Pre-Crash Safety System Power Source Circuit
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
- HINT:
- 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
|
ResultResult
| Proceed to
|
OK
(for LHD)
| A
|
OK
(for RHD)
| B
|
NG
| C
|
| |
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
