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

Toyota Tacoma (2015-2018) Service Manual: 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

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

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)
OK

REPLACE 4 WHEEL DRIVE CONTROL ECU
NG

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.

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

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
OK

REPLACE OIL TEMPERATURE SENSOR
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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