Check The Ground Circuit Voltage - Hino Motors HINO 155 series Workshop Manual

5

Check the ground circuit voltage

A B
V39
GND
Do the measurements meet the standard value?
Replace the GCU.
Perform "After-inspection work" of INFOR-
MATION section.
ENGINE (J05E)/TROUBLESHOOTING
1. Set the starter key to the "ON" position.
2. Use the electrical tester to measure the voltage between each ter-
minal in the engine ECU (signal check harness) and ground.
V59
3. Measure the voltage between the GCU vehicle side connector
V80
V79
GND terminal and ground.
4. Check the ground circuit potential difference between the engine
ECU and the glow control unit.
Starter key: ON
SHTS021270300641
YES
Measurement Tester
conditions connections
Engine ECU (sig-
nal check har-
ness)
E01 (V39) –
Ground
E02 (V59) –
Ground
E03 (V79) –
Ground
E04 (V80) –
Ground
GCU vehicle side
connector
GND – Ground
Check the ground circuit.
Perform "After-inspection work" of INFOR-
MATION section.
2–701
Standard values
Potential defer-
ence:
400 mV or less
NO