Driver Position Memory System (dpms) Acura RL II

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DTC B1802: Power Seat Control Unit Internal (EEPROM) Error

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS. Is DTC B1802 indicated? YES - Replace the power seat control unit. NO - Intermittent failure, the system is OK at this time.

DTC B1805: Power Seat Control Unit Lost Communication with Gauge Control Module (VSP/NE Message); DTC B1808: Power Seat Control Unit Lost Communication with Gauge Control Module (A/T Message)

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 ).

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS. Is DTC B1805 and/or B1808 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the gauge control module.
5. Check for DTCs with the HDS. Are DTCs B1011, B1060, B1205, B1408*, B1805, B1808, B2106, and B2160 also indicated? (*:'05-06 models) YES - Do the gauge control module input test (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ). NO - Replace the power seat control unit.

DTC B1806: Power Seat Control Unit Lost Communication with MICU (MICU Message); DTC B1810: Power Seat Control Unit Lost Communication with MICU (MIRRORSW Message)

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 ).

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS. Is DTC B1806 and/or B1810 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connection between the power seat control unit and the MICU.
5. Check for DTCs with the HDS. Are DTCs B1055, B1157, B1255, B1605, B2107, B2155, and/or B2156 also indicated? YES - Do the MICU input test (see «MICU INPUT TEST»(/acura/rl/ii-2004-2008/remont/communication-devices/#multiplex-integrated-control-system__micu-input-test) ). NO - Do the power seat control unit input test (see «POWER SEAT CONTROL UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__power-seat-control-unit-input-test) ).

DTC B1811: Power Seat Control Unit Lost Communication with Driver's MPCS Unit (DOORSW Message); DTC B1812: Power Seat Control Unit Lost Communication with Driver's MPCS Unit (MEMSW Message)

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 ).

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS. Is DTC B1811 and/or B1812 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the driver's MPCS unit.
5. Check for DTCs with the HDS. Are DTCs B1014, B1064, B1181, B1405*, B1406*, B1613, and/or B1812 also indicated? (* : '05-06 models) YES - Do the driver's MPCS unit input test (see «DRIVER'S MPCS UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/communication-devices/#multiplex-integrated-control-system__drivers-mpcs-unit-input-test) ). NO - Do the power seat control unit input test (see «POWER SEAT CONTROL UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__power-seat-control-unit-input-test) ).

DTC B1825: Power Seat Slide Motor Pulse Error

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 ). DTC B1825 is stored when the slide switch is operated more than 1 second after the seat slides to the most forward or most backward position, even when the system is OK.

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1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the power seat adjustment switch in all directions for more than 1 second each.
4. Check for DTCs with the HDS. Is DTC B1825 indicated? YES - Go to step 5. NO - Intermittent failure, the slide position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Check for DTCs with the HDS. Is DTC B1836 also indicated? YES - Troubleshoot DTC B1836 first (see «DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__dtc-b1836-power-seat-position-sensor) ). NO - Go to step 6.
6. Check for DTCs with the HDS. Are DTCs B1826, B1827, and/or B1828 also indicated? YES - Go to step 18 . NO - Go to step 7.
7. Clear the DTCs with the HDS.
8. Turn the ignition switch OFF, and then back ON (II).
9. Operate the slide switch for 2 seconds, and check the slide motor operation. Does the slide motor run smoothly? YES - Go to step 10. NO - Go to step 25 .
10. Turn the ignition switch OFF.
11. Disconnect power seat control unit connector A (40P).
12. Disconnect the slide position sensor 3P connector.
13. Check for continuity between power seat control unit connector A (40P) terminals No. 11 and No. 29 and slide position sensor 3P connector terminals No. 1 and No. 2 respectively. Is there continuity? YES - Go to step 14. NO - Repair an open in the wire.
14. Check for continuity between power seat control unit connector A (40P) terminal No. 11 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 15.
15. Reconnect power seat control unit connector A (40P).
16. Turn the ignition switch ON (II).
17. Measure the voltage between slide position sensor 3P connector terminals No. 1 and No. 2. Is there about 5 V? YES - Faulty slide position sensor, replace the slide motor assembly.* NO - If there is no voltage, replace the power seat control unit. If there is battery voltage, repair a short in the wire (sensor line).
18. Turn ignition switch OFF.
19. Disconnect power seat control unit connector A (40P).
20. Disconnect the slide position sensor 3P connector.
21. Check for continuity between power seat control unit connector A (40P) terminals No. 15 and No. 29 and slide position sensor 3P connector terminals No. 3 and No. 2 respectively. Is there continuity? YES - Go to step 22. NO - Repair an open in the wire.
22. Reconnect power seat control unit connector A (40P).
23. Turn the ignition switch ON (II).
24. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29. Is there battery voltage when the slide switch is operated? YES - Faulty slide position sensor, replace the slide motor assembly and recheck for DTCs. NO - Replace the power seat control unit.
25. Turn the ignition switch OFF.
26. Disconnect power seat control unit connector B (18P).
27. Disconnect the slide motor 2P connector.
28. Check for continuity between power seat control unit connector B (18P) terminals No. 7 and No. 17 and slide motor 2P connector terminals No. 1 and No. 2 respectively. Is there continuity? YES - Go to step 29. NO - Repair an open in the wire.
29. Check for continuity between body ground and slide motor 2P connector terminals No. 1 and No. 2 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 30.
30. Do the slide motor test (see «SLIDE MOTOR, FRONT UP-DOWN MOTOR, REAR UP-DOWN MOTOR»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power seat control unit. NO - Replace the slide motor.

DTC B1826: Power Seat Front Up-down Motor Pulse Error

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 ). DTC B1826 is stored when the front up-down switch is operated more than 1 second after the seat moves to the most up or most down position, even when the system is OK.

