PRE-RELEASE
DTC P0218
| DTC P0218 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptor |
DTC P0218
Transmission Fluid Overtemperature
| Circuit/System Description |
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC) control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly.
| Conditions for Running the DTC |
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The ignition voltage is 8.6 volts or greater.
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The TFT is -39 to +149°C (-38 to +300°F) for 5 seconds.
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| Conditions for Setting the DTC |
The TFT is 140°C (284°F) or greater for 1 minute.
| Action Taken When the DTC Sets |
DTC P0218 is a Type C DTC.
| Conditions for Clearing the DTC |
DTC P0218 is a Type C DTC.
| Diagnostic Aids |
If driver information center (DIC) is installed "TRANSMISSION HOT - idle engine" is shown when TFT reaches 132°C (270°F). TFT on the diagnostic tool should increase steadily to a normal operating temperature and then stabilize. Ask about the customer's driving habits, trailer towing, etc. Trailer towing should occur in D4. Ensure the engine cooling system is functioning normally.
| Reference Information |
Schematic Reference
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Automatic Transmission Controls Schematics
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Park - Engine Running
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Fluid Passages
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Description and Operation
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Transmission General Description
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Transmission Indicators and Messages
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Review the Failure Records when the DTC set. Verify the engine coolant temperature is less than 125°C (257°F).
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| 2. |
If greater than the specified range, refer to
Engine Overheating
.
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| 3. |
Inspect the transmission cooling system for restrictions or damage.
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| 4. |
Perform the
Transmission Fluid Level and Condition Check
to verify correct fluid level and condition.
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| 5. |
Perform the
Transmission Fluid Cooler Flushing and Flow Test
to verify proper transmission oil cooler flow.
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| 6. |
Perform the
Line Pressure Check
to verify proper transmission line pressure.
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| 7. |
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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| Repair Instructions |
| Note | ||
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Perform the Resetting of the transmission's adaption every time a transmission component is serviced. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
