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.

MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 4%.

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%.

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)

The EST signal did not change when the ECM applied bypass voltage to the ignition module.

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.

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%.

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%.

Anti-Theft Pass Key signal was wrong when ignition was turned to start position.

PROM error.

Fuel pump voltage was not present at fuel pump sense line for 2 seconds after the ECM has sent the fuel pump on command.

ECM error. Replace ECM. (Except Fleetwood).

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