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1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the power seat adjustment switch in each direction for more than 1 second each.
4. Check for the DTCs with the HDS. Is DTC B1826 indicated? YES - Go to step 5. NO - Intermittent failure, the front up-down position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Check for DTCs with the HDS. Is DTC B1836 also indicated? YES - Troubleshoot DTC B1836 first (see «DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__dtc-b1836-power-seat-position-sensor) ). NO - Go to step 6.
6. Check for DTCs with the HDS. Are DTCs B1825, B1827 and/or B1828 also indicated? YES - Go to step 18 . NO - Go to step 7.
7. Clear the DTCs with the HDS.
8. Turn the ignition switch OFF, and then back ON (II).
9. Operate the front up-down switch for 2 seconds, and check the front up-down motor operation. Does the front up-down motor run smoothly? YES - Go to step 10. NO - Go to step 25 .
10. Turn the ignition switch OFF.
11. Disconnect power seat control unit connector A (40P).
12. Disconnect the front up-down motor/position sensor 5P connector.
13. Check for continuity between power seat control unit connector A (40P) terminals No. 12 and No. 29 and front up-down motor/position sensor 5P connector terminals No. 5 and No. 4 respectively. Is there continuity? YES - Go to step 14. NO - Repair an open in the wire.
14. Check for continuity between power seat control unit connector A (40P) terminal No. 12 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 15.
15. Reconnect power seat control unit connector A (40P).
16. Turn the ignition switch ON (II).
17. Measure the voltage between front up-down motor/position sensor 5P connector terminals No. 5 (+) and No. 4(-). Is there about 5 V? YES - Replace the front up-down motor/position sensor. NO - If there is no voltage, replace the power seat control unit. If there is battery voltage, repair a short in the wire (sensor line).
18. Turn the ignition switch OFF.
19. Disconnect power seat control unit connector A (40P).
20. Disconnect the front up-down motor/position sensor 5P connector.
21. Check for continuity between power seat control unit connector A (40P) terminals No. 15 and No. 29 and front up-down motor/position sensor 5P connector terminals No. 3 and No. 4 respectively. Is there continuity? YES - Go to step 22. NO - Repair an open in the wire.
22. Reconnect power seat control unit connector A (40P).
23. Turn the ignition switch ON (II).
24. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29. Is there battery voltage when the front up-down switch is operated? YES - Replace the front up-down motor/position sensor, and recheck for DTCs. NO - Replace the power seat control unit.
25. Turn the ignition switch OFF.
26. Disconnect power seat control unit connector B (18P).
27. Disconnect the front up-down motor/position sensor 5P connector.
28. Check for continuity between power seat control unit connector B (18P) terminals No. 6 and No. 16 and front up-down motor/position sensor 5P connector terminals No. 1 and No. 2 respectively. Is there continuity? YES - Go to step 29. NO - Repair an open in the wire.
29. Check for continuity between front up-down motor/position sensor 5P connector terminals No. 1 and No. 2 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 30.
30. Do the front up-down motor test (see «SLIDE MOTOR, FRONT UP-DOWN MOTOR, REAR UP-DOWN MOTOR»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power seat control unit. NO - Replace the front-up-down motor/position sensor.

DTC B1827: Power Seat Rear Up-down Motor Pulse Error

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 ). DTC B1827 is stored when the rear up-down switch is operated more than 1 second after the seat moves to the most up or most down position, even when the system is OK.

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1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the power seat adjustment switch in each direction for more than 1 second.
4. Check for the DTCs with the HDS. Is DTC B1827 indicated? YES - Go to step 5. NO - Intermittent failure, the rear up-down motor/position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Check for DTCs with the HDS. Is DTC B1836 also indicated? YES - Troubleshoot DTC B1836 first (see «DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__dtc-b1836-power-seat-position-sensor) ). NO - Go to step 6.
6. Check for DTCs with the HDS. Are DTCs B1825, B1826, and/or B1828 also indicated? YES - Go to step 18 . NO - Go to step 7.
7. Clear the DTCs with the HDS.
8. Turn the ignition switch OFF, and then back ON (II).
9. Operate the rear up-down switch for 2 seconds, and check the rear up-down motor operation. Does the rear up-down motor run smoothly? YES - Go to step 10. NO - Go to step 25 .
10. Turn the ignition switch OFF.
11. Disconnect power seat control unit connector A (40P).
12. Disconnect the rear up-down motor/position sensor 5P connector.
13. Check for continuity between power seat control unit connector A (40P) terminals No. 13 and No. 29 and rear up-down motor/position sensor 5P connector terminals No. 5 and No. 4 respectively. Is there continuity? YES - Go to step 14. NO - Repair an open in the wire.
14. Check for continuity between power seat control unit connector A (40P) terminal No. 13 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 15.
15. Reconnect power seat control unit connector A (40P).
16. Turn the ignition switch ON (II).
17. Measure the voltage between rear up-down motor/position sensor 5P connector terminals No. 5 (+) and No. 4 (-). Is there about 5V? YES - Replace the rear up-down motor/position sensor. NO - If there is no voltage, replace the power seat control unit. If there is battery voltage, repair a short in the wire (sensor line).
18. Turn the ignition switch OFF.
19. Disconnect power seat control unit connector A (40P).
20. Disconnect the rear up-down motor/position sensor 5P connector.
21. Check for continuity between power seat control unit connector A (40P) terminals No. 15 and No. 29 and rear up-down motor/position sensor 5P connector terminals No. 3 and No. 4 respectively. Is there continuity? YES - Go to step 22. NO - Repair an open in the wire.
22. Reconnect power seat control unit connector A (40P).
23. Turn the ignition switch ON (II).
24. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29. Is there battery voltage when the rear up-down switch is operated? YES - Replace the rear up-down motor/position sensor, and recheck for DTCs. NO - Replace the power seat control unit.
25. Turn the ignition switch OFF.
26. Disconnect power seat control unit connector B (18P).
27. Disconnect the rear up-down motor/position sensor 5P connector.
28. Check for continuity between power seat control unit connector B (18P) terminals No. 2 and No. 10 and rear up-down motor/position sensor 5P connector terminals No. 1 and No. 2 respectively. Is there continuity? YES - Go to step 29. NO - Repair an open in the wire.
29. Check for continuity between body ground and rear up-down motor/position sensor 5P connector terminals No. 1 and No. 2 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 30.
30. Do the rear up-down motor test (see «SLIDE MOTOR, FRONT UP-DOWN MOTOR, REAR UP-DOWN MOTOR»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power seat control unit. NO - Replace the rear up-down motor/position sensor.

