Check For +B/Gnd Short-Circuit In Can H-Line - Hino Motors HINO 155 series Workshop Manual

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Check for +B/GND short-circuit in CAN H-line

+B2 GND4 GND1
LEP LEW LET
+24V CAN- TC
K9G KS4 KS2
+B3 GND5 GND2
ISOK CAN+ SGND
LEQ LEX LEU
K9E KS3 K9H
+B4 +B1 GND3
LER LEN LEV
CAH1
LF5
CAL1
LF6
TE1B
LF2
TE1A CAH0
LF1 LEY
TE2B CAL0
LF4 LEZ
TE2A
LF3
ISGW
LES
Do the measurements meet the standard value?
Go to step 3.
ENGINE (J05E)/TROUBLESHOOTING
1. Set the starter key to the "LOCK" position.
DSW
2. Disconnect the following sensors and controllers connected to the
KPZ
Engine peripherals and after-treatment CAN line.
CGFR +
L30 KE4
• DCU(53P)
• EGR controller, VNT controller
• NOx sensors 1 and 2, DEF sensor
• CAN-TMN2 (terminating resistance)
3. Use the electrical tester to check the continuity between the follow-
ing terminals.
(1) Between the CAH0 terminal in the DCU (53P) vehicle side
(2) Between the CAH0 terminal in the DCU (53P) vehicle side
SHTS021270300028
Starter key: LOCK
YES
connector and the 16th terminal in the DLC (16P).
connector and the 4th terminal in the DLC (16P).
Measurement Tester
conditions connections
DCU vehicle-side
connector –
Diagnostic con-
nector
CAH0 – 16th
CAH0 – 4th
Refer to "DISCONNECTION INSPECTION
FOR ENGINE CAN_H COMMUNICATION L
LINE (250 k)" and check the CAN bus line.
2–49
Standard values
No Continuity
NO