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P0218-HIGH TEMPERATURE OPERATION ACTIVATED For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - SCHE- For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes ENGINE COOLING SYSTEM OPERATION TRANSMISSION OIL COOLER PLUGGED HIGH TEMPERATURE OPERATIONS ACTIVATED Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation If the transmission oil temperature rises above 115 C (240 F), the overheat shift schedule is activated refer to Trans- Diagnostic Test 1. CHECK ENGINE COOLING SYSTEM Perform Engine Cooling System diagnostics per the Service Information. Is the Engine Cooling System functioning properly? Yes >> Go To 2 No >> Repair the cause of the engine overheating. Refer to the Service Information for the related diagnostic or repair procedures. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. 2. TRANSMISSION OIL COOLER RESTRICTED Check the Transmission Oil Cooler Flow in accordance with the Service Information. Is the transmission oil cooler restricted or plugged? Yes >> Go To 3 No >> Repair or replace the Transmission Oil Cooler per the Service Information. Repair the cause of the plugged Transmission Oil Cooler as necessary. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. HB AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS 21 - 9 |