PACCAR MX (2004 Emissions) Fault Code: P2609 Grid Heater Relay – Current Too Low or Open Circuit on ECU (D420) Pin (C55)
PACCAR MX (2004 Emissions) Fault Code: P2609 Grid Heater Relay – Current Too Low or Open Circuit on ECU (D420) Pin (C55)
SET CONDITIONS:
The PCI ECU (D420) detects an open circuit on pin C55.
DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on.
CORRESPONDING OBD READINESS MONITOR:
None
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:
1. The sensor or actuator signal wiring has an open circuit.
2. A malfunction of the sensor or actuator
ADDITIONAL INFORMATION:
Through pin C55 the PCI ECU determines the status of the grid heater relay
-
DETROIT DDDL 8.14 SP3 – Detroit Diesel Diagnostic Link 8.14 SP3 2021 ( 1PC )
Detroit $73.00Rated 0 out of 5 -
DOWNLOAD NISSAN UD DIESEL PC-CONSULT DIAGNOSTIC 1.1.13 & PC-REPROMASTER 1.2.0
NISSAN UD $100.00Rated 0 out of 5 -
Scania SDP3 2.48.6 Diagnosis & Programming for VCI 3 VCI3 without Dongle
Scania $30.00Rated 0 out of 5 -
Volvo Premium Tech Tool PTT 2.8.130 Diagnostic Software 04.2022 ACPI ( 1 PC )
Trucks software $143.00Rated 0 out of 5 -
2021 VOLVO PREMIUM TECH TOOL PTT V2.8.21 VCADS+DEVELOPER TOOL+APCI 2021/09 ( 1 PC )
Trucks software $85.00Rated 0 out of 5