Toyota Camry (XV70): Transmission Fluid Temperature Sensor "A" Circuit Short To Ground (P071011)
DESCRIPTION
The ATF temperature sensor converts the automatic transaxle fluid (ATF) temperature into a resistance value for use by the ECM.
The ECM applies voltage to the temperature sensor through terminal THO1 of the ECM.
The sensor resistance changes with the ATF temperature. As the temperature rises, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature rises.
The ECM calculates the ATF temperature based on the voltage signal.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Memory |
Note |
|---|---|---|---|---|---|---|
| P071011 |
Transmission Fluid Temperature Sensor "A" Circuit Short To Ground |
When the battery voltage is 8 V or more and the engine switch is on (IG), the ATF temperature sensor voltage is less than 0.142 V for 0.5 seconds. (1-trip detection logic) |
| Comes on |
DTC stored | SAE Code: P0712 |
MONITOR DESCRIPTION
This DTC indicates a short to ground in the ATF temperature sensor circuit. The ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and can detect a short to ground in the ATF temperature sensor circuit. If the resistance value of the ATF temperature sensor is below 79 Ω*, the ECM interprets this as a malfunction of the ATF temperature sensor or in the wire harness, illuminates the MIL and stores this DTC.
*: 150
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Fail-safe Chart
FAIL-SAFE CHART Description The fail-safe function minimizes the loss of operation when a malfunction occurs in a sensor or solenoid.
Fail-safe (a) Fail-safe control list:
Malfunctioning Part Function
Transmission Revolution Sensor (NT)
Lock up clutch control is prohibit
Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE BRAKE VACUUM CHECK VALVE ASSEMBLY
(a) Remove the brake vacuum check valve assembly from the brake booster assembly.
(b) Remove the check valve grommet from the brake booster assembly. 2. REMOVE VACUUM WARNING SWITCH ASSEMBLY
(a) Remove the vacuum warning switch
