Pre-Crash Safety System Power Source Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)
PRE-CRASH SAFETY SYSTEM - Power Source Circuit |
DESCRIPTION
This circuit supplies power to the seat belt control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed (Click here).
| 1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
Disconnect the negative (-) terminal cable from the battery.
Disconnect the O38 seat belt control ECU connector.
Connect the negative (-) terminal cable to the battery.
Measure the voltage according to the value (s) in the table below.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
O38-3 (IG1) - Body ground
| Engine switch off
| Below 1 V
|
Engine switch on (IG)
| 10 to 14 V
|
O38-9 (+B) - Body ground
| Always
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) |
Disconnect the negative (-) terminal cable from the battery.
Measure the resistance according to the value (s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
O38-18 (PGND) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK |
|
|
|
| REPLACE SEAT BELT CONTROL ECU |
|