DTC B1828: Power Seat Recline Motor Pulse Error

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 ). DTC B1828 is stored when the recline switch is operated more than 1 second after the seat back reclines to the most forward or most backward position, even when the system is OK.

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1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the power seat adjustment switch in each direction for more than 1 second each.
4. Check for the DTCs with the HDS. Is DTC B1828 indicated? YES - Go to step 5. NO - Intermittent failure, the recline motor/position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Check for DTCs with the HDS. Is DTC B1836 also indicated? YES - Troubleshoot DTC B1836 first (see «DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__dtc-b1836-power-seat-position-sensor) ). NO - Go to step 6.
6. Check for DTCs with the HDS. Are DTCs B1825, B1826, and/or B1827 also indicated? YES - Go to step 18 . NO - Go to step 7.
7. Clear the DTCs with the HDS.
8. Turn the ignition switch OFF, and then back ON (II).
9. Operate the recline switch for 2 seconds, and check the recline motor operation. Does the recline motor run smoothly? YES - Go to step 10. NO - Go to step 25 .
10. Turn the ignition switch OFF.
11. Disconnect power seat control unit connector A (40P).
12. Disconnect the recline motor/position sensor 5P connector.
13. Check for continuity between power seat control unit connector A (40P) terminals No. 10 and No. 29 and recline motor/position sensor 5P connector terminals No. 5 and No. 4 respectively. Is there continuity? YES - Go to step 14. NO - Repair an open in the wire.
14. Check for continuity between power seat control unit connector A (40P) terminal No. 10 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 15.
15. Reconnect power seat control unit connector A (40P).
16. Turn the ignition switch ON (II).
17. Measure the voltage between recline motor/position sensor 5P connector terminals No. 5 (+) and No. 4 (-). Is there about 5 V? YES - Replace the recline motor/position sensor. NO - If there is no voltage, replace the power seat control unit. If there is battery voltage, repair a short in the wire (sensor line).
18. Turn the ignition switch OFF.
19. Disconnect power seat control unit connector A (40P).
20. Disconnect the recline motor/position sensor 5P connector.
21. Check for continuity between power seat control unit connector A (40P) terminals No. 15 and No. 29 and recline motor/position sensor 5P connector terminals No. 3 and No. 4 respectively. Is there continuity? YES - Go to step 22. NO - Repair an open in the wire.
22. Reconnect power seat control unit connector A (40P).
23. Turn the ignition switch ON (II).
24. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29. Is there battery voltage when the recline switch is operated? YES - Replace the recline motor/position sensor, and recheck for DTCs. NO - Replace the power seat control unit.
25. Turn the ignition switch OFF.
26. Disconnect power seat control unit connector B (18P).
27. Disconnect the recline motor/position sensor 5P connector.
28. Check for continuity between power seat control unit connector B (18P) terminals No. 9 and No. 11 and rear up-down motor/position sensor 5P connector terminals No. 2 and No. 1 respectively. Is there continuity? YES - Go to step 29. NO - Repair an open in the wire.
29. Check for continuity between body ground and recline/position sensor 5P connector terminals No. 1 and No. 2 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 30.
30. Do the recline motor test (see «DRIVER'S POWER SEAT MOTOR TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power seat control unit. NO - Replace the recline motor/position sensor.

DTC B1829: A/T P Signal and VSS Signal Mismatch

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 ).

1. Clear the DTCs with the HDS.
2. Start the engine.
3. Test drive at 6 mph (10 km/h) for 10 seconds.
4. Check for the DTCs with the HDS. Is DTC B1829 indicated? YES - Go to step 5. NO - Intermittent failure. The system is OK at this time. Check for loose or poor connections at the power seat control unit connector.*
5. Check the D indicator of the A/T gear position indicator. Is the D indicator blinking? YES - Go to the automatic transmission system troubleshooting. NO - Go to step 6.
6. Check for the gauge control module DTCs with the HDS. Are there any DTCs indicated? YES - Go to the gauge control module indicated DTCs troubleshooting. NO - Replace the power seat control unit.

DTC B1835: Tilt/Telescopic Switch Signal Input Error

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 ).

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1. Clear the DTC with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the tilt/telescopic switch in each direction for more than 3 seconds each.
4. Check for DTCs with the HDS. Is DTC B1835 indicated? YES - Go to step 5. NO - Intermittent failure, the power tilt/telescopic steering system is OK at this time. Check for loose or poor connections at the tilt/telescopic switch connector and at the power tilt/telescopic control unit connector.
5. Turn the ignition switch OFF.
6. Do the tilt/telescopic switch test (see «POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the switch OK? YES - Go to step 7. NO - Replace the switch.
7. Disconnect power tilt/telescopic steering control unit connector A (16P).
8. Disconnect the tilt/telescopic switch 13P connector.
9. Check for continuity between body ground and tilt/telescopic switch 13P connector terminals No. 1, No. 3, No. 6, No. 7, and No. 10 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 10.
10. Check for continuity between power tilt/telescopic steering control unit connector A (16P) terminals No. 7, No. 6, No. 10, No. 14, and No. 15 and the tilt/telescopic switch 13P connector terminals No. 1, No. 7, No. 3, No. 10, and No. 6 respectively. Is there continuity? YES - Replace the power tilt/telescopic steering control unit. NO - Repair open in the wire.

DTC B1836: Power Seat Position Sensor Circuit Short

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 ).

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1. Clear the DTC with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the power seat adjustment switch in each direction for more than 1 second each.
4. Check for DTCs with the HDS. Is DTC B1836 indicated? YES - Go to step 5. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connectors.
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the slide position sensor 3P connector and each 5P connector from the recline motor/position sensor, the front up-down motor/position sensor, and the rear up-down motor/position sensor.
8. Check for continuity between power seat control unit connector A (40P) terminal No. 15 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 9.
9. At the sensor side, check for continuity between the No. 3 terminal of each position sensor and body ground (motor body). Is there continuity? YES - Replace the motor/position sensor that has continuity. NO - Replace the power seat control unit.

