DESCRIPTION This circuit is the power source circuit for the windshield wiper motor assembly. WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses of circuits related to this system before performing the following procedure.
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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PROCEDURE |
1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Wiper / Data List.
(e) 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 | |
Motor Power Supply Voltage |
Front wiper motor assembly supply voltage status |
Min.: 0 V Max.: 63 V |
Almost the same as actual front wiper motor assembly voltage |
- | Body Electrical > Wiper > Data List
|
Tester Display | | Motor Power Supply Voltage |
OK: The Techstream display is normal.
| OK |
 | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
NG |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - BODY GROUND) |
(a) Disconnect the A26 windshield wiper motor assembly connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
A26-1 (GND) - Body ground |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 3. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER MOTOR ASSEMBLY) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
A26-4 (+B) - Body ground |
Engine switch on (IG) |
11 to 14 V | |
Less than approximately 60 seconds after engine switch turned off | |
Approximately 60 seconds or more after engine switch turned off |
Below 1 V |
| OK |
| REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY |
|
NG | |
| |
(a) Inspect the WIPER relay.
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| NG |
| REPLACE WIPER RELAY |
|
OK | |
| |
| 5. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - WIPER RELAY) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
3 (WIPER relay) - Body ground |
Always | 11 to 14 V |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 6. |
CHECK HARNESS AND CONNECTOR (WIPER RELAY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
2 (WIPER relay) - Body ground |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 7. |
CHECK HARNESS AND CONNECTOR (WIPER RELAY - WINDSHIELD WIPER MOTOR ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
5 (WIPER relay) - A26-4 (+B) |
Always | Below 1 Ω | |
5 (WIPER relay) or A26-4 (+B) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 8. |
CHECK HARNESS AND CONNECTOR (WIPER RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
1 (WIPER relay) - G33-21 (WPS) |
Always | Below 1 Ω | |
1 (WIPER relay) or G33-21 (WPS) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
