Toyota Tacoma (2015-2018) Service Manual: Rear Differential Lock Solenoid Circuit Low (P17C0)

Toyota Tacoma (2015-2018) Service Manual / Differential / Differential System(w/ Rear Differential Lock) / Rear Differential Lock Solenoid Circuit Low (P17C0)

DESCRIPTION

This DTC is output when a malfunction is detected due to a short to ground occurring in the differential lock coil drive circuit of the rear differential.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P17C0	Rear Differential Lock Solenoid Circuit Low	Diagnosis Condition: Directly after ignition switch is turned to ON, or when rear differential is switched between free and locked (differential lock coil operating) with ignition switch turned to ON Malfunction Status: Short to ground in differential lock coil drive circuit Malfunction Time: 0.05 seconds or more Other: 1 trip detection logic	Wire harness and connector 4 wheel drive control ECU Differential lock coil

WIRING DIAGRAM

PROCEDURE

1.	CHECK DIFFERENTIAL LOCK COIL

(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
F12-1 (SL+) or F12-5 (SL-) - Body ground	Always	10 kΩ or higher

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 - DIFFERENTIAL LOCK COIL)

(a) Disconnect the F12 4 wheel drive control ECU connector.

(b) Disconnect the D28 differential lock coil connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F12-1 (SL+) or D28-2 (SL+) - Body ground	Always	10 kΩ or higher
F12-5 (SL-) or D28-1 (SL-) - Body ground	Always	10 kΩ or higher

REPLACE DIFFERENTIAL LOCK COIL

REPAIR OR REPLACE HARNESS OR CONNECTOR

Invalid Data Received from Vehicle Dynamics Control Module (U0416)

DESCRIPTION This DTC is detected if a wheel speed malfunction signal is sent from the skid control ECU (brake actuator assembly). DTC No. Detection Item DTC Detect ...

Rear Differential Lock Solenoid Circuit High (P17C1)

DESCRIPTION This DTC is output when a malfunction is detected due to a battery short occurring in the differential lock coil drive circuit of the rear differential. DTC No. D ...

Other materials:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by check ...

Seat Position Sensor
Components COMPONENTS ILLUSTRATION On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SEAT POSITION AIRBAG SENSOR (for Vehicle not Involved in Collision) (a) Perform a diagnostic system check (See page ). 2. INSPECT SEAT POSITION AIRBAG SENSOR (for Vehicle Involved in C ...

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL REAR AXLE HUB BOLT (a) Install a new deflector gasket and deflector onto the rear axle shaft. HINT: Align the 2 notches. (b) Install the 6 bolts through the axle hub. ...