DTC B1837: Driving Position Memory Recall Timeout

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 ).

1. Clear the DTC with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Move the steering position to the full tilt up and full telescopic out positions with the power tilt/telescopic steering switch.
4. Move both power mirrors to the full up and full left positions with the power mirror switch.
5. Move the power seat to the full front up and full rear up positions, then slide the seat all the way back and completely recline the seat-back backward with the power seat adjustment switch.
6. Put this seating position into memory with the driving position memory switch.
7. Manually move the seat to the complete opposite of the positions just memorized.
8. Recall the memory positions with the driving position memory switch.
9. Wait for 3 minutes.
10. Check for DTCs with the HDS. Are any DTCs indicated? YES - Go to step 11. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at each DPMS connector.
11. Check for DTCs with the HDS. Are any DTCs other than B1837 indicated? YES - Go to the indicated DTCs troubleshooting. NO - Go to step 12.
12. Clear the DTCs with the HDS.
13. Wait for 6 seconds.
14. Move the motors shown one at a time, and check the operation time. Steering tilt motor up and down Steering telescopic motor pulled and pushed Power mirror actuator (up, down, left, right) Power seat (slide forward/backward, recline forward/backward, front up-down, rear up-down) Does any motor fail to run smoothly? YES - Go to the failed motor test: Power tilt/telescopic motor test (see «POWER TILT/TELESCOPIC STEERING MOTOR TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Power mirror actuator test (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ). Power seat motor test (see «DRIVER'S POWER SEAT MOTOR TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). If the motor is OK, check the engagement of the motor gear. NO - Go to the each input test: Power seat control unit input test (see «POWER SEAT CONTROL UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__power-seat-control-unit-input-test) ). Power tilt/telescopic steering control unit input test (see «POWER TILT/TELESCOPIC STEERING CONTROL UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__power-tilttelescopic-steering-control-unit-input) ). Driver's MPCS unit input test (see «DRIVER'S MPCS UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/communication-devices/#multiplex-integrated-control-system__drivers-mpcs-unit-input-test) ).

DTC B1840: Tilt Motor Pulse Error

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 ).

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the tilt switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1840 indicated? YES - Go to step 5. NO - Intermittent failure, the tilt position sensor is OK at this time. Check for loose or poor connections at the tilt motor/position sensor connector and at the power tilt/telescopic control unit connector.
5. Check for DTCs with the HDS. Is DTC B1841 also indicated? YES - Go to step 17 . NO - Go to step 6.
6. Clear the DTCs with the HDS.
7. Turn the ignition switch OFF, and then back ON (II).
8. Operate the tilt switch for 2 seconds, and check the tilt motor operation. Does the tilt motor run smoothly? YES - Go to step 9. NO - Go to step 26 .
9. Turn the ignition switch OFF.
10. Disconnect power tilt/telescopic control unit connector A (16P).
11. Disconnect the tilt motor/position sensor 6P connector.
12. Check for continuity between power tilt/telescopic control unit connector A (16P) terminals No. 4, No. 12, and No. 16 and tilt motor/position sensor 6P connector terminals No. 4, No. 5, and No. 6 respectively. Is there continuity? YES - Go to step 13. NO - Repair an open in the wire.
13. Check for continuity between body ground and power tilt/telescopic control unit connector A (16P) terminals No. 4 and No. 12 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 14.
14. Reconnect power tilt/telescopic control unit connector A (16P).
15. Turn the ignition switch ON (II).
16. Measure the voltage between tilt motor/position sensor 6P connector terminals No. 4 and No. 6 and between terminals No. 5 and No. 6. Is there about 5 V? YES - Faulty tilt motor/position sensor, replace the tilt motor assembly. NO - If there is no voltage, replace the power tilt/telescopic control unit. If there is battery voltage, repair a short in the wire.
17. Turn the ignition switch OFF.
18. Disconnect power tilt/telescopic control unit connector A (16P).
19. Disconnect the tilt motor/position sensor 6P connector.
20. Check for continuity between power tilt/telescopic control unit connector A (16P) terminals No. 2 and No. 16 and tilt motor/position sensor 6P connector terminals No. 3 and No. 6 respectively. Is there continuity? YES - Go to step 21. NO - Repair an open in the wire.
21. Disconnect the telescopic motor/position sensor 8P connector.
22. Check for continuity between tilt motor/position sensor 6P connector terminal No. 3 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 23.
23. Reconnect power tilt/telescopic control unit connector A (16P).
24. Turn the ignition switch ON (II).
25. Measure the voltage between power tilt/telescopic control unit connector A (16P) terminals No. 2 and No. 16. Is there battery voltage when the tilt switch is operated? YES - Faulty tilt motor/position sensor, replace the tilt motor assembly. NO - Replace the power tilt/telescopic control unit.
26. Turn the ignition switch OFF.
27. Disconnect power tilt/telescopic control unit connector B (8P).
28. Disconnect the tilt motor/position sensor 6P connector.
29. Check for continuity between power tilt/telescopic control unit connector B (8P) terminals No. 7 and No. 8 and tilt motor/position sensor 6P connector terminals No. 1 and No. 2 respectively. Is there continuity? YES - Go to step 30. NO - Repair an open in the wire.
30. Check for continuity between body ground and tilt motor/position sensor 6P connector terminals No. 1 and No. 2 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 31.
31. Do the tilt motor test (see «POWER TILT/TELESCOPIC STEERING MOTOR TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power tilt/telescopic control unit. NO - Replace the tilt motor/position sensor.

DTC B1841: Telescopic Motor Pulse Error

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 ).

