B1912
B1912Component Location:
General Description
ADM is a node of CAN communication system which consists of IPM. FAM, RAM, DDM, IMS. Main function of ADM is lock/unlock of door and window, adjusting position and fold/unfold of outside mirror. Outside mirror module consists of motor and position sensor. According to Outside mirror Switch signal, Outside mirror motor adjusts position of mirror and position sensor delivers result to ADM by voltage value
DTC Description
The ECM sets DTC B1912 if signal voltage of right outside mirror sensor is out of range
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 B1912 present?
YES - Go to "Inspection & Repair" procedure
NO - 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 - Repair as necessary and go to "Verification Vehicle Repair" procedure
NO - Go to "W/Harness Inspection" procedure
Signal Circuit Inspection
Check for Short in Harness
1. Ignition "OFF"
2. Disconnect right outside mirror.
3. Measure resistance between terminal "12" of ADM and chassis ground
Specification : Approx. Infinity ohms
4. Is the measured resistance within specifications?
YES - Go to "Power circuit Inspection" procedure.
NO - Check for short in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Power Supply Circuit Inspection
Motor Power Circuit Inspection
1. Ignition "OFF"
2. Disconnect right outside mirror.
3. Measure resistance between terminal "9" of ADM and chassis ground
4. Measure resistance between terminal "11" of ADM and chassis ground
Specification : Approx. Infinity ohms
5. Is the measured resistance within specifications?
YES - Go to "Sensor Power circuit Inspection" procedure.
NO - Check for short in power harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Sensor Power Circuit Inspection
6. Ignition "ON" & Engine "OFF"
7. Disconnect right outside mirror.
8. Measure voltage between terminal "16" of ADM and chassis ground
Specification : Approx. 5 V
9. Is the measured voltage within specifications?
YES - Go to "Component Inspection" procedure.
NO - Check for open or short in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Component Inspection
Check Right Outside Mirror Motor
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF"
3. Select 'ACTUATION TEST' mode on scantool and press [F1] to start
4. Does right outside mirror motor work properly?
YES - Go to "Check right outside mirror sensor" procedure.
NO - Substitute with a known-good right outside mirror and check for proper operation. If the problem is corrected, replace right outside mirror and then go to "Verification of Vehicle Repair" procedure.
Check right outside mirror sensor
5. Connect scantool to Data Link Connector (DLC).
6. Ignition "ON" & engine "OFF"
7. Measure voltage value between terminal "12" of outside mirror and chassis ground. While operating outside mirror switch
Specification : left end -> approx. 3.88 V, right end -> approx. 1.0 V
8. Is the measured voltage within specifications?
YES - Go to "Check ADM" procedure.
NO - Substitute with a known-good right outside mirror and check for proper operation. If the problem is corrected, replace right outside mirror and then go to "Verification of Vehicle Repair" procedure.
Check ADM
9. Connect scantool to Data Link Connector (DLC).
10. Ignition "ON" & engine "OFF"
11. Measure voltage value between terminal "9,11" of outside mirror and chassis ground. While operating outside mirror switch
Specification : 9 - 16 V
12. Is the measured voltage within specifications?
YES - 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.
NO - Substitute with a known-good ADM and check for proper operation.
If the problem is corrected, replace ADM and then 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.
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 - Go to the applicable troubleshooting procedure
NO - System is performing to specification at this time.