Isuzu KB P190. Manual - part 38
1-118 HEATER AND AIR CONDITIONING
YES
• Disconnect the A/C switch.
• Is there battery voltage between the chassis side
harness connector terminal No. 6 (B-57) and ground?
Open circuit between the engine room
harness connector terminal No. 2 (C-24)
and the engine room harness connector
terminal No. 2 (C-55).
NO
YES
• Is there battery voltage between the engine room
harness connector terminal No. 3 (C-55) and ground?
Open circuit between the No. EB-13 fuse
and the engine room harness connector
terminal No. 3 (C-55).
NO
YES
• Is there continuity between the engine room harness
connector terminal No. 1 (C-55) and ground (C-109)?
Open circuit between the engine room
harness connector No. 1 (C-55) and ground
(C-109).
NO
YES
• Is the electronic themostat OK?
Open circuit between the No. EB-13 fuse
and the chassis side harness connector
No. 6 (B-57).
NO
YES
• Defective ECM
Replace electronic thermostat
NO