Toyota Tacoma 2015-2018 Service Manual: Rear Differential Lock Control SW Stuck ON (P17CC)

Toyota Tacoma 2015-2018 Service Manual / Differential / Differential System(w/ Rear Differential Lock) / Rear Differential Lock Control SW Stuck ON (P17CC)

DESCRIPTION

This DTC is output when a malfunction of the differential lock switch is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P17CC	Rear Differential Lock Control SW Stuck ON	Diagnosis Condition: Directly after the ignition switch is turned to ON, or when the ignition switch is ON Malfunction Status: Differential lock switch stuck ON Malfunction Time: 0.3 seconds or more when the ignition switch is turned to ON, or 60 seconds or more with the ignition switch ON Other: 1 trip detection logic	Wire harness and connector 4 wheel drive control ECU Differential lock switch

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL LOCK SWITCH)

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

(b) Disconnect the D5 differential lock switch connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F13-15 (R) or D5-6 (B) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT ROOF CONSOLE BOX ASSEMBLY

(a) Remove the roof console box assembly.

for Double Cab: (See page ).
for Access Cab: (See page ).

Text in Illustration

Component without harness connected

(Roof Console Box Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R44-6 (B) - 6 (B)	Always	Below 1 Ω
R44-12 (GND)- 3 (E)	Always	Below 1 Ω

Result

Result	Proceed to
OK	A
NG (for Double Cab)	B
NG (for Access Cab)	C

REPLACE ROOF CONSOLE BOX ASSEMBLY

3.	INSPECT DIFFERENTIAL LOCK SWITCH

(a) Disconnect the D5 differential lock switch connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
6 - 3	Switch not pressed	10 kΩ or higher

Text in Illustration

*a	Component without harness connected (Differential Lock Switch)

REPLACE 4 WHEEL DRIVE CONTROL ECU

REPLACE DIFFERENTIAL LOCK SWITCH

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 ...

Rear Differential Lock Position SW Stuck OFF (P17BB)

DESCRIPTION This DTC is output when an OFF malfunction of the differential lock indicator switch is detected. DTC No. Detection Item DTC Detection Condition ...

Other materials:

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. Detection Item DTC Detection Condition Trouble Area P17C1 ...

Lost Communication with ECM / PCM "A" (U0100,U0122)
DESCRIPTION This DTC is output when communication is lost with the skid control ECU (brake actuator assembly) or ECM. DTC No. Detection Item DTC Detection Condition Trouble Area U0100 Lost Communication with ECM / PCM " ...

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for both the LH and RH sides. The procedure described below is for the LH side. PROCEDURE 1. REMOVE NO. 1 FRONT WHEEL OPENING EXTENSION PAD (w/ Front Spoiler) 2. SEPARATE FRONT FENDER LINER (a) Remov ...