Toyota Yaris: Stop And Start System / Engine Hood Courtesy Switch Circuit
DESCRIPTION
The engine stop and start ECU detects whether the engine hood is open or closed based on a signal received from the engine hood courtesy switch built into the hood lock assembly.
- The engine stop and start ECU prohibits starting of the engine by stop and start control and changes the mode to "stalled" if the engine hood is open with the clutch pedal is released while the engine is stopped by stop and start control.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
For wire harness and connector inspection procedures and precautions, refer to
PROCEDURE
| 1. | READ VALUE USING GTS (HOOD COURTESY SWITCH) |
NOTICE:
Before performing this step, check that the engine hood can be opened by pulling the hood lock control cable.
Powertrain > Stop and Start > Data List| Tester Display |
|---|
| Hood Courtesy Switch |
(a) According to the display on the GTS, read the Data List.
OK:
| GTS Display | Condition | Normal Condition |
|---|---|---|
| Hood Courtesy Switch | Engine hood closed | ON |
| Engine hood open | OFF |
| OK |
 | CHECK AND ADJUST HOOD LOCK ASSEMBLY FITTING (ADJUST HOOD) |
|
| 2. | INSPECT ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) |
(a) Inspect the engine hood courtesy switch (hood lock assembly).
Click here
| NG |
 | REPLACE ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) |
|
| 3. | CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - BODY GROUND) |
(a) Disconnect the A58 engine hood courtesy switch (hood lock assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A58-2 (E) - Body ground | Always | Below 1 Ω |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)) |
(a) Disconnect the A67 engine stop and start ECU connector.
(b) Disconnect the A58 engine hood courtesy switch (hood lock assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A67-7 (BNT1) - A58-1 (+) | Always | Below 1 Ω |
| A67-7 (BNT1) - Body ground | Always | 10 kΩ or higher |
| A58-1 (+) - Body ground | Always | 10 kΩ or higher |
| OK |
 | CHECK AND ADJUST HOOD LOCK ASSEMBLY FITTING (ADJUST HOOD) |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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CAUTION / NOTICE / HINT
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Break-In Period
No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.
Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.