Toyota Tacoma manuals

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

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

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Other materials:

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