DTC P17A9: Transfer Shift Motor Control Circuit Low [08/2019 - ]: Procedure

1. Disconnect the G42 4 wheel drive control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to 4 Wheel Drive Control ECU)

   Standard Resistance

   TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR) SIDE
   
   

   Tester Connection	Condition	Specified Condition
   G42-2 (HM1) or G42-6 (HM2) - Body ground	Always	10 kΩ or higher

   TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR) SIDE
   
   

   Tester Connection	Condition	Specified Condition
   G42-8 (TM1) or G42-7 (TM2) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK	A
   NG (transfer shift actuator assembly (high-low transfer shift motor) side)	B
   NG (transfer shift actuator assembly (center differential lock shift motor) side)	C

Result: 

A 

REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2015 - ] 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Disconnect the G42 4 wheel drive control ECU connector.
2. Disconnect the C34 transfer shift actuator assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G42-2 (HM1) or C34-8 (HM1) - Body ground	Always	10 kΩ or higher
   G42-6 (HM2) or C34-7 (HM2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [08/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the G42 4 wheel drive control ECU connector.
2. Disconnect the C34 transfer shift actuator assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G42-8 (TM1) or C34-2 (TM1) - Body ground	Always	10 kΩ or higher
   G42-7 (TM2) or C34-1 (TM2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [08/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR