No Response From PCM (PCI BUS)

NOTE: After making any repairs, perform POWERTRAIN CONTROL MODULE VERIFICATION TEST under VERIFICATION TESTS.

Connect scan tool to Data Link Connector (DLC), under lower left side of instrument panel. Turn ignition on. Using scan tool, select BODY, BODY COMPUTER, then ANTI-LOCK BRAKES. Select BODY, then ELECTRO/MECHANICAL CLUSTER (MIC). Select PASSIVE RESTRAINTS, then AIRBAG. If scan tool was able to identify or communicate with any of these modules, go to next step. If scan tool was not able to identify or communicate with any of these modules, see PCI BUS COMMUNICATION FAILURE .
Using scan tool, attempt to display PCM DTCs (this will ensure power and ground circuits to PCM are operational). If scan tool is able to display PCM DTCs, go to next step. If scan tool is not able to display PCM DTCs, see NO RESPONSE FROM PCM (SCI ONLY) .
Turn ignition off. Disconnect Gray 32-pin PCM connector C3. PCM is located in right side of engine compartment. See Figure . Connect Scope Input Cable (CH7058) to channel one connector on scan tool. Connect Cable-To-Probe Adapter (CH7062) and Black and Red test probes to scope input cable. Connect Red test probe to PCI BUS circuit at Gray 32-pin PCM connector C3 terminal No. 30 (Violet/Yellow wire). See Figure . Backprobe PCM ground using Black test probe of lab scope at Black 32-pin PCM connector C1 terminal No. 31 or 32 (Black/Tan wires).
Using scan tool, select PEP MODULE TOOLS, LAB SCOPE, LIVE DATA. Select 12 VOLT SQUARE WAVE. Press F2 for SCOPE. Press F2 and use DOWN arrow to set voltage scale to 20 volts. Press F2 again when complete. Turn ignition on. If reading on lab scope toggles between zero and 7.5 volts, replace PCM. See POWERTRAIN CONTROL MODULE under REMOVAL & INSTALLATION. If reading on lab scope does not toggle between zero and 7.5 volts, repair open in PCI BUS circuit (Violet/Yellow wire).