|
|
Content .. 1415 1416 1417 1418 ..
P0642-SENSOR REFERENCE VOLTAGE 1 CIRCUIT LOW (CONTINUED) For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - SCHE- For a complete wiring diagram Refer to Section 8W Theory of Operation The Sensor Supply Voltage circuit supplies a 6-volt power supply to the two input speed sensors. The Sensor Sup- • When Monitored: • Set Condition: Possible Causes SPEED SENSOR DTCS PRESENT (T72) SENSOR SUPPLY VOLTAGE SHORT TO GROUND INTERNAL SHORT IN THE ELECTROHYDRAULIC CONTROL UNIT ASSEMBLY TRANSMISSION CONTROL MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Diagnostic Test 1. CHECK FOR SPEED SENSOR DTCS With the scan tool, check for other transmission DTCs. Are there any speed sensor DTCs present? Yes >> Refer to the AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS category and perform the appropriate symptom. No >> Go To 2 21 - 478 AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS WK |