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Home >> GMC >> 1995 >> Forward Control 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Generator & Regulator) >> Self-Diagnostic System >> DRB Test Functions >> READ TROUBLE CODES Mode
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READ TROUBLE CODES Mode

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

This function allows the user to read and erase trouble codes. A trouble code counter will appear along with trouble code displayed on DRB. For example, DRB will display 1 OF 4 TROUBLE CODES. PCM will store up to 8 trouble codes. Trouble codes are numbered in reverse order of their setting. The most recent trouble code to occur will be number one. Vehicles without A/C will always have A/C CLUTCH RELAY CKT (circuit) stored in memory. This trouble code will always be number one if vehicle is not equipped with A/C. If no trouble codes are stored, DRB will display NO TROUBLE CODES DETECTED and start counter will show 0 STARTS SINCE ERS.

A start counter will appear below DRB trouble code counter display. Start counter counts number of times vehicle has started since trouble code(s) was set, erased or battery was disconnected. This helps determine if failure is intermittent. Memory space limits start counter to first 3 trouble codes. Start counter of zero equals a hard trouble code. Start counter number more than one indicates an intermittent trouble code. Start counter will count up to 255 starts. If no trouble codes are stored, DRB will display NO TROUBLE CODES DETECTED and start counter will show 0 STARTS SINCE ERS.