Wiper Motor Power Source Circuit [09/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Wiper / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Wiper > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Status of Power Supply Voltage	Front wiper motor and link assembly input voltage	Normal or Abnormal	Normal: 6.6 to 17.9 V Abnormal: Below 6.5 V or 18.0 V Higher	-

   Body Electrical > Wiper > Data List 

   Tester Display
   Status of Power Supply Voltage

   OK

   The Techstream display is normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2015 - ] 

Result: 

NG 

See step  2

1. Disconnect the i1 front wiper motor and link assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   i1-4 (+S) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  9

Result: 

OK 

See step  3

1. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   i1-3 (L) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT WIPER MOTOR AND LINK ASSEMBLY. Refer to  REMOVAL [09/2015 - ] 

Result: 

NG 

See step  4

1. Remove the wiper motor wire.

   Refer to REMOVAL [09/2015 - ]

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   i1-3 (L) - iA1-2	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Front Wiper Motor and Link Assembly)
   *b	Front view of wire harness connector (to Wire Harness)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WIPER MOTOR WIRE. Refer to  REMOVAL [09/2015 - ] 

Result: 

OK 

See step  5

1. Remove the WIPER relay.
2. Inspect the WIPER relay.

   Refer to ON-VEHICLE INSPECTION [09/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WIPER RELAY 

Result: 

OK 

See step  6

1. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   5 - Body ground	Always	11 to 14 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to WIPER relay)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - i1-3 (L)	Always	Below 1 Ω
   3 or i1-3 (L) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

1. Disconnect the J8 main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - J8-9 (PWS)	Always	Below 1 Ω
   1 or J8-9 (PWS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the wiper motor wire.

   Refer to REMOVAL [09/2015 - ]

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   i1-4 (+S) - iA1-3	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Front Wiper Motor and Link Assembly)
   *b	Front view of wire harness connector (to Wire Harness)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

NG 

REPLACE WIPER MOTOR WIRE. Refer to  REMOVAL [09/2015 - ]