Workshop Manual

7A1–40
TRANSMISSION CONTROL SYSTEM (4L30–E)
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
Step Action Yes No
1 Were you sent here from the “Powertrain On–Board Diagnostic
(OBD) System Check”?
Go to Step 2
Go to OBD
System Check
Refer to
Driveability and
Emission in
Engine section
2 Perform the transmission fluid checking procedure.
Refer to Checking Transmission Fluid Level and Condition in
Automatic Transmission (4L30–E) section.
Was the fluid checking procedure performed?
Go to Step 3
Refer to
Checking
Transmission
Fluid Level and
Condition in
Automatic
Transmission
(4L30–E) section
3 1. Install the scan tool.
2. With the engine “off”, turn the ignition switch “on”.
NOTE: Before clearing DTC(s), use the scan tool to record “Freeze
Frame” and “Failure Records” for reference, as data will be lost
when the “Clear Info” function is used.
3. Record the DTC “Freeze Frame” and “Failure Records”.
Does the scan tool display a TFT sensor signal voltage greater
than 4.86 volts?
Go to Step 4
Go to Diagnostic
Aids
4 1. Turn the ignition “off”.
2. Disconnect the transmission 7–way connector E–42.
3. Install a fused jumper wire from terminal E42–4(F) to
E42–1(E) on the engine harness.
4. Turn the ignition “on”.
Does the TFT signal voltage drop to less than 0.4 volts? Go to Step 5 Go to Step 10
5 1. Turn the ignition “off”.
2. Using the J39200 DVOM, measure the resistance between
terminals E42–4(F) and E42–1(E).
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 6
6 1. Disconnect the transmission 7–way connector E–42.
2. Using the J39200 DVOM, measure the resistance between
terminals E42–4(F) and E42–1(E).
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 7
7 1. Remove the transmission oil pan.
2. Check the internal wiring harness for an open. Refer to
Transmission Oil Temperature Sensor (Main Case) in
Automatic Transmission (4L30–E) section.
Was a problem found and corrected?
Go to Step 14 Go to Step 8
8 1. Disconnect the internal wiring harness at the TFT sensor.
2. Measure the resistance of the TFT sensor.
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 9
9 Replace TFT sensor. Refer to Transmission Oil Temperature
Sensor (Main Case) in Automatic Transmission (4L30–E) section.
Is the replacement complete?
Go to Step 14 —