P0501: Vehicle Speed Sensor - High - Hino Motors HINO 155 series Workshop Manual

P0501: Vehicle speed sensor - high

INFORMATION
Engine ECU
1. Technical description
• The Engine ECU consistently measures pulses from the vehicle speed sensor.
<Description of malfunction>
• Pulses from the vehicle speed sensor are improper.
2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• Engine speed is 0 r/min or more.
• The fuel injection quantity is 0 mm
• Battery voltage is in the range of 10 V to 16 V.
(2) Judgement criteria
• Vehicle speed pulse frequency remains at 256 Hz or higher (112 miles/h) for 5 seconds or longer.
3. Reset condition
• After restoration to normal condition
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: ON
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• –
<Symptoms on the vehicle due to malfunction>
• –
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
7. After-inspection work
• Clear all past DTCs.
• Check that no DTC is stored after test drive.
8. Estimated failure factors
• Abnormal resistance of sensor
• Malfunction of pulse modulator
• Harness disconnection or short-circuit
• Irregular contact (disconnection or poor fit of connector)
• Noise
ENGINE (J05E)/TROUBLESHOOTING
0.1A
U27
(SP1)
Vehicle speed signal
3
/st. cyl or less.
Combination meter
EJE
(SP02)
2–565
SHTS021270300516