Sakai SV400D-2, Shop Manual

Page: 187 / 218

9-019
ELECTRICAL SYSTEM TROUBLESHOOTING
2-3-3. Brake does not operate
When the parking brake switch is ON or the foot brake switch is OFF (the brake pedal is depressed).
Reference Fig. : 2-3
Check point Check/Cause Action
1. Foot Brake Switch - When the starter switch is ON, measure the voltage between
the foot brake switch NO terminal inlet LgR wire and chassis
ground.
It is normal that no electricity flows.
- If electricity flows, the foot brake switch is faulty.
Replace the foot
brake switch.
2. Parking Brake
Switch
- When the starter switch is ON, measure the voltage between
the parking brake switch pin 3 inlet BrW wire and chassis
ground.
It is normal that no electricity flows.
- If electricity flows, the parking brake switch is faulty.
Replace the parking
brake switch.
3. Neutral Relay (1) When the starter switch is ON, measure the voltage between
the neutral relay pin 1 inlet BrW wire and chassis ground.
Standard voltage: 12 V or more
(2) When the starter switch is ON, measure the voltage between
the neutral relay pin 3 inlet GW wire and chassis ground.
Standard voltage: 12 V or more
- If above items (1) and (2) are OK and electricity does not flow
through neutral relay pin 5, the neutral relay is faulty.
Replace the neutral
relay.
4. Parking Brake
Solenoid
- Disconnect harness and measure resistance of coil.
Standard resistance: 11.1 Ω
- If the measured resistance is abnormal, the parking brake
solenoid valve is faulty.
Replace the parking
brake solenoid.
5. Harness Connecting
Between Terminals
- Check harness between terminals for continuity.
- No continuity indicates that harness is open or poorly
connected.
Repair or replace the
harness.
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