Inspect The Engine Ecu Power Supply - Hino Motors HINO 155 series Workshop Manual

4

Inspect the engine ECU power supply

A B
V18
V39
V38
Do the measurements meet the standard value?
Go to step 5.
ENGINE (J05E)/TROUBLESHOOTING
1. Set the starter key to the "LOCK" position.
V58
2. Connect the signal check harness to the engine ECU.
V59
3. Start the engine.
V80
V79
4. Use the electrical tester to measure the voltage between the termi-
V78
nals of the engine ECU (signal check harness).
SHTS021270300560
Engine idling
YES
Measurement Tester
conditions connections
Engine ECU (sig-
nal check har-
ness)
(+) – (-)
+B (V18) – E01
(V39)
+B1 (V38) – E02
(V59)
+B2 (V58) – E03
(V79)
+BM (V78) – E04
(V80)
Check the engine ECU wire harness (power
supply circuit).
Repair or replace parts as needed.
Perform "After-inspection work" of INFOR-
MATION section.
2–611
Standard values
10 – 16 V
NO