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the telescopic switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1841 indicated? YES - Go to step 5. NO - Intermittent failure, the tilt position sensor is OK at this time. Check for loose or poor connections at the telescopic motor/position sensor connector and at the power tilt/telescopic control unit connector.
5. Clear the DTCs with the HDS. Is DTC B1840 also indicated? YES - Go to step 17 . NO - Go to step 6.
6. Clear the DTCs with the HDS.
7. Turn the ignition switch OFF, and then back ON (II).
8. Operate the telescopic switch for 2 seconds, and check the telescopic motor operation. Does the telescopic motor run smoothly? YES - Go to step 9. NO - Go to step 26 .
9. Turn the ignition switch OFF.
10. Disconnect power tilt/telescopic control unit connector A (16P).
11. Disconnect the telescopic motor/position sensor 8P connector.
12. Check for continuity between power tilt/telescopic control unit connector A (16P) terminals No. 5, No. 13, and No. 16 and telescopic motor/position sensor 8P connector terminals No. 6, No. 7, and No. 8 respectively. Is there continuity ? YES - Go to step 13. NO - Repair an open in the wire.
13. Check for continuity between body ground and power tilt/telescopic control unit connector A (16P) terminals No. 5 and No. 13 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 14.
14. Reconnect power tilt/telescopic control unit connector A (16P).
15. Turn the ignition switch ON (II).
16. Measure the voltage between telescopic motor/position sensor 8P connector terminals No. 6 and No. 8 and between terminals No. 7 and No. 8. Is there about 5 V? YES - Faulty telescopic motor/position sensor, replace the telescopic motor assembly. NO - If there is no voltage, replace the power tilt/telescopic control unit. If there is battery voltage, repair a short in the wire.
17. Turn the ignition switch OFF.
18. Disconnect power tilt/telescopic control unit connector A (16P).
19. Disconnect the telescopic motor/position sensor 8P connector.
20. Check for continuity between power tilt/telescopic control unit connector A (16P) terminals No. 2 and No. 16 and telescopic motor/position sensor 8P connector terminals No. 5 and No. 8 respectively. Is there continuity? YES - Go to step 21. NO - Repair an open in the wire.
21. Disconnect the tilt motor/position sensor 6P connector.
22. Check for continuity between telescopic motor/position sensor 8P connector terminal No. 5 and body ground. Is there continuity? YES - Repair a short to ground in the wire. I NO - Go to step 23.
23. Reconnect power tilt/telescopic control unit connector A (16P).
24. Turn the ignition switch ON (II).
25. Measure the voltage between power tilt/telescopic control unit connector A (16P) terminals No. 2 and No. 16. Is there battery voltage when the telescopic switch is operated? YES - Faulty telescopic motor/position sensor, replace the telescopic motor assembly. NO - Replace the power tilt/telescopic control unit.
26. Turn the ignition switch OFF.
27. Disconnect power tilt/telescopic control unit connector B (8P).
28. Disconnect the telescopic motor/position sensor 8P connector.
29. Check for continuity between power tilt/telescopic control unit connector B (8P) terminals No. 4 and No. 6 and telescopic motor/position sensor 8P connector terminals No. 2 and No. 3 respectively. Is there continuity? YES - Go to step 30. NO - Repair an open in the wire.
30. Check for continuity between body ground and telescopic motor/position sensor 8P connector terminals No. 2 and No. 3 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 31.
31. Do the telescopic motor test (see «POWER TILT/TELESCOPIC STEERING MOTOR TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the motor OK? YES - Replace the power tilt/telescopic control unit. NO - Replace the telescopic motor/position sensor.

DTC B1842: Power Tilt/Telescopic Position Sensor Power Supply Circuit (SVCC Line) Short

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 ).

Scheme 59

Scheme 60

Scheme 61

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the tilt/telescopic switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1842 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections at the tilt motor/position sensor connector, at the telescopic motor/position sensor connector, and at the power tilt/telescopic control unit connector.
5. Turn the ignition switch OFF.
6. Disconnect power tilt/telescopic control unit connector A (16P).
7. Disconnect the telescopic motor/position sensor 8P connector.
8. Disconnect the tilt motor/position sensor 6P connector.
9. Check for continuity between power tilt/telescopic control unit connector A (16P) terminal No. 2 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 10.
10. At the sensor side, check for continuity between telescopic motor/position sensor 8P connector terminal No. 5 and body ground (motor body). Is there continuity? YES - Repair a short in the wire. NO - Go to step 11.
11. At the sensor side, check for continuity between tilt motor/position sensor 6P connector terminal No. 3 and body ground (motor body). Is there continuity? YES - Replace the tilt motor/position sensor. NO - Replace the power tilt/telescopic control unit.

DTC B1843: Power Seat Control Unit Lost Communication with Power Tilt/Telescopic Steering Control Unit (UART Line)

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 ).

Scheme 62

Scheme 63

Scheme 64

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS. Is DTC B1843 indicated? YES - Go to step 4. NO - Intermittent failure, the communication system is OK at this time. Check for loose or poor connections at the power seat control unit.
4. Move the tilt/telescopic steering in each direction with the tilt/telescopic switch. Does the tilt/telescopic steering move in each direction smoothly? YES - Go to step 5. NO - Go to step 10 .
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect power tilt/telescopic control unit connector A (16P).
8. Check for continuity between power seat control unit connector A (40P) terminal No. 39 and power tilt/telescopic control unit connector A (16P) terminal No. 11. Is there continuity? YES - Go to step 9. NO - Repair an open in the wire.
9. Check for continuity between power seat control unit connector A (40P) terminal No. 39 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Substitute a known-good power tilt/telescopic control unit and recheck. If DTC B1843 is still indicated, replace the power seat control unit.
10. Turn the ignition switch OFF.
11. Disconnect power tilt/telescopic steering control unit connectors A (16P) and B (8P).
12. Turn the ignition switch ON (II).
13. Measure the voltage between power tilt/telescopic steering control unit connector A (16P) terminal No. 9 and connector B (8P) terminal No. 1, and between connector A (16P) terminal No. 1 and connector B (8P) terminal No. 1. Is there battery voltage? YES - Replace the power tilt/telescopic steering control unit. NO - Do the power tilt/telescopic steering control unit input test (see «POWER TILT/TELESCOPIC STEERING CONTROL UNIT INPUT TEST»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms__power-tilttelescopic-steering-control-unit-input) ).

