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P0579-SPEED CONTROL SWITCH 1 PERFORMANCE (CONTINUED) 2. SPEED CONTROL SWITCH Turn the ignition off. Remove and disconnect the Speed Control Switches from the steering wheel per Service Information. Measure the resistance across each Speed Control Switch. Monitor the ohmmeter while pressing each function button on each switch. The following resistance specs are taken between terminals (V371) S/C Switch No.1 Signal and (V397) S/C Switch Not pressing any switch - 20.5 kohms On/Off - 0.47 kohms Set - 5.49 kohms Coast - 2.94 kohms Cancel - 1.24 kohms Resume/Accel - 15.4 kohms Does the function on the Speed Control Switches have the correct resistance value? Yes >> Go To 3 No >> Replace the Speed Control Switch that had the incorrect resistance value. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 3. (V371) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE Disconnect the C3 PCM harness connector. Disconnect the C3 Steering Column Control Module harness connec- Ignition on, engine not running. Measure the voltage on the (V371) S/C Switch No.1 Signal circuit in Is the voltage above 0 volts? Yes >> Repair the short to battery voltage in the (V371) S/C Switch No.1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 4 9 - 628 ENGINE ELECTRICAL DIAGNOSTICS WK |