Toyota Tundra (2015 year). Manual — part 874
OK
OK
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
If only past DTCs are output, battery depletion may have occurred in the past.
PROCEDURE
1.
INSPECT BATTERY
(a) Inspect the battery (3UR-FE:
, 3UR-FBE:
, 1UR-FE:
).
NG
REPLACE BATTERY
2.
CHECK BATTERY TERMINAL
(a) Check the battery terminals (3UR-FE:
, 3UR-FBE:
, 1UR-FE:
).
NG
REPAIR BATTERY TERMINAL OR REPLACE
BATTERY
3.
CHECK HARNESS AND CONNECTOR (B TERMINAL)
(a) Disconnect the 4 wheel drive control ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
OK
OK
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A25-6 (B) - Body ground
Always
11 to 14 V
Text in Illustration
*a
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
CHECK HARNESS AND CONNECTOR (GND TERMINAL)
(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
A25-5 (GND) - Body ground
Always
Below 1 Ω
Text in Illustration
*a
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
5.
RECONFIRM DTC
(a) Clear the DTCs
.
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
(b) Operate the transfer position switch.
(c) Check if the same DTC is output
.
Result
RESULT
PROCEED TO
DTC is output
A
DTC is not output
B
B
CHECK INTERMITTENT PROBLEMS
A
REPLACE 4 WHEEL DRIVE CONTROL ECU
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000005KPQ001X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM: P17A0,P17A1; Automatic Disconnecting
Differential Motor Control Circuit Open; 2015 MY Tundra [08/2014 - ]
DTC
P17A0
Automatic Disconnecting Differential Motor Control Circuit Open
DTC
P17A1
Automatic Disconnecting Differential Motor Control Circuit Low
DESCRIPTION
This DTC is detected when an open circuit or short to ground in the A.D.D. shift motor drive circuit is detected.
DTC
CODE
DTC DETECTION CONDITION
DIAGNOSIS CONDITION
1.
MALFUNCTION STATUS
2.
MALFUNCTION TIME
3.
OTHER
4.
TROUBLE AREA
P17A0
Ignition switch ON (when not switching
between 2WD and 4H)
1.
Open circuit in the A.D.D. shift motor
drive circuit
2.
1 second or more
3.
1 trip detection logic
4.
Wire harness and connector
4 wheel drive control ECU
A.D.D. actuator (differential vacuum
actuator assembly)
P17A1
Ignition switch ON (when not switching
between 2WD and 4H)
1.
Short to ground in the A.D.D. shift motor
drive circuit
2.
1 second or more
3.
1 trip detection logic
4.
Wire harness and connector
4 wheel drive control ECU
A.D.D. actuator (differential vacuum
actuator assembly)
WIRING DIAGRAM
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
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