LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Testing & Diagnosis (REATTA, Riviera, TORONADO & TROFEO) >> Entering Self-Diagnostics

Entering Self-Diagnostics

NOTE: It will be necessary to enter service mode to use Reatta, Riviera, Toronado and Trofeo TCC test charts. Enter appropriate test condition (i.e., ECM INPUTS, BCM CODE, etc.) as indicated in charts.
  1. On Reatta and Riviera, turn ignition switch on. Simultaneously depress OFF and TEMP buttons on the Electronic Climate Control Panel (ECCP). See Figure. Continue to depress OFF and TEMP buttons until all segments and bulbs of the Instrument Panel Cluster (IPC), the Driver Information Center (DIC) and ECCP illuminate. When all segments are lit, system has entered self-diagnostic mode. Release OFF and TEMP buttons. Go to step 4).
  2. On Toronado and Trofeo, turn ignition switch on. On models without Cathode Ray Tube (CRT), simultaneously depress OFF and WARM buttons on the Electronic Climate Control Panel (ECCP). On CRT equipped vehicles, simultaneously push OFF button and touch WARM key on CRT monitor control panel. See Figure.
  3. On both non-CRT and CRT monitor equipped vehicles, continue to depress OFF and WARM button/key until all segments and bulbs of the IPC, the Driver Information Center (DIC) and ECCP illuminate. See Figure. When all segments are lit, system has entered self-diagnostic mode. Release OFF and WARM button/key.
  4. On all models, illuminating the segments of the IPC, DIC and ECCP ensures all display segments are working properly. If all segments illuminate, proceed to DISPLAYING TROUBLE CODES . Failure of any segment to illuminate may result in inaccurate test results. All inoperative segments of the display must be made to operate before proceeding with self-diagnostic procedures.
  5. Partial segment check is possible by depressing TEST button on IPC when vehicle is in Park or Neutral. Holding button depressed will light all vacuum fluorescent displays and all telltales on IPC in order to check for faulty bulbs or panels.
CAUTION: Accessing self-diagnostics for 30 minutes or longer without running engine will cause battery to discharge, resulting in a possible no-start condition and faulty diagnostic readings. To ensure proper operation, attach battery charger to battery.
scientia non olet · About LEMON Manuals