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

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
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