DTC B1844: Power Seat Slide Switch Circuit 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 ).

Scheme 65

Scheme 66

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the slide switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1844 indicated? YES - Go to step 5. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the power seat adjustment switch 12P connector and C901 under the driver's seat.
8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 7, and No. 27 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 9.
9. Check for continuity between these power seat control unit connector A (40P) terminals: No. 1 and No. 7 No. 1 and No. 27 No. 7 and No. 27 Is there continuity? YES - Repair a short in the wire. NO - Go to step 10.
10. Do the power seat adjustment switch test (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the switch OK? YES - Replace the power seat control unit. NO - Replace the power seat adjustment switch.

DTC B1845: Power Seat Recline Switch Circuit 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 ).

Scheme 67

Scheme 68

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the recline switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1845 indicated? YES - Go to step 5. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the power seat adjustment switch 12P connector and C901 under the driver's seat.
8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 6, and No. 25 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 9.
9. Check for continuity between these power seat control unit connector A (40P) terminals: No. 1 and No. 6 No. 1 and No. 25 No. 6 and No. 25 Is there continuity? YES - Repair a short in the wire. NO - Go to step 10.
10. Do the power seat adjustment switch test (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the switch OK? YES - Replace the power seat control unit. NO - Replace the power seat adjustment switch.

DTC B1846: Power Seat Front Up-Down Switch Circuit 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 ).

Scheme 69

Scheme 70

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the front up-down switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1846 indicated? YES - Go to step 5. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the power seat adjustment switch 12P connector and C901 under the driver's seat.
8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 4, and No. 5 individually. Is there continuity? YES - Repair a short to ground in the wire. I NO - Go to step 9.
9. Check for continuity between these power seat control unit connector A (40P) terminals: No. 1 and No. 4 No. 1 and No. 5 No. 4 and No. 5 Is there continuity? YES - Repair a short in the wire. NO - Go to step 10.
10. Do the power seat adjustment switch test (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the switch OK? YES - Replace the power seat control unit. NO - Replace the power seat adjustment switch.

DTC B1847: Power Seat Rear Up-Down Switch Circuit 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 ).

Scheme 71

Scheme 72

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Operate the rear up-down switch in each direction for more than 1 second.
4. Check for DTCs with the HDS. Is DTC B1847 indicated? YES - Go to step 5. NO - Intermittent failure, the driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connector.
5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the power seat adjustment switch 12P connector and C901 under the driver's seat.
8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 3, and No. 23 individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 9.
9. Check for continuity between these power seat control unit connector A (40P) terminals: No. 1 and No. 3 No. 1 and No. 23 No. 3 and No. 23 Is there continuity? YES - Repair a short in the wire. NO - Go to step 10.
10. Do the power seat adjustment switch test (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ). Is the switch OK? YES - Replace the power seat control unit. NO - Replace the power seat adjustment switch.

DTC B2182: Left Power Mirror Horizontal Sensor Signal Error

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 ).

Scheme 73

Scheme 74

Scheme 75

Scheme 76

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Move the left power mirror in each direction with the power mirror switch.
4. Check for DTCs with the HDS. Is DTC B2182 indicated? YES - Go to step 5. NO - Intermittent failure, the left power mirror system is OK at this time. Check for loose or poor connections at the left power mirror connector and at the driver's MPCS unit connector.
5. Select POWER SEAT/POWER MIRROR from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.
6. Check the NORMAL/ABNORMAL information of the DRIVER DOOR MIRROR HORIZONTAL SENSOR in the DATA LIST. Is the information indicator ABNORMAL? YES - Go to step 7. NO - Replace the driver's MPCS unit.
7. Turn the ignition switch OFF.
8. Disconnect driver's MPCS unit connector A (40P).
9. Disconnect the left power mirror 16P connector.
10. Check for continuity between driver's MPCS unit connector A (40P) terminal No. 10 and left power mirror 16P connector terminal No. 4. Is there continuity? YES - Go to step 11. NO - Repair an open in the wire.
11. Check for continuity between left power mirror 16P connector terminal No. 4 and body ground. Is there continuity? YES - Repair a short to ground in the wire. I NO - Go to step 12.
12. Check for continuity between left power mirror 16P connector terminals No. 4 and No. 12. Is there continuity? YES - Repair a short in the wires. NO - Go to step 13.
13. Reconnect driver's MPCS unit connector A (40P).
14. Turn the ignition switch ON (II).
15. Measure the voltage between left power mirror 16P connector terminal No. 4 and body ground. Is there about 5 V? YES - Replace the left power mirror. NO - Replace the driver's MPCS unit.

DTC B2183: Left Power Mirror Vertical Sensor Signal Error

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 ).

Scheme 77

Scheme 78

Scheme 79

Scheme 80

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Move the left power mirror in each direction with the power mirror switch.
4. Check for DTCs with the HDS. Is DTC B2183 indicated? YES - Go to step 5. NO - Intermittent failure, the left power mirror system is OK at this time. Check for loose or poor connections at the power mirror connector and at the driver's MPCS unit connector.
5. Select POWER SEAT/POWER MIRROR from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.
6. Check the NORMAL/ABNORMAL information of the DRIVER DOOR MIRROR VERTICAL SENSOR in the DATA LIST. Is the information indicator ABNORMAL? YES - Go to step 7. NO - Replace the driver's MPCS unit.
7. Turn the ignition switch OFF.
8. Disconnect driver's MPCS unit connector A (40P).
9. Disconnect the left power mirror 16P connector.
10. Check for continuity between driver's MPCS unit connector A (40P) terminal No. 9 and left power mirror 16P connector terminal No. 11. Is there continuity? YES - Go to step 11. NO - Repair an open in the wire.
11. Check for continuity between left power mirror 16P connector terminal No. 11 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 12.
12. Check for continuity between left power mirror 16P connector terminals No. 11 and No. 12. Is there continuity? YES - Repair a short in the wires. NO - Go to step 13.
13. Reconnect driver's MPCS unit connector A (40P).
14. Turn the ignition switch ON (II).
15. Measure the voltage between left power mirror 16P connector terminal No. 11 and body ground. Is there about 5 V? YES - Replace the left power mirror. NO - Replace the driver's MPCS unit.

