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The Instrument cluster on 1999 and newer Mustangs can be put into a test mode that will cause diagnostic
information to be displayed on the odometer.
To enter the HEC Dealer Test Mode, depress and hold the instrument cluster SELECT/RESET button, turn the ignition switch to the RUN position, and then continue pressing the SELECT/RESET button (5 seconds) until tESt is displayed in the odometer. The SELECT/RESET button must be released within three seconds of the odometer tESt display to begin the dealer test mode. Depress the SELECT/RESET button to advance through the following steps until dtc is displayed. Depressing the SELECT/RESET button will display any stored continuous DTCs before proceeding to the next step. |
Odometer Display |
Description |
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| GAGE | Activates gauge sweep of all gauges, then displays present gauge values. Also carries out the checksum tests on ROM and EE. If the gauge sweep is inoperative, INSTALL a new instrument cluster. | ||||||||||||||||||
| All segments illuminated | Illuminates all odometer segments. If any odometer segment is inoperative INSTALL a new instrument cluster. | ||||||||||||||||||
| bulb | Illuminates all micro-controlled indicators and LEDs. Install a new indicator or LED as necessary. | ||||||||||||||||||
| r | Returns to normal operation of all micro-controlled indicators and LEDs and displays hexadecimal value for ROM level. (used when requesting assistance from the hotline). If alternating flashes for FAIL and ROM level are displayed, INSTALL a new instrument cluster. | ||||||||||||||||||
| EE | Displays the hexadecimal value for EE level (used when requesting assistance from hotline). If alternating flashes of FAIL and EE level are displayed replace instrument cluster. | ||||||||||||||||||
| dt | Displays hexadecimal coding of final manufacturing test date (used when requesting assistance from hotline). | ||||||||||||||||||
| dtc | Displays continuous DTC's in hexadecimal format. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step. See index below for description of trouble codes. | ||||||||||||||||||
| enG | Displays the English speed in MPH. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0. | ||||||||||||||||||
| m | Displays the metric speed data in kph. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0. | ||||||||||||||||||
| tAc | Displays the tachometer data received from the PCM via the SCP network within tolerances. Tachometer will indicate present RPM. Display will show 0 if input is no received, if input received is invalid for one second or more, or if engine RPM is 0. | ||||||||||||||||||
| FUEL | Displays the code
(0-255) for the fuel sender input to the HEC. The fuel gauge will
display a filtered fuel level value. This filter will keep the pointer
from moving suddenly or erratically.
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| OIL | Displays the code (0-250) for the oil pressure switch input to the HEC. Oil pressure gauge will indicate present oil pressure. Normal oil pressure (greater than 6psi) will display a value between 000 and 176. A low oil pressure or an inoperative engine oil pressure switch (less than 6 psi) will display a value greater than 176. | ||||||||||||||||||
| dEGC | Display of engine
temperature in Degrees C input from cylinder head temperature sensor.
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| bAtt | Displays the code
(0-255) for the battery voltage input to the HEC. Battery voltage
gauge will indicate present battery voltage.
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| rhEo | Displays the present decimal rheostat dimming input, 0-255 (used when requesting assistance from the hotline) | ||||||||||||||||||
| rhi rhS rho |
Not used. | ||||||||||||||||||
| Cr | Displays the current RUN/START sense input. Display will show -h for high input with the ignition switch in the START position and -L for low input with the ignition switch in the RUN position. | ||||||||||||||||||
| PA-PE7 | not used. | ||||||||||||||||||
| GAGE | Repeats the display cycle | ||||||||||||||||||
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To exit the HEC Dealer Test Mode, turn the ignition switch to the OFF position or press and hold the SELECT/RESET button for 3 or more seconds and release. |
OBD-II | HEC Dealer |
| |
Scan Tool | Test Mode |
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DTC | DTC | Description | |
| B1202 | 9202 | Fuel Sender Open Circuit | |
| B1204 | 9204 | Fuel Sender Short to Ground | |
| B1213 | 9213 | Anti-Theft Number of Programmed Keys is Below Minimum | |
| B2103 | 9232 | Antenna Not Connected - Defective Transceiver | |
| B1232 | A103 | Antenna Not Connected - Defective Transceiver | |
| B1317 | 9317 | Battery Voltage High | |
| B1318 | 9318 | Battery Voltage Low | |
| B1342 | 9342 | ECU Is Defective | |
| B1356 | 9356 | Ignition Run Circuit Open | |
| B1364 | 9364 | Ignition Start Circuit Open | |
| B1600 | 9600 | PATS Ignition Key Transponder Signal is Not Received - Damaged Key or Non -PATS Key | |
| B1601 | 9601 | PATS Received Incorrect Key-Code from Ignition Key Transponder (Unprogrammed Key) | |
| B1602 | 9602 | PATS Received Invalid Format of Key-Code From Ignition Key Transponder (Partial Key Read) | |
| B1681 | 9681 | PATS Transceiver Signal is Not Received (Not Connected, Damaged, or Wiring) | |
| B2139 | A139 | PCM ID Does Not Match Between Instrument Cluster and PCM | |
| B2141 | A141 | NVM Configuration Failure (No PCM ID Exchange Between Instrument Cluster and PCM) | |
| B2143 | A143 | NVM Memory Failure | |
| C1284 | 5284 | Oil Pressure Switch Failure | |
| U1027 | D027 | SCP Invalid or Missing Data for Engine RPM | |
| U1043 | D043 | SCP Invalid or Missing Data for Traction Control | |
| U1073 | D073 | SCP Invalid or Missing Data for Engine Coolant | |
| U1123 | D123 | SCP Invalid or Missing Data for Odometer | |
| U1147 | D147 | SCP Invalid or Missing Data for Vehicle Security | |
| U1262 | D262 | Missing SCP Message |
Source: 2000 Ford Workshop Information Manual
