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Differential

Rear Differential Lock Solenoid Circuit Low (P17C0)

In this manual: Differential
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~1min read
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

  1. 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

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