Ground Circuits

Ground circuits for PCM are located at PCM terminals No. 24, 25, 33, 76, 77 and 103. PCM is located in right rear of engine compartment. To check PCM ground circuits, check for continuity between ground and PCM ground terminals. See TEST EQUIPMENT in PIN VOLTAGE/PID VALUE CHARTS article for equipment to be used. If continuity does not exist, locate and repair open in ground circuit as necessary. See appropriate wiring diagram in WIRING DIAGRAMS article.