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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (V72) S/C SWITCH 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE (V937) S/C SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE (V72) S/C SWITCH 2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE (V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE (V72) S/C SWITCH 2 SIGNAL CIRCUIT SHORTED TO GROUND SPEED CONTROL SWITCH ENGINE CONTROL MODULE (ECM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. S/C SWITCH VOLTAGES OUT OF RANGE KEY SIGNAL 1 SIGNAL 2 LO LIMIT HI LIMIT LO LIMIT HI LIMIT RELEASED 4.36 4.69 4.36 4.69 ON-OFF 0.50 1.10 3.53 3.90 SET 3.16 3.53 1.56 1.18 RESUME-ACCEL 3.84 4.19 1.70 2.43 CANCEL 1.59 1.97 2.43 3.22 Turn the ignition on. With the scan tool, monitor the S/C Switch signal voltages. Press each button while noting the voltage readings for each circuit. Are the S/C Switch voltages within the ranges specified in the table when each button is pressed? Yes >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 2 PM ENGINE ELECTRICAL DIAGNOSTICS - DIESEL 9 - 1203 |