B2598
B2598Component 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. Received multi function switch rear lamp signal from IPM through CAN line, RAM controls Rear blower switch illumination lamp. Besides, RAM controls power sliding door switch (RH,LH), quarter glass switch (LH/RH), rear aircon control switch.
DTC Description
B2598 is set when open in rear blower switch illumination 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 B2598 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. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES
a. Repair as necessary and go to "Verification Vehicle Repair" procedure
NO
a. Go to "W/Harness Inspection" procedure
Power Supply Circuit Inspection
Motor open in power circuit
1. Ignition "ON" & engine "OFF"
2. Measure the resistance between Rear blower switch illumination power circuit connector terminal at RAM side (BCM-RR1-13) and Rear blower switch illumination (R42-1).
Specification : 0 ohms
3. Is the measured resistance within specifications?
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 Rear blower switch illumination ground circuit (BCM-RR1-1) and Rear blower switch illumination (R42-7).
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 Rear blower switch illumination
1. Ignition "ON" & engine "OFF"
2. Disconnect Rear blower switch illumination.
3. Measure the resistance between both terminals of Rear blower switch illumination 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" procedure.
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 and monitor the DTC on the scantool
3. Are any DTCs present?
YES
a. Go to the applicable troubleshooting procedure
NO
a. System is performing to specification at this time.