Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Transfer Shift Motor Control Circuit High (P17AA)

Toyota Tacoma 2015-2018 Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / 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

  • Diagnosis Condition: Directly after or while the ignition switch is turned to ON (transfer shift motor not operating)
  • Malfunction Status: Short to B+ in the transfer shift motor and A.D.D. shift motor drive circuits
  • Malfunction Time: 0.5 seconds or more (after the ignition switch is turned to ON, 0.05 seconds or more)
  • Other: 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Transfer shift actuator assembly
  • A.D.D. actuator (differential vacuum actuator assembly)

WIRING DIAGRAM

Refer to DTC P17A9 (See page PROCEDURE )

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:

Tester Connection

Switch Condition

Specified Condition

F12-8 (TM1) or F12-7 (TM2) - Body ground

Ignition switch ON

Below 1 V

A.D.D. actuator (differential vacuum actuator assembly) side:

Tester Connection

Switch Condition

Specified Condition

F12-2 (DM1) or F12-6 (DM2) - Body ground

Ignition switch ON

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to 4 Wheel Drive Control ECU)

Result

Result

Proceed to

OK

A

NG (transfer shift actuator assembly side)

B

NG (A.D.D. actuator (differential vacuum actuator assembly) side)

C

A

REPLACE 4 WHEEL DRIVE CONTROL ECU

C

GO TO STEP 3

B

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:

Clearance Sonar Main Switch
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE INSTRUMENT PANEL LOWER CENTER FINISH PANEL (See page ) 2. REMOVE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY (a) Disengage the 2 claws to remove the back sonar or clearance sonar switch assembly. ...

GPS Mark is not Displayed
PROCEDURE 1. CHECK CABIN (a) Check the cabin for any object that might interrupt radio reception or additional devices which use radio waves on the instrument panel. If such an object exists, remove it and check if the GPS mark reappears. HINT: The GPS uses ex ...

Clutch Switch Circuit
DESCRIPTION While depressing the clutch pedal, the clutch start switch assembly sends a signal to terminal MTN of the 4 wheel drive control ECU. While the signal is input, switching between H4 and L4 is possible. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHSTREA ...

В© 2011-2020 Copyright www.ttguide.net