DTC P17A8: Transfer Shift Motor Control Circuit Open [08/2015 - ]: Procedure

1. Disconnect the A28 4 wheel drive control ECU connector.
2. Disconnect the C44 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
   A28-2 (HM1) - C44-1 (HM1)	Always	Below 1 Ω
   A28-6 (HM2) - C44-2 (HM2)	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the C44 transfer shift actuator assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (HM1) - 2 (HM2)	Always	1.5 to 100 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Transfer Shift Actuator Assembly)
   *b	High-low Transfer Actuator Side

Result: 

OK 

REPLACE 4 WHEEL DRIVE CONTROL ECU 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY 

(Refer to DISASSEMBLY [08/2015 - ] )