IPC Data Displays

The IPC Data Displays comprise those system input signals containing a Byte of information, generally, but not Exclusively, expressed as a value between 0 and 255 counts. The IPC Data Displays may be Called up only with the service diagnostics or scan tool.

IPD01 This displays the A/D value for the dimming potentiometer on the headlamp switch. This value can move from 0 to 155 counts under Normal operation. Significantly higher values (200 and higher) indicate problems in the circuit.
IPD02 BATTERY VOLTS is displayed in volts between 8.7 and 18.0, on Connector C1 terminals "A1" and "B1" (Controlled Power).
IPD03 The VEHICLE SPEED is shown in miles per hour between 0 and 255.
IPD04 The LOW BRAKE FLUID signal is shown in volts between 0 and 5 volts. 0 volts = low brake fluid or a short to ground in the Low Brake Fluid Switch CKT. 5v = open in Low Brake Fluid Switch CKT. Normal signal voltage is approximately 2.5 volts.
IPD05 The STEERING WHEEL CONTROLS A/D count is displayed from the four steering column lever switch resistors at input Connector C2 terminal "Bit," to decode which of eight functions is being requested. There is an invalid deadband position on each side of the eight valid A/D count/resistance values. The range of data counts is 0 to 255.
IPD06 Displays the current PASS-Key II pellet A/D value on input Connector C1 terminal "A10" key high input. Data count range is 0 to 255 counts.
IPD07 The TWILIGHT DELAY POTENTIOMETER displays the current A/D value on input Connector C1 terminal "C9." The count range is 0 to 255. This count value represents the 0 to 180 second twilight delay.
IPD08 Displays the current TWILIGHT PHOTOCELL A/D count from Connector C1 "C12." This count is used to determine exterior light/dark status. Dark is normally any count above 143 and Light is any value below 123 counts. Both values may be calibrated.
IPD09 to IPD13 Displays the current EEPROM data for Option A to Option E. The data reflects the decimal Equivalent of an 8-bit binary code. Range is 0 to 255. No units are associated with this number. Refer tp IPC Output Overrides IPS01 through IPS05 for recognized values of these options.
IPD14 The IGNITION cycle COUNTER value is the number of times that the IPC has been turned "OFF" since a IPC DTC was last detected. After 100 ignition cycles without any Malfunction being detected, all IPC DTCs are Cleared.
IPD98 The DCP SOFTWARE VERSION is software ID for one of the IPC microprocessors.
IPD99 The CPM SOFTWARE VERSION is software ID for the second IPC microprocessor.