DTC B2184: Right Power Mirror Horizontal Sensor Signal Error

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 ).

Scheme 81

Scheme 82

Scheme 83

Scheme 84

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Move the right power mirror in each direction with the power mirror switch.
4. Check for DTCs with the HDS. Is DTC B2184 indicated? YES - Go to step 5. NO - Intermittent failure, the right power mirror system is OK at this time. Check for loose or poor connections at the right power mirror connector and at the front passenger's MPCS unit connector.
5. Select POWER SEAT/POWER MIRROR from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.
6. Check the NORMAL/ABNORMAL information of the ASSISTANT DOOR MIRROR HORIZONTAL SENSOR in the DATA LIST. Is the information indicator ABNORMAL? YES - Go to step 7. NO - Replace the front passenger's MPCS unit.
7. Turn the ignition switch OFF.
8. Disconnect front passenger's MPCS unit connector A (28P).
9. Disconnect the right power mirror 16P connector.
10. Check for continuity between front passenger's MPCS unit connector A (28P) terminal No. 6 and right power mirror 16P connector terminal No. 4. Is there continuity? YES - Go to step 11. NO - Repair an open in the wire.
11. Check for continuity between right power mirror 16P connector terminal No. 4 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 12.
12. Check for continuity between left power mirror 16P connector terminals No. 4 and No. 12. Is there continuity? YES - Repair a short in the wires. NO - Go to step 13.
13. Reconnect front passenger's MPCS unit connector A (28P).
14. Turn the ignition switch ON (II).
15. Measure the voltage between right power mirror 16P connector terminal No. 4 and body ground. Is there about 5 V? YES - Replace the right power mirror. NO - Replace the front passenger's MPCS unit. I

DTC B2185: Right Power Mirror Vertical Sensor Signal Error

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 ).

Scheme 85

Scheme 86

Scheme 87

Scheme 88

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Move the right power mirror in each direction with the power mirror switch.
4. Check for DTCs with the HDS. Is DTC B2185 indicated? YES - Go to step 5. NO - Intermittent failure, the right power mirror system is OK at this time. Check for loose or poor connections at the right power mirror connector and at the front passenger's MPCS unit connector.*
5. Select POWER SEAT/POWER MIRROR from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.
6. Check the NORMAL/ABNORMAL information of the ASSISTANT DOOR MIRROR VERTICAL SENSOR in the DATA LIST. Is the information indicator ABNORMAL? YES - Go to step 7. NO - Replace the front passenger's MPCS unit.
7. Turn the ignition switch OFF.
8. Disconnect front passenger's MPCS unit connector A (28P).
9. Disconnect the right power mirror 16P connector.
10. Check for continuity between front passenger's MPCS unit connector A (28P) terminal No. 5 and right power mirror 16P connector terminal No. 11. Is there continuity? YES - Go to step 11. NO - Repair an open in the wire.
11. Check for continuity between right power mirror 16P connector terminal No. 11 and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Go to step 12.
12. Check for continuity between left power mirror 16P connector terminals No. 11 and No. 12. Is there continuity? YES - Repair a short in the wires. NO - Go to step 13.
13. Reconnect front passenger's MPCS unit connector A (28P).
14. Turn the ignition switch ON (II).
15. Measure the voltage between right power mirror 16P connector terminal No. 11 and body ground. Is there about 5 V? YES - Replace the right power mirror. NO - Replace the front passenger's MPCS unit.

