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P0581-SPEED CONTROL SWITCH 1 CIRCUIT HIGH (5.7L) (CONTINUED) 3. CLOCKSPRING Disconnect the C1 and C3 Clockspring harness connector per Service Measure the resistance of the (V937) Switch Return circuit between Measure the resistance of the (V37) S/C Switch No.1 Signal circuit Was the resistance above 5.0 ohms for either circuit? Yes >> Replace the clockspring. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 4 4. (V37) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE Connect the Clockspring harness connectors per Service Information. Disconnect the C3 PCM harness connector. Ignition on, engine not running. Measure the voltage on the (V37) S/C Switch No.1 Signal circuit in the Is the voltage above 5.2 volts? Yes >> Repair the short to battery voltage in the (V37) S/C Switch No.1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 5 HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 631 |