Description
The front fog lamps do not turn on in any setting.
Diagnosis procedure
1.Combination switch (lighting and turn signal switch) inspection
Check the combination switch (lighting and turn signal switch). Refer to bcs-72, "symptom table" (with intelligent key system) or bcs-125, "symptom table" (without intelligent key system).
Is the inspection result normal? Yes >> go to 2.
No >> repair or replace the malfunctioning part.
2.Check front fog lamp request signal input
Consult data monitor

Is the inspection result normal? Yes >> go to 3.
No >> replace bcm. Refer to bcs-73, "removal and installation" (with intelligent key system) or bcs- 126, "removal and installation" (without intelligent key system).
3.Front fog lamp circuit inspection
Check the front fog lamp circuit. Refer to EXL-94, "Diagnosis Procedure".
Is the inspection result normal? YES >> Replace IPDM E/R. Refer to PCS-30, "Removal and Installation" (with Intelligent Key system) or PCS-58, "Removal and Installation" (without Intelligent Key system).
NO >> Repair or replace the malfunctioning part.
Parking, license plate and tail
lamps are not turned onCan communication circuit
Diagnosis procedure
1.CONNECTOR INSPECTION
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Disconnect all the unit connectors on CAN communication system.
Check terminals and connectors for damage, bend and loose connection.
Is the inspection resu ...
Precaution for work
When removing or disassembling each component, be careful not to damage
or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
When removing (disengaging) components with a screwdriver or similar
tool, be sure to wrap the component
with a ...
P0603 ECM
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0603
ECM BACK UP CIRCUIT
[Internal control module keep
alive memory (KAM) error]
Malfunction in the internal back up RAM o ...