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:
Tire Position Not Identified
DESCRIPTION
The tire pressure warning ECU and receiver identifies the tire position for each
tire pressure warning valve and transmitter according to the wheel speed signals
from the skid control ECU and acceleration rate signal from each acceleration sensor
built into each tire pressure warn ...
Precaution
PRECAUTION
1. HANDLING PRECAUTIONS FOR STEERING SYSTEM
(a) Care must be taken when replacing parts. Incorrect replacement could affect
the performance of the steering system and result in driving hazards.
2. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM
(a) The vehicle is equipped with SRS (Suppl ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK FOR DTC
HINT:
When using the Techstream with the engine switch off to troubleshoot:
Connect the Techstream to the DLC3 and turn a courtesy light switch on and off
at 1.5-second intervals until communication between the Techstream and vehicle begins.
(a) Connect the ...
