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

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Inspect the ground circuit voltage

A
V39
GND
Do the measurements meet the standard value?
Replace the GCU.
Perform "After-inspection work" of INFOR-
MATION section.
ENGINE (J05E)/TROUBLESHOOTING
1.
B
2.
V59
3.
V80
V79
4.
SHTS021270300612
YES
Set the starter key to the "ON" position.
Use the electrical tester to measure the voltage between each ter-
minal in the engine ECU (signal check harness) and ground.
Measure the voltage between the GND terminal in the glow control
unit vehicle side connector and ground.
Check the difference in potential between the engine ECU and the
ground circuit of the glow control unit.
Measurement
conditions connections
Engine ECU (sig-
nal check har-
ness)
E01(V39) – Ground
E02(V59) – Ground
Starter key: ON
E03(V79) – Ground
E04(V80) – Ground
GCU vehicle side
connector
GND – Ground
Inspect the ground circuit.
Perform "After-inspection work" of INFOR-
MATION section.
Tester
Standard values
Potential differ-
ence:
within 400 mV
NO