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:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the power mirror control system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. When installing a new front fender wheel opening moulding or quarter panel wheel opening moulding, heat the vehicle body and front fender ...

Fail-safe Chart
FAIL-SAFE CHART If there is a problem with sensor signals or actuator systems, the skid control ECU prohibits power supply to the brake actuator assembly and informs the ECM of a VSC system malfunction. The brake actuator assembly turns off the solenoids and the ECM stops its ...