Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

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.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F13-15 (R) or D5-6 (B) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT ROOF CONSOLE BOX ASSEMBLY

(a) Remove the roof console box assembly.

  • for Double Cab: (See page ). for Access Cab: (See page ).
  • for Access Cab: (See page ). ).
Text in Illustration

*a

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

B

REPLACE ROOF CONSOLE BOX ASSEMBLY

C

REPLACE ROOF CONSOLE BOX ASSEMBLY

A

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)

OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

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 ...

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