Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

Drivetrain. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
A343F Automatic Transmission Transaxle. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - BODY GROUND)

INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)

CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - ECM)

DTC P2772 Four Wheel Drive (4WD) Low Switch Circuit Range / Performance


DESCRIPTION

The ECM detects the signal from the No. 1 transfer indicator switch (L4 position switch).
This DTC indicates that the transfer L4 position switch remains on.

DTC Code
DTC Detection Condition
Trouble Area
P2772
  1. Transfer L4 position switch remains on while vehicle is being driven under following conditions for 1.8 seconds or more (1-trip detection logic):
    1. Output shaft speed is 3000 rpm or less
    2. Transfer shift lever is in H
  1. Short in transfer L4 position switch circuit
  2. Transfer L4 position switch
  3. ECM

MONITOR DESCRIPTION

The ECM monitors the transfer L4 position switch to determine when the transfer-case L4 gear is engaged. If the L4 position switch indicates that the transfer-case L4 gears are engaged under all of the following conditions, the ECM will conclude that there is a malfunction of the transfer L4 position switch:
  1. Transfer-case shift lever is in H.
  2. Transfer-case output shaft speed is between 750 and 3000 rpm.
  3. The specified time period has elapsed.
Then the ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - BODY GROUND)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the C29 No. 1 transfer indicator switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C29-2 - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector:
    (to No. 1 Transfer Indicator Switch)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Remove the No. 1 transfer indicator switch.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - 2
    		Not pushed
    		10 kΩ or higher
    1 - 2
    		Pushed
    		Below 1 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (No. 1 Transfer Indicator Switch)
    *b
    		Pushed
    *c
    		Not pushed


NG
REPLACE NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH) (HILUX_TGN26 RM00000479C008X.html)
OK


3.CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - ECM)

  1. Disconnect the C29 No. 1 transfer indicator switch connector.

  1. Disconnect the G145 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C29-1 - G145-14 (L4)
    		Always
    		Below 1 Ω
    C29-1 or G145-14 (L4) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)