Toyota Tundra (2015 year). Manual — part 1009
A
(a) Disconnect the 4 wheel drive control ECU connector.
(b) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A26-1 (TM1) - A26-2 (TM2)
Always
1 Ω or higher
Text in Illustration
*a
Result
RESULT
PROCEED TO
OK
A
NG (when 4HI indicator light is blinking*)
B
NG (when 4LO indicator light is blinking*)
C
B
GO TO STEP 5
C
REPLACE 4 WHEEL DRIVE CONTROL ECU
4.
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER SHIFT
ACTUATOR ASSEMBLY)
(a) Disconnect the A26 4 wheel drive control ECU connector.
(b) Disconnect the D67 transfer shift actuator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A26-1 (TM1) or D67-1 (TM1) - A26-2 (TM2) or D67-2 (TM2)
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
OK
OK
REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY
5.
CHECK DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY (A.D.D. SHIFT MOTOR)
(a) Disconnect the 4 wheel drive control ECU connector.
(b) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A25-1 (DM1) - A25-2 (DM2)
Always
0.5 Ω or higher
Text in Illustration
*a
NG
REPLACE 4 WHEEL DRIVE CONTROL ECU
6.
CHECK HARNESS AND CONNECTOR ( 4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL
VACUUM ACTUATOR ASSEMBLY)
(a) Disconnect the A25 4 wheel drive control ECU connector.
(b) Disconnect the G1 A.D.D. actuator (differential vacuum actuator assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A25-1 (DM1) or G1-1 (DM1) - A25-2 (DM2) or G1-2 (DM2)
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE DIFFERENTIAL VACUUM ACTUATOR
ASSEMBLY
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
A
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000005LEL001X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM: 4WD Control Switch Circuit; 2015 MY
Tundra [08/2014 - ]
4WD Control Switch Circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1.
CONFIRM PROBLEM SYMPTOM
(a) Confirm the problem symptoms.
Result
RESULT
PROCEED TO
The 4HI and 4LO indicator lights are not illuminated
A
The 4HI indicator light is illuminated and the 4LO indicator light is not illuminated
B
The 4HI indicator light is not illuminated and the 4LO indicator light is illuminated
C
B
GO TO STEP 5
C
GO TO STEP 6
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
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