ECM Data Display

WARNING: This page is about a different car, the 1989 Cadillac Fleetwood and 1989 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

Enter diagnostics. With ".7.0" displayed on FDP, depress and release "LO" button on ECCP. "E.9.0" should appear. It is possible to leave data series at any time and return to ".7.0" by clearing ECM/BCM codes.
To advance display, depress "HI" button on ECCP. To return to a lower numbered parameter or jump directly from "E.9.0" to end of parameter list "P.1.7", depress "LO" button on ECCP.
Data parameter numbers will be displayed for one second on FDC, followed by numerical value. The parameter value (range) will be displayed for 9 seconds. Each parameter and value will be repeated until manually advanced to next parameter.
Parameters will vary with environmental and operating conditions. When trouble shooting a malfunction, ECM data display can be used to compare vehicle with a vehicle that is functioning properly. A summary of parameters with ranges and display units is contained in the ECM DATA PARAMETERS table below.

ECM DATA PARAMETERS

Display

Parameter

Range

P.0.1

TPS

-10 to 90°

P.0.2

MAP

14-109 kPa

P.0.3

BARO

61-103 kPa

P.0.4

Coolant Temp.

-40 to 151°C

P.0.5

MAT

-40 to 151°C

P.0.6

Injector Pulse

0-99.9 ms

P.0.7

Oxygen Sensor

0-1.14 volts

P.0.8

Spark Advance

-30 to 60°

P.0.9

Ignition Cycles

0-50

P.1.0

Battery Volts

0-25.5 volts

P.1.1

Engine RPM

⁽¹⁾ 0-6370

P.1.2

Vehicle Speed

0-255 MPH

P.1.3

Cross Counts

0-255

P.1.4

Fuel Integrator

0-255

P.1.5

Trans. Temp.

-40 to 215°C

P.1.6

Calibration Module

⁽²⁾ 0-1

P.1.7

PROM I. D.

⁽³⁾

⁽¹⁾	RPM reading on FDC is 10 percent of actual RPM.

⁽²⁾	0=Not expired, 1=Expired.

⁽³⁾	Displayed as a number up to 3 digits long.