Toyota Tacoma (2015-2018) Service Manual: 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 Detection Condition |
Trouble Area |
|---|---|---|---|
|
P17A9 |
Transfer Shift Motor Control Circuit Low |
|
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK ACTUATOR ASSEMBLY (TRANSFER SHIFT MOTOR OR 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: Transfer shift actuator assembly side:
|
|
|
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 |
|
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|
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 resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F12-8 (TM1) or T4-2 (TM1) - Body ground |
Always |
10 kΩ or higher |
|
F12-7 (TM2) or T4-1 (TM2) - Body ground |
Always |
10 kΩ or higher |
| 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 resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F12-2 (DM1) or A3-1 (DM1) - Body ground |
Always |
10 kΩ or higher |
|
F12-6 (DM2) or A3-2 (DM2) - Body ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Four Wheel Drive (4WD) Range Signal Circuit Range / Performance (P279E)
DESCRIPTION
When the transfer position switch is switched, the 2-4 terminal and LO terminal
change to one of the following ON/OFF combinations listed in the table below.
Terminal
...
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 Detectio ...
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DESCRIPTION
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DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
C1A0 ...
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DESCRIPTION
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DESCRIPTION
In some cases, wireless door lock control functions are normal but the hazard
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outputs from the main body ECU (multiplex ...
