B2524

B2524

Component Location:

General Description
RAM is a component of BCM that consists of DDM, ADM, IPM, FAM, IMS and cluster module. Each part of BCM is connected to one another through CAN communication line for efficient communication. Those modules control front/rear, driver/passenger seat, cluster with electrical signal and they share information with other modules. RAM (Rear Area Module) set up at rear-left of passenger room controls various rear lamps (tail lamp, rear turn signal lamp, backup lamp, stop lamp, cabin lamp), window (sliding door power window, quarter glass, rear defogger), rear wiper and oil cap door. The power of stop lamp is supplied from the power line through FAM stop lamp RAM lamp in sequence. Controlling stop lamp is performed at FAM and RAM. FAM transfers power from "HOT AT ALL TIMES power circuit" to stop lamp switch and via RAM, this power is supplied to stop lamp. Furthermore, RAM senses stop lamp circuit error as well.

DTC Description
B2524 is set when open in RAM or stop lamp circuit is detected.

DTC Detecting Condition:

Schematic Diagram:

Monitor Scantool Data
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF"
3. Select "Diagnostic Trouble Codes (DTCs)" mode and monitor "DTC Status" parameter
4. Is the DTC B2524 present?

YES
a. Go to "Inspection & Repair" procedure

NO
a. Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM 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.

Terminal and Connector Inspection
1. Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damage of component.
2. Check poor connection, beding, corrosion, contamination, deformation of connector and it terminals.
3. Is any problem found?

YES
a. Repair if necessary and go to "Verification of Vehicle Repair".

NO
a. Go to "Component Inspection".

Power Supply Circuit Inspection

Check open in power circuit
1. Ignition "ON" & engine "OFF"
2. Measure the resistance between stop lamp power circuit connector terminal at RAM side (BEC-RF1-33, 43, BEC-RR-14) and stop lamp (F18, F19-2, R03-1).

Specification : 0 ohms






3. Is the measured resistance within the specification?

YES
a. Go to "Ground Circuit Inspection".

NO
a. Repair open in power circuit and Go to "Verification of Vehicle Repair".

Ground Circuit inspection

Check open in ground circuit
1. Ignition "ON" & engine "OFF"
2. Measure the resistance between stop lamp ground circuit (F19, F18-6, R03-2) and chassis ground.

Specification : 0 ohms






3. Is the measured resistance within the specification?

YES
a. Go to "Component Inspection".

NO
a. Repair open in ground circuit and go to "Verification of Vehicle Repair".

Component Inspection

Check stop lamp (for Left, Right, Upper stop lamps)
1. Ignition "ON" & engine "OFF"
2. Disconnect stop lamp.
3. Measure the resistance between both terminals of stop lamp light bulb.

Specification : approx. 0.04 ohms (If light bulb fails, Infinity ohms is measured.)






4. Is the measured resistance within the specification?

YES
a. Go to "Check RAM".

NO
a. Replacing the light bulb with light bulb for test, if normal operating condition is confirmed, Replace light bulb for test with new light bulb and go to "Verification of Vehicle Repair".

Check RAM
5. Connect scantool to Data Link Connector (DLC).
6. Ignition "ON" & engine "OFF"
7. Check if DTC is erased after replacing RAM with "RAM for test".
8. Is the DTC erased?

YES
a. Replace "RAM for test" with "new RAM" and go to "Verification of Vehicle Repair".

NO
a. Check connecting condition of connector and go to "Verification of Vehicle Repair".

Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC
2. Operate the vehicle within DTC Enable conditions in General information.
3. Are any DTCs present?

YES
a. Go to the applicable troubleshooting procedure

NO
a. System is performing to specification at this time.