Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: 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

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)

OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

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.

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

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

OK

REPLACE DIFFERENTIAL LOCK COIL

NG

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:

Lost Communication with Meter (B1324)
DESCRIPTION This DTC is stored when a communication error occurs between the navigation receiver assembly and combination meter assembly. DTC No. DTC Detection Condition Trouble Area B1324 After the navigation receiver assembly receive ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below. Lighting system DTC Code Detection Item See page ...

Headlight Relay
Inspection INSPECTION PROCEDURE 1. INSPECT HEADLIGHT RELAY (a) Check the resistance. (1) Using an ohmmeter, measure the resistance between the terminals. Standard: Tester Connection Specified Condition 3-5 10 kΩ or higher ...

© 2011-2025 Copyright www.ttguide.net