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

Drivetrain. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
A750F 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

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

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


DESCRIPTION

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

DTC No.
DTC Detection Conditions
Trouble Area
P2772
The No. 1 transfer indicator switch remains on while the vehicle is being driven under the following conditions for 1.8 seconds or more (1 trip detection logic):
  1. Output shaft speed is between 750 and 3000 rpm.
  2. Transfer shift lever position is in H.
  1. Short in No. 1 transfer indicator switch (the transfer L4 position switch) circuit
  2. No. 1 transfer indicator switch
  3. TCM

MONITOR DESCRIPTION

The TCM monitors the No. 1 transfer indicator switch to determine when the transfer-case L4 gear is engaged. If the transfer-case L4 gears remain engaged under all of the following conditions, the TCM will conclude that there is a malfunction of the No. 1 transfer indicator switch:
  1. The No. 1 transfer indicator switch indicates that the L4 transfer-case gears are engaged.
  2. Transfer-case shift lever is in the "H" position.
  3. Transfer-case output shaft rpm is between 750 and 3000 rpm.
  4. The specified time period has elapsed.
Then the TCM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). 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.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the 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


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Remove the No. 1 transfer indicator switch (HILUX_TGN26 RM00000479C00JX.html).

  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 (HILUX_TGN26 RM00000479C00JX.html)
OK


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

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

  1. Disconnect the G40 TCM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C29-1 - G40-15 (L4)
    		Always
    		Below 1 Ω
    C29-1 or G40-15 (L4) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM (HILUX_TGN26 RM0000048F3005X.html)