Toyota Tacoma (2015-2018) Service Manual: Automatic Disconnecting Differential Motor Control Circuit Open (P17A0)

Toyota Tacoma (2015-2018) Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / Automatic Disconnecting Differential Motor Control Circuit Open (P17A0)

DESCRIPTION

This DTC is output when an open circuit in the A.D.D. shift motor drive circuit is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P17A0	Automatic Disconnecting Differential Motor Control Circuit Open	Diagnosis Condition: While switching between 2WD and H4 (A.D.D. shift motor operating) with the ignition switch turned to ON Malfunction Status: Open circuit in the A.D.D. shift motor drive circuit Malfunction Time: 0.03 seconds or more Other: 1 trip detection logic	Wire harness and connector 4 wheel drive control ECU A.D.D. actuator (differential vacuum actuator assembly)

WIRING DIAGRAM

Refer to DTC P17A9 (See page PROCEDURE ).

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY)

(a) Disconnect the F12 4 wheel drive control ECU connector.

(b) Disconnect the A3 A.D.D. actuator (differential vacuum actuator assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F12-2 (DM1) - A3-1 (DM1)	Always	Below 1 Ω
F12-6 (DM2) - A3-2 (DM2)	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY (A.D.D. SHIFT MOTOR)

(a) Disconnect the A3 A.D.D. actuator (differential vacuum actuator assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (DM1) - 2 (DM2)	Always	1.5 to 10 Ω

Text in Illustration

*a	Component without harness connected (A.D.D. Actuator (Differential Vacuum Actuator Assembly))

REPLACE 4 WHEEL DRIVE CONTROL ECU

REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY

Invalid Data Received From Vehicle Dynamics Control Module (U0416)

DESCRIPTION This DTC is detected if a wheel speed malfunction signal is sent from the skid control ECU (brake actuator assembly). DTC No. Detection Item DTC Detect ...

Automatic Disconnecting Differential Motor Limit Switch Circuit (P17A4)

DESCRIPTION When the A.D.D. actuator switches between 2WD and 4WD, the DL1 and DL2 terminals of the limit switch and ADD terminal of the A.D.D. position switch change to one of the following ON/O ...

Other materials:

Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION (a) Whenever a forward recognition camera system DTC is stored, the forward recognition camera stores the current vehicle state (ECU and sensor information) as Freeze Frame Data. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the ignit ...

Rear Axle Hub Bolt
Installation INSTALLATION PROCEDURE 1. INSTALL REAR AXLE HUB BOLT (a) Install a new hub bolt through the axle hub. (b) Install the washer plate, as shown in the illustration, through the hub bolt, and install the hub bolt by tightening the hub nut. 2. APPLY HIGH TEMPERATURE GREASE 3. ...

Transmission Fluid Temperature Sensor "B" Circuit Low Input (P2742,P2743)
DESCRIPTION The No. 2 ATF temperature sensor is installed in the transmission valve body assembly. If the ECM detects an abnormally high ATF temperature near this sensor, it illuminates the warning indicator. HINT: The temperature of ATF easily rises when towing, climbing hills, in ...