AF40-6 (MDK) - Automatic Transmission
DTC P0711-P0713
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0711
- Transmission Fluid Temperature Sensor Performance
DTC P0712
- Transmission Fluid Temperature Sensor Circuit Low Voltage
DTC P0713
- Transmission Fluid Temperature Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The automatic transmission fluid temperature sensor provides transmission fluid temperature to the transmission control module (TCM). The TCM supplies a 5 V reference signal to the sensor. The automatic transmission fluid temperature sensor is a variable resistor that measures the temperature of the transmission fluid, the value changes when the temperature changes. The sensor has a negative temperature coefficient. This means that as the temperature increases the resistance decreases and vice versa. The TCM will compare the temperature difference between the engine coolant temperature sensor and the automatic transmission fluid temperature sensor to determine if the temperatures are within an acceptable operating range of each other. This fault is handled inside the TCM and no external circuits are involved.
Conditions for Running the DTC
P0711
* The ignition voltage is 10.2-15.5 V.
* The engine speed is greater than 400 RPM for 2 s.
* TCM communication is normal.
* DTCs P0712, P0713 not set.
* The transmission is not in emergency mode.
* The engine speed is greater than 400 RPM for 10 min.
* Vehicle speed was 40 km/h (25 MPH) or greater at once.
P0712
* The ignition voltage is 10.2-15.5 V.
* The engine speed is greater than 400 RPM for 2 s.
* The transmission is not in emergency mode.
* Driving in D range.
* TCM communication is normal.
P0713
* The ignition voltage is 10.2-15.5 V.
* The engine speed is greater than 400 RPM for 2 s.
* The transmission is not in emergency mode.
* Driving in D range.
* Driving time is more than 10 min.
* TCM communication is normal.
Conditions for Setting the DTC
P0711
The automatic transmission fluid temperature is less than 20°C (68°F) after 10 min driving or more.
P0712
The automatic transmission fluid temperature is more than 200°C (392°F) for 10 s or more after consecutive 6 times.
P0713
The automatic transmission fluid temperature is lower than -55°C (-67°F) for 1 s or more after consecutive 12 times.
Action Taken When the DTC Sets
* The TCM will default the transmission oil temperature to 80°C (176°F).
* No lock-up slip control
* No neutral control
* No self learning control
Conditions for Clearing the DTC
P0711, P0712, and P0713
These are Type C DTCs.
P0712, P0713
The automatic transmission fluid temperature is between 20-150°C (68-302°F) for 10 s or more.
Diagnostic Aids
A correct transmission fluid level is required for a proper function. The automatic transmission fluid temperature sensor is located inside the transmission at the valve body. To ensure that the shown oil temperature is correct, measure the oil temperature with an external thermometer.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics AF40-6 (MDK) - Automatic Transmission
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Transmission Component and System Description Transmission Component and System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Verify that the fluid level is correct, refer to Transmission Fluid Drain and Fill Transmission Fluid Drain and Fill.
• If the fluid level is not correct
Refer to Fluid Leak Diagnosis Fluid Leak Diagnosis
• If the fluid level is correct
2. Engine idling at operating temperature, observe the scan tool Transmission Fluid Temperature parameter.
3. Verify the reading should be between -40 to +215°C (-40 to +419°F) and change.
• If the reading not between -40 to +215°C (-40 to +419°F) and does not change
Refer to Circuit/System Testing
• If the reading between -40 to +215°C (-40 to +419°F) and change
4. Operate the vehicle at about 60 km/h (37 MPH) for 10 min.
5. Verify the scan tool Transmission Fluid Temperature parameter varies by more than 2°C (35°F) to verify that the sensor is not stuck.
• If the Fluid Temperature parameter varies not more than 2°C (35°F)
Refer to Circuit/System Testing
• If the Fluid Temperature parameter varies more than 2°C (35°F)
6. Operate the vehicle within the Conditions for Running the DTC. It may be helpful to operate the vehicle within the conditions identified from the Freeze Frame/Failure Records data.
7. Verify the DTC do not set.
• If the DTC is set
Refer to Circuit/System Testing
• If the DTC is not set
8. All OK.
Circuit/System Testing
Note: Circuit/System Verification must be performed before proceeding with Circuit/System Testing.
1. Ignition OFF, and all vehicle systems OFF. Remove the K71 Transmission Control Module to disconnect the X2 harness connector. It may take up to 2 min for all vehicle systems to power down.
2. Test for infinite resistance between the low reference circuit terminal 7 and ground.
• If less than infinite resistance
Replace the wiring harness.
• If infinite resistance
3. Ignition OFF.
4. Test for infinite resistance between the signal circuit terminal 8 and ground.
• If less than infinite resistance
Replace the wiring harness.
• If infinite resistance
5. Test for infinite resistance between each terminal at the X2 harness connector and the terminals listed below:
* Low reference circuit terminal 7
* Signal circuit terminal 8
• If less than infinite resistance
Replace the wiring harness.
• If infinite resistance
6. Test for the resistance between the B13 Transmission Fluid Temperature Sensor signal circuit terminal 8 and the low reference circuit terminal 7. Refer to Transmission Fluid Temperature Sensor Specifications Pressure, Vacuum and Temperature Specifications for the resistance values.
• If the resistance value does not match with the Transmission Fluid Temperature Sensor Specifications
Replace the control valve body.
• If the resistance value match with the Transmission Fluid Temperature Sensor Specifications
7. Replace the K71 Transmission Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Wiring harness replacement, refer to Automatic Transmission Wiring Harness Replacement Service and Repair.
* Control valve body replacement, refer to Control Valve Body Replacement Control Valve Body Replacement
* Refer to Control Module References Control Module References for TCM replacement, programming and setup.
* Perform the Transmission Adaptive Functions Transmission Adaptive Functions.