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:
|
|
.png)
|
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:
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) To check DTCs, connect the Techstream to the Data Link Connector 3 (DLC3)
of the vehicle. The Techstream displays DTCs and freeze frame data. The DTCs and
freeze frame data can be cleared with the Techstream (See page
).
2. NORMAL MODE AND CHECK MODE
(a) ...
Rear Axle Hub Bolt
Installation
INSTALLATION
PROCEDURE
1. INSTALL REAR AXLE HUB BOLT
(a) Install a new hub bolt through the axle hub.
(b) Install the washer plate, as shown in the illustration, through the hub bolt,
and install the hub bolt by tightening the hub nut.
2. APPLY HIGH TEMPERATURE GREASE
3. ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT DRIVER SEAT BELT WARNING LIGHT
HINT:
The seat belt warning light on the combination meter assembly is used for both
the driver seat and front passenger seat.
(a) Turn the ignition switch to ON.
(b) When the driver seat belt is not fastened, check th ...
