Toyota Tundra (2015 year). Manual — part 1006
*a
NG
REPLACE 4 WHEEL DRIVE CONTROL ECU
OK
REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000005KPX001X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM: P2772; Four Wheel Drive (4WD) Low
Switch Circuit Range / Performance; 2015 MY Tundra [08/2014 - ]
DTC
P2772
Four Wheel Drive (4WD) Low Switch Circuit Range / Performance
DESCRIPTION
TERMINAL
IN 4H
SWITCHING BETWEEN 4H AND 4L
IN 4L
H4
OFF (OPEN)
ON (GND)
ON (GND)
L4
OFF (OPEN)
OFF (OPEN)
ON (GND)
This DTC is detected when the 4WD HIGH position and 4WD LOW position judgment signals do not match.
DTC
CODE
DTC DETECTION CONDITION
DIAGNOSIS CONDITION
1.
MALFUNCTION STATUS
2.
MALFUNCTION TIME
3.
OTHER
4.
TROUBLE AREA
P2772
Ignition switch is ON and engine is running
1.
H4 terminal signal is OFF (OPEN) and L4 terminal
signal is ON (GND)
2.
1 second or more
3.
1 trip detection logic
4.
Wire harness and
connector
4 wheel drive control
ECU
Transfer indicator
switch
WIRING DIAGRAM
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
INSPECTION PROCEDURE
PROCEDURE
1.
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER
INDICATOR SWITCH)
(a) Disconnect the A26 4 wheel drive control ECU connector.
(b) Disconnect the D70 transfer indicator switch connector.
(c) Disconnect the A24 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A26-13 (L4) - D70-2 (L4)
Always
Below 1 Ω
A26-12 (H4) - D70-1 (H4)
Always
Below 1 Ω
A26-13 (L4), D70-2 (L4) or A24-21 (L4) - Body ground
Always
10 kΩ or higher
A26-12 (H4) or D70-1 (H4) - Body ground
Always
10 kΩ or higher
A26-13 (L4), D70-2 (L4) or A24-21 (L4) - A26-12 (H4) or D70-1 (H4)
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
OK
2.
CHECK 4 WHEEL DRIVE CONTROL ECU (ECU OUTPUT VOLTAGE)
(a) Disconnect the A24 ECM connector.
(b) Disconnect the transfer indicator switch connector.
(c) Measure the voltage according to the value(s) in the table
below.
Standard Voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
D70-2 (L4) - Body
ground
Ignition switch ON
4 to 6 V
D70-1 (H4) - Body
ground
Ignition switch ON
4 to 6 V
Text in Illustration
*a
NOTICE:
Turning the ignition switch on with the ECM connector
disconnected causes other DTCs to be stored. Clear the DTCs
after performing this inspection.
NG
REPLACE 4 WHEEL DRIVE CONTROL ECU
OK
REPLACE TRANSFER INDICATOR SWITCH
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
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