Toyota Tacoma 2015-2018 Service Manual: Front Differential Oil Temperature Sensor Circuit High (P17C8)

Toyota Tacoma 2015-2018 Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / Front Differential Oil Temperature Sensor Circuit High (P17C8)

DESCRIPTION

This DTC is output when a short to B+ or open circuit in the oil temperature sensor is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P17C8	Front Differential Oil Temperature Sensor Circuit High	Diagnosis Condition: Ignition switch turned to ON Malfunction Status: Short to B+ or open circuit in the oil temperature sensor Malfunction Time: 1 second or more Other: 1 trip detection logic	Wire harness and connector 4 wheel drive control ECU Oil temperature sensor

WIRING DIAGRAM

Refer to DTC P17C7 (See page PROCEDURE ).

PROCEDURE

1.	CHECK OIL TEMPERATURE SENSOR

(a) Disconnect the 4 wheel drive control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F13-5 (DT) - F13-25 (DGND)	Always	120 to 240 kΩ

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F13-5 (DT) or F13-25 (DGND) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to 4 Wheel Drive Control ECU)

REPLACE 4 WHEEL DRIVE CONTROL ECU

2.	CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - OIL TEMPERATURE SENSOR)

(a) Disconnect the F13 4 wheel drive control ECU connector.

(b) Disconnect the F38 oil temperature sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F13-5 (DT) - F38-1 (DT)	Always	Below 1 Ω
F13-25 (DGND) - F38-2 (DGND)	Always	Below 1 Ω

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F13-5 (DT) or F38-1 (DT) - Body ground	Ignition switch ON	Below 1 V
F13-25 (DGND) or F38-2 (DGND) - Body ground	Ignition switch ON	Below 1 V

REPLACE OIL TEMPERATURE SENSOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

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