System Input Test and Function Test

1. Connect the HDS to the DLC.
2. Turn the ignition switch ON (II).
3. From the BODY ELECTRICAL SYSTEM SELECTION menu, select POWER SEAT/POWER MIRROR, then DTCs. If DTCs are found, troubleshoot the DTCs using B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(/acura/rl/ii-2004-2008/remont/communication-devices/#multiplex-integrated-control-system__troubleshooting-b-can-system-diagnosis-test) ). If no DTCs are found, go to step 4.
4. Exit the DTC mode, and select the DATA LIST from the POWER SEAT/POWER MIRROR TEST MODE MENU.
5. Test each input and monitor each output under the condition show below: If the data list indication is correct, continue to the next switch. If all switches are OK, go to step 6. If the data list indication is not correct, do the appropriate test at the control unit and terminal indicated in the table. Voltage drop tests should be done with the ignition switch ON (II) and all connectors connected and the meter negative test lead attached to a good body ground. Continuity tests should be done with the ignition switch OFF and indicated terminals disconnected. DATA LIST Data List Input/Command Condition: Data List Indication Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Door Mirror UP Switch Mirror select switch in LEFT, then RIGHT Mirror up switch pressed: ON Mirror up switch released: OFF MICU/P9 (WHT) Mirror select switch UP: 0 V Center or DOWN: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Door Mirror Select in LEFT selection Mirror select switch in LEFT position: ON Select switch in CENTER or RIGHT position: OFF MICU/P11 (PUR) Mirror select switch LEFT: 0 V Center or RIGHT: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Door Mirror DOWN Switch Mirror select switch in LEFT, then RIGHT Mirror down switch pressed: ON Mirror switch released: OFF MICU/P10(PNK) Mirror select switch DOWN: 0 V Center or UP: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Door Mirror Select in Right selection Mirror select switch in RIGHT position: ON Select switch in CENTER or LEFT position: OFF MICU/P22 (GRY) Mirror select switch RIGHT: 0 V Center or LEFT: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Door Mirror LEFT Switch Mirror select switch in LEFT, then RIGHT Mirror left switch pressed: ON Mirror switch released: OFF MICU/P25 (GRN) Mirror select switch LEFT: 0 V Center or RIGHT: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Door Mirror RIGHT Switch Mirror select switch in LEFT, then RIGHT Mirror right switch pressed: ON Mirror switch released: OFF MICU/P26 (BLU) Mirror select switch RIGHT: 0 V Center or LEFT: 5 V Faulty switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/mirrors/#power-mirrors) ) An open in the wire A short in the wire Faulty control unit Slide Switch Forward Slide switch forward: ON Switch released: OFF Power seat control unit/A1, A7 (BLU) Slide switch forward: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Slide Switch Backward Slide switch backward: ON Switch released: OFF Power seat control unit/A1, A27 (ORN/BLU) Slide switch backward: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Recline Switch Forward Recline switch forward: ON Switch released: OFF Power seat control unit/A1, A6 (WHT/YEL) Recline switch forward: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Recline Switch Backward Recline switch backward: ON Switch released: OFF Power seat control unit/A1, A25 (ORN/GRN) Recline switch backward: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Front Up-Down Switch Up Front up-down switch up: ON Switch released: OFF Power seat control unit/A1, A5 (GRN/BLU) Front up-down switch up: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Front Up-Down Switch Down Front up-down switch down: ON Switch released: OFF Power seat control unit/A1, A4 (RED/BLK) Front up-down switch down: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Rear Up-Down Switch Up Rear up-down switch up: ON Switch released: OFF Power seat control unit/A1, A23 (GRN/ORN) Rear up-down switch up: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Rear Up-Down Switch Down Rear up-down switch down: ON Switch released: OFF Power seat control unit/A1, A3 (BRN/BLK) Rear up-down switch up: 0 V Switch released: 5 V Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Ignition Switch for Power Seat Control Ignition switch ON (II): ON Ignition switch OFF: OFF Power seat control unit/A35 (BLK/YEL) Ignition switch ON (II): 12 V Blown No. 21 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire Faulty control unit A/T Gear Position Switch (P) Transmission range switch P position: ON Any other position than P: OFF Power seat control unit/A31 (BLK/BLU) Transmission range switch P: 0 V Faulty transmission range switch An open in the wire Faulty control unit Seat MEMO Switch Seat MEMO switch pressed: ON Switch released: OFF Driver's MPCS unit/A31 (ORN) Seat MEMO switch pressed: 0 V Switch released: 5 V more Faulty switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Poor ground (G601) Driver 1 Position Switch Driver position 1 switch pressed: ON Switch released: OFF Driver's MPCS unit/A29 (GRN) Driver's position 1 switch pressed: 0 V Switch released: 5 V more Faulty switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Poor ground (G601) Driver 2 Position Switch Driver position 2 switch pressed: ON Switch released: OFF Driver's MPCS unit/A30 (RED) Driver's position 2 switch pressed: 0 V Switch released: 5 V more Faulty switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Poor ground (G601) Column Tilt Up Switch Steering tilt switch up: ON Switch released: OFF Power tilt/telescopic steering control unit/A15 (BRN), A7 (LT GRN) Switch in TILT UP: 0 V Switch released: Battery voltage Faulty switch (see «POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Column Tilt Down Switch Steering tilt switch down: ON Switch released: OFF Power tilt/telescopic steering control unit/A15 (BRN), A6 (GRN) Switch in TILT DOWN: 0 V Switch released: Battery voltage Faulty switch (see «POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Column Telescopic Pull Switch Steering telescopic switch pull: ON Switch released: OFF Power tilt/telescopic steering control unit/A15 (BRN), A14 (PUR) Switch in TELESCOPIC PULL: 0 V Switch released: Battery voltage Faulty switch (see «POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Column Telescopic Push Switch Steering telescopic switch push: ON Switch released: OFF Power tilt/telescopic steering control unit/A15 (BRN), A6 (GRN) Switch in TELESCOPIC PUSH: 0 V Switch released: Battery voltage Faulty switch (see «POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT»(/acura/rl/ii-2004-2008/remont/memory-modules/#driver-position-memory-system-dpms) ) An open in the wire A short in the wire Faulty control unit Ignition Switch (ETS) Ignition switch ON (II): ON Ignition switch OFF: OFF Power tilt/telescopic steering control unit/A9 (YEL) Ignition switch ON (II): 12 V Blown No. 21 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire Faulty control unit Slide Sensor Seat moving forward or backward: ON Seat not moving: OFF Power seat control unit/A11 (YEL/GRN) Pulses as seat moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Front Up-Down Sensor Seat front moving up/down: ON Seat not moving: OFF Power seat control unit/A12 (YEL/BLK) Pulses as seat moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Recline Sensor Seat-back moving forward or backward: ON Seat not moving: OFF Power seat control unit/A10 (WHT/RED) Pulses as seat moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Rear Up-Down Sensor Seat rear moving up/down: ON Seat not moving: OFF Power seat control unit/A13 (YEL/BLK) Pulses as seat moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Column Tilt Sensor Steering tilting up/down: ON Steering not moving: OFF Power tilt/telescopic steering control unit/A4 (ORN), A12 (BLU) Pulses as steering moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Column Telescopic Sensor Steering telescopic pull/push: ON Steering not moving: OFF Power tilt/telescopic steering control unit/A5 (LT BLU), A13 (YEL) Pulses as steering moves: 2.5 V average Faulty sensor An open in the wire Faulty control unit Left Mirror Horizontal Sensor Left mirror moves left/right: NORMAL Left mirror does not move: ABNORMAL Driver's MPCS unit/A10 (PUR), A19(WHT) Left mirror moving from full left to full right: A10 (about 0.5 V to 4.5V),A19(5V) Faulty sensor An open in the wire Faulty control unit Left Mirror Vertical Sensor Left mirror moves up/down: NORMAL Left mirror stopped: ABNORMAL Driver's MPCS unit/A9 (BLU), A19 (WHT) Left mirror moving from full down to full up: A9 (about 0.5 V to 4.5 V),A19(5V) Faulty sensor An open in the wire Faulty control unit Right Door Mirror Horizontal Sensor Right mirror moves left/right: NORMAL Right mirror stopped: ABNORMAL Front passenger's MPCS unit/A6 (BLU), A13 (PNK) Right mirror moving from full left to full right: A6 (about 0.5 V to 4.5 V),A13 (5V) Faulty sensor An open in the wire Faulty control unit Right Door Mirror Vertical Sensor Right mