PACCAR MX (2004 Emissions) Fault Code: P0543 Grid Heater – Current Too Low or Open Circuit on ECU (D420) Pin (C72) or Pin (C49)
PACCAR MX (2004 Emissions) Fault Code: P0543 Grid Heater – Current Too Low or Open Circuit on ECU (D420) Pin (C72) or Pin (C49)
SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects a too low current on the control circuit of the grid heater relay (G014).
DIAGNOSTIC CONDITION:
This diagnostic runs continuously after the ignition is switched on.
CORRESPONDING OBD READINESS MONITOR:
None
RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.
REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful
POSSIBLE CAUSES:
Open circuit in the control circuit of the grid heater relay (G014) caused by:
1. Wiring issues between the PCI ECU (D420) and the grid heater relay (G014)
2. Malfunction in the grid heater relay (G014)
-
JOHN DEERE SERVICE ADVISOR 5.3.225 DATABASE AG + CF ENGLISH 2023
John Deere $250.00Rated 0 out of 5 -
PACCAR Electronic Service Analyst 5.4.3.0 SW files 27.03.2021 software trucks
PACCAR $60.00Rated 0 out of 5 -
VOLVO PREMIUM TECH TOOL PTT 2.7.116 + APCI 2021 + devtool ( ONLINE )
Trucks software $80.00Rated 0 out of 5
-
Hino Diagnostic eXplorer 2 – Hino DX2 v1.1.21.4 with keygen unlocked ( Hino trucks )
Hino $60.00Rated 0 out of 5 -
Wabco ToolBox plus 13.7 + ECAS CAN2 v3.00 Diagnostics Software
Trucks software $84.00Rated 0 out of 5 -
10 IN 1 FOR CAT SIS Caterpillar 2021 Full Service Dealer INCLUDING CAT 2019 C
CAT $110.00Rated 0 out of 5
Related products
-
SERVICE MANUAL Eaton Fuller – Autoshift, Autoselect Service Manual (TRSM-0050)
EATON $25.00Rated 0 out of 5 -
SERVICE MANUAL International Engines MaxxForce DT 9 10 (2014 & Newer)
INTERNATIONAL ENGINES $17.00Rated 0 out of 5 -
SERVICE MANUAL International Engines DT466 & DT530 (1999-2000) B
INTERNATIONAL ENGINES $29.00Rated 0 out of 5