Toyota Yaris: Lighting System / Door Unlock Detection Switch Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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PROCEDURE
| 1. | READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Main Body > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| FR Door Lock Position Switch Status | Front door RH unlock detection switch signal | LOCK or UNLOCK | LOCK: Front door RH locked UNLOCK: Front door RH unlocked | - |
| FL Door Lock Position Switch Status | Front door LH unlock detection switch signal | LOCK or UNLOCK | LOCK: Front door LH locked UNLOCK: Front door LH unlocked | - |
| Tester Display |
|---|
| FR Door Lock Position Switch Status |
| FL Door Lock Position Switch Status |
OK:
Normal conditions listed above are displayed.
| Result | Proceed to |
|---|---|
| OK | A |
| NG ("FR Door Lock Position Switch Status" is not normal) | B |
| NG ("FL Door Lock Position Switch Status" is not normal) | C |
| A |
 | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| C |
 | GO TO STEP 4 |
|
| 2. | INSPECT FRONT DOOR LOCK ASSEMBLY LH |
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| NG |
 | REPLACE FRONT DOOR LOCK ASSEMBLY LH |
|
| 3. | CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the H4 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 |
|---|---|---|
| L11-8 (LSSR) - H4-9 (LSFL) | Always | Below 1 Ω |
| L11-8 (LSSR) or H4-9 (LSFL) | Always | 10 kΩ or higher |
| L11-7 (E) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 4. | INSPECT FRONT DOOR LOCK ASSEMBLY RH |
Click here
| NG |
 | REPLACE FRONT DOOR LOCK ASSEMBLY RH |
|
| 5. | CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the H4 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 |
|---|---|---|
| K11-7 (LSSR) - H4-3 (LSFR) | Always | Below 1 Ω |
| K11-7 (LSSR) or H4-3 (LSFR) - Body ground | Always | 10 kΩ or higher |
| K11-8 (E) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure...
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Fuel-Filler Lid and Cap
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.
