DTC B1830: Left Mirror Position Sensor Malfunction

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

Clear the DTC with the HDS
Turn the ignition switch to LOCK (0), and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode
Operate the left power mirror in each direction with the power mirror switch
Check for DTCs with the HDS
Is DTC B1830 indicated?

YES -Go to step 5

NO -Intermittent failure, the system is OK at this time
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION )
Disconnect the power mirror control unit 24P connector
Disconnect the left power mirror 16P connectors
Check for continuity between body ground and left power mirror connector (16P) terminal No 6

Fig 1: Checking Continuity Between Body Ground And Left Power Mirror Connector (16P) Terminal 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to ground in the wire

NO -Go to step 10
Connect power mirror control unit connector (24P) terminal No 7 to body ground with a jumper wire

Fig 2: Connecting Power Mirror Control Unit Connector (24P) Terminal 7 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between body ground and left power mirror connector (16P) terminal No 6

Fig 3: Checking Continuity Between Body Ground And Left Power Mirror Connector (16P) Terminal 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 12

NO -Repair open in the wire
Check for continuity between body ground and left power mirror connector (16P) terminals No 8 and No 13

Fig 4: Checking Continuity Between Body Ground And Left Power Mirror Connector (16P) Terminals 8 And 13
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to ground in the wire

NO -Go to step 13
Connect power mirror control unit connector (24P) terminals No 4 and No 5 to body ground with a jumper wire

Fig 5: Connecting Power Mirror Control Unit Connector (24P) Terminals 4 And 5 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between body ground and left power mirror connector (16P) terminals No 8 and No 13

Fig 6: Checking Continuity Between Body Ground And Left Power Mirror Connector (16P) Terminals 8 And 13
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 15

NO -Repair open in the wire
Check for continuity between body ground and power mirror control unit connector (24P) terminal No 6

Fig 7: Checking Continuity Between Body Ground And Power Mirror Control Unit Connector (24P) Terminal 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to ground in the wire

NO -Go to step 16
Connect power mirror control unit connector (24P) terminal No 6 to body ground with a jumper wire

Fig 8: Connecting Power Mirror Control Unit Connector (24P) Terminal 6 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between body ground and left power mirror connector (16P) terminal No 7

Fig 9: Checking Continuity Between Body Ground And Left Power Mirror Connector (16P) Terminal 7
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 18

NO -Repair open in the wire
Reconnect the power mirror control unit connector (24P)
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
Measure the voltage between power mirror control unit connector (24P) terminals No 6 and No 7

Fig 10: Measuring Voltage Between Power Mirror Control Unit Connector (24P) Terminals 6 And 7
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES -Faulty left power mirror position sensor, replace the power mirror actuator (see POWER MIRROR ACTUATOR REPLACEMENT )

NO -Substitute a known-good power mirror control unit, and recheck If DTC is gone, the original power mirror control unit is faulty, replace it (see POWER MIRROR CONTROL UNIT INPUT TEST/REPLACEMENT )