TTGuideTacoma manuals & technical reference
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)

Toyota Tacoma (2015-2018) Service Manual: 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

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.

(c) for Hydraulic Brake Booster:

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
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

CHECK TRANSFER SHIFT ACTUATOR ASSEMBLY

(a) Turn the ignition switch to ON.

(b) Turn the transfer position switch to L4.

(c) Turn the ignition switch off.

(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)
OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

    Related Tacoma materials

    Steering Angle Sensor Communication Stop Mode
    DESCRIPTION Detection Item Symptom Trouble Area Steering Angle Sensor Communication Stop Mode Either condition is met: Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "C ...

    Stop & Start System: Operation and Conditions
    The Stop & Start system automatically shuts off and restarts the engine in response to brake pedal or shift lever operation while the vehicle is stationary, such as when waiting at a traffic light or intersection. By reducing unnecessary engine idling, the system is designed to improve fuel econ ...

    Security Indicator Light Does not Blink
    DESCRIPTION The transponder key ECU assembly blinks the security indicator light when the immobiliser is set (no key is in the ignition key cylinder). w/ Theft Deterrent System: The main body ECU (multiplex network body ECU) blinks the security indicator light when the thef ...