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P0580-SPEED CONTROL SWITCH 1 CIRCUIT LOW (CONTINUED) 10. SPEED CONTROL SWITCH VOLTAGE VALUES Allow the engine to idle. With a scan tool, monitor the S/C Switch voltage readings. SWITCH POSITION SWITCH No.1 VOLTAGE VALUE SWITCH No.2 VOLATGE VALUE NO SWITCHES PRESSED 4.31 to 4.78 volts 4.31 to 4.78 volts ON/OFF PRESSED 0.59 to 1.13 volts 3.53 to 3.92 volts RES/ACCEL PRESSED 3.88 to 4.17 volts 2.04 to 2.47 volts SET PRESSED 3.16 to 3.56 volts 1.17 to 1.56 volts COAST PRESSED 2.57 to 2.94 volts 0.77 to 1.09 volts CANCEL PRESSED 1.59 to 1.99 volts 2.84 to 3.25 volts Take these same voltage measurements with a voltmeter by back probing the (V371) S/C Switch No.1 Signal circuit Compare the voltage readings on the voltmeter to what the scan tool displayed. Are the voltage readings out of the listed specification and is there less than a 0.2 of a volt difference Yes >> Replace the Speed Control Switch. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 11 11. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 640 ENGINE ELECTRICAL DIAGNOSTICS WK |