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P1684-BATTERY WAS DISCONNECTED For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: T Battery Disconnect and/or Quick Learn procedure. Possible Causes BATTERY WAS DISCONNECTED SCAN TOOL BATTERY DISCONNECT PERFORMED PCM WAS REPLACED OR DISCONNECTED QUICK LEARN WAS PERFORMED Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation The PCM uses a battery backed RAM (Random Access Memory) is used to maintain some learned values. When Diagnostic Test 1. POSSIBLE CAUSES This DTC is an informational DTC only. This DTC is set due to a momentary loss of power and/or the ground circuits to the PCM. Below are a list of possible causes associated with this DTC. Battery was disconnected. The BATTERY DISCONNECT feature on the scan tool was performed. The QUICK LEARN feature on the scan tool was performed. PCM was replaced or disconnected. Were any of the above possible causes performed? Yes >> This is the cause of the DTC. Erase the DTC and return vehicle to customer. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 2 21 - 512 AUTOMATIC TRANSMISSION - 545RFE - ELECTRICAL DIAGNOSTICS DR/DH |