Toyota Tacoma 2015-2018 Service Manual: Four Wheel Drive (4WD) Low Switch Circuit Range / Performance (P2772)

Toyota Tacoma 2015-2018 Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / Four Wheel Drive (4WD) Low Switch Circuit Range / Performance (P2772)

DESCRIPTION

This DTC is output when a malfunction in the L4 detection switch is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
P2772	Four Wheel Drive (4WD) Low Switch Circuit Range / Performance	Diagnosis Condition: Ignition switch turned to ON (3 seconds elapse after ignition switch is turned to ON) Malfunction Status: L4 detection switch is stuck OFF when the vehicle is in L4 Malfunction Time: 10 seconds or more Other: 1 trip detection logic	Wire harness and connector 4 wheel drive control ECU Transfer shift actuator assembly

WIRING DIAGRAM

PROCEDURE

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

(a) Disconnect the F13 4 wheel drive control ECU connector.

(b) Disconnect the T4 transfer shift actuator assembly connector.

Disconnect the S1 skid control ECU (Master Cylinder Solenoid) connector.

for Vacuum Brake Booster:

Disconnect the S1 skid control ECU (brake actuator assembly) connector.

(d) for 2TR-FE:

Disconnect the E21 ECM connector.

for 2GR-FKS:

Disconnect the E13 ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F13-3 (4WDL) - T4-9 (L4)	Always	Below 1 Ω
T4-10 (GND) - Body ground	Always	Below 1 Ω
F13-3 (4WDL) or T4-9 (L4) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK TRANSFER SHIFT ACTUATOR ASSEMBLY

(a) Turn the ignition switch to ON.

(b) Turn the transfer position switch to L4.

(d) Disconnect the T4 transfer shift actuator assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
9 (L4) - 10 (GND)	Always	Below 1 Ω

Text in Illustration

*a	Component without harness connected (Transfer Shift Actuator Assembly)

REPLACE 4 WHEEL DRIVE CONTROL ECU

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

Front Differential Oil Temperature Sensor Circuit High (P17C8)

DESCRIPTION This DTC is output when a short to B+ or open circuit in the oil temperature sensor is detected. DTC No. Detection Item DTC Detection Condition ...

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 ...

Other materials:

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. (a) Turn the ignition switch to ON. (b) When the driver seat belt is not fastened, check th ...

Rear Body Side Panel Protector
Components COMPONENTS ILLUSTRATION ILLUSTRATION Installation INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. INSTALL REAR BODY SIDE PANEL PROTECTOR (a) for Sho ...

Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the lane departure alert system is not functioning properly, the driver is warned by the lane departure alert indicator and multi-information display warning message on the combinat ...