Toyota Tacoma (2015-2018) Service Manual: Transfer Shift Motor Control Circuit High (P17AA)
DESCRIPTION
This DTC is output when a short to B+ in the transfer shift motor and A.D.D. shift motor drive circuit is detected.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
P17AA |
Transfer Shift Motor Control Circuit High |
|
|
WIRING DIAGRAM
Refer to DTC P17A9 (See page .gif)
)
PROCEDURE
|
1. |
CHECK ACTUATOR ASSEMBLY (TRANSFER SHIFT MOTOR AND A.D.D. SHIFT MOTOR) |
(a) Disconnect the 4 wheel drive control ECU connector.
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: Transfer shift actuator assembly side:
|
|
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|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (transfer shift actuator assembly side) |
B |
|
NG (A.D.D. actuator (differential vacuum actuator assembly) side) |
C |
| A | .gif) |
REPLACE 4 WHEEL DRIVE CONTROL ECU |
| C | |
GO TO STEP 3 |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND TRANSFER SHIFT ACTUATOR ASSEMBLY - BODY GROUND) |
(a) Disconnect the F12 4 wheel drive control ECU connector.
(b) Disconnect the T4 transfer shift actuator assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F12-8 (TM1) or T4-2 (TM1) - Body ground |
Ignition switch ON |
Below 1 V |
|
F12-7 (TM2) or T4-1 (TM2) - Body ground |
Ignition switch ON |
Below 1 V |
| OK | |
REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY - BODY GROUND) |
(a) Disconnect the F12 4 wheel drive control ECU connector.
(b) Disconnect the A3 A.D.D. actuator (differential vacuum actuator assembly) connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F12-2 (DM1) or A3-1 (DM1) - Body ground |
Ignition switch ON |
Below 1 V |
|
F12-6 (DM2) or A3-2 (DM2) - Body ground |
Ignition switch ON |
Below 1 V |
| OK | |
REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Transfer Shift Motor Control Circuit Low (P17A9)
DESCRIPTION
This DTC is output when a short to ground in the transfer shift motor and A.D.D.
shift motor drive circuit is detected.
DTC No.
Detection Item
DTC Dete ...
Transfer Shift Motor Limit Switch Circuit (P17AC)
DESCRIPTION
When the transfer switches modes, the TL1, TL2 and TL3 terminals of the limit
switch are in one of the ON/OFF combinations listed in the table below.
Terminal
Whe ...
Other materials:
Washer Motor
Components
COMPONENTS
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
HINT:
This check should be performed with the windshield washer motor and pump assembly
installed to the windshield washer jar assembly.
...
Main Switch Illumination Circuit
DESCRIPTION
When the light control switch is turned to the tail or head position, this circuit
sends an illumination signal to the wireless charger main switch (mobile wireless
charger switch). Based on this signal, the wireless charger main switch (mobile
wireless charger switch) is illumina ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE STEERING GEAR OUTLET RETURN TUBE
(a) Using a union nut wrench, remove the steering gear outlet return tube.
2. REMOVE STEERING TURN PRESSURE TUBE
(a) Using a union nut wrench, remove the 2 pressure tubes.
(b) Remove the 4 O-rings from the pressure tubes.
3. ...
