Toyota Tacoma Quiz
Differential

Rear Differential Lock Control SW Stuck ON (P17CC)

In this manual: Differential
Introduction — 15Maintenance — 8Audio / Video — 94Garage Door Opener — 7Navigation / Multi Info Display — 84Park Assist / Monitoring — 86Brake — 50Brake Control / Dynamic Control Systems — 165Parking Brake — 52gr-fks Charging — 252gr-fks Cooling — 212gr-fks Emission Control — 132gr-fks Engine Control — 322gr-fks Engine Mechanical — 332gr-fks Exhaust — 92gr-fks Fuel — 422gr-fks Ignition — 62gr-fks Intake — 72gr-fks Lubrication — 152gr-fks Starting — 38Ac60e Automatic Transmission / Transaxle — 146Axle — 19Clutch — 20Cruise Control — 168Differential — 50Drive Shaft — 6Propeller Shaft — 23Rc62f Manual Transmission / Transaxle — 34Suspension — 22Tire And Wheel — 39Vf2cm Transfer — 44Can Communication — 45Multiplex Communication — 20Power Distribution — 5Power Steering — 29Steering Column — 29Air Conditioning — 108Door Lock — 88Engine Hood / Door — 16Engine Immobiliser — 47Exterior — 55Horn — 5Interior — 18Interior Panel — 8Lighting — 93Meter / Gauge / Display — 31Mirror — 22Other System — 24Pre-collision — 40Seat — 52Seat Belt — 40Sliding Roof — 26Supplemental Restraint Systems — 139Theft Deterrent — 20Window / Glass — 53Wiper / Washer — 24
~2min read
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

  1. 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

  1. 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

Test yourself

A quick Toyota Tacoma quiz: every answer comes with an explanation and a link to the manual page.