DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (ECU-IG No. 1, PSB)
CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - BATTERY AND BODY GROUND)
PRE-CRASH SAFETY SYSTEM - Power Source Circuit
DESCRIPTION
This circuit supplies power to the seat belt control ECU when the ignition switch is ON.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Start the engine before inspection. Check the IG1 NO. 1 relay or battery if the starting system does not start.
| 1.INSPECT FUSE (ECU-IG No. 1, PSB) |
Remove the ECU-IG No. 1 and PSB fuses from the main body ECU.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| ECU-IG No. 1 fuse | Always | Below 1 Ω |
| PSB fuse |
| 2.CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - BATTERY AND BODY GROUND) |
Disconnect the E41 and E42 seat belt control ECU connectors.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| E42-8 (IG1) - Body ground | Ignition switch ON | 11 to 14 V |
| Ignition switch off | Below 1 V |
| E41-7 (+B) - Body ground | Always | 11 to 14 V |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E41-8 (PGND) - Body ground | Always | Below 1 Ω |
Result| Result | Proceed to |
OK
(for LHD) | A |
OK
(for RHD) | B |
| NG | C |
| | REPLACE SEAT BELT CONTROL ECU ()
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| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| A | |
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| REPLACE SEAT BELT CONTROL ECU ()
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