Fuse box
2-13
Relays cannot be turned off (stuck ON)
The cause may include: deposition at relay connections,
short circuit in wire harnesses, incorrect re-
quests or determination of the engine ECM.
1. Main relay
7. High-pressure
fuel pump
8. Fuse box
4. Battery
6. Starter motor
3. High-pressure
fuel pump relay
5. Engine
ECM
B
C
D
2. Starter relay
P
M
A
1. Main relay
2. Starter relay
3. High-pressure fuel pump relay
4. Battery
5. Engine ECM
6. Starter motor
7. High-pressure fuel pump
8. Fuse box
A. To sensors and actuators
B. Circuit used for power supply voltage
detection
C. Power supply circuit when relay is ON
D. Relay activation request (excitation) cir-
cuit
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