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General Description

Once IPM receives fog lamp switch working signal, it sends the signal to RAM by CAN communition. RAM turns on fog lamp

DTC Detecting Condition

This code is set when left front fog lamp circuit is shortted to ground for more than 150ms during Rear Fog Lamp operating.

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	● Load Mornitoring	● Poor connection ● Short to ground in Rear Fog Lamp circuit ● Faulty Rear Fog Lamp. ● Faulty RAM
Enable Conditions	● IG KEY ON.
Threshold Value	● It is abnormal if output voltage is 0V.
Diagnostic Time	● Immediately
DTC Erasing Time	● DTC is erased immediately after trouble fixed.

Diagnostic Circuit Diagram

Scantool Data Analysis

Connect GDS.

IG "ON" and engine "OFF".

Select "DTC Analysis" mode.

After erase DTC, keep the vehicle condition within "the enable conditions" (Refer to "DTC Detecting Condition" table).

Is the same DTC occurred again?

	▶ Go to next procedure.
	▶ Fault is intermittent caused by poor contact in the sensor's and/or RAM's connector or was repaired and RAM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

■ Check Rear Fog Lamp

IG "OFF" and connect scantool

IG "ON" & ENG "OFF"

Select "Actuation Test" mode.

Execute "Rear Fog Lamp" test.

10.

Is Rear Fog Lamp working normal ?

	▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to next procedure.

Terminal and Connector Inspection

Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Rear Fog Lamp Circuit Inspection" procedure.

Rear Fog Lamp Circuit Inspection

■ Check short to ground in harness

IG "OFF", disconnect battery (-) terminal.

Disconnect RAM, Rear Fog Lamp connector.

Measure resistance between the Rear Fog Lamp terminal of RAM harness connector and chassis ground.

Specification: infinity

Is the measured resistance within specification?

▶ Substitute with a known - good RAM and check for proper operation.

If the problem is corrected, replace the RAM and go to "Verification of Vehicle Repair" procedure.

▶ Repair short to ground in circuit of Left Fog Lamp, and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

Connect scan tool and select "DTC Analysis" mode.

Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.

Is any DTC outputted again?

	▶ Go to the applicable troubleshooting procedure.
	▶ System performing to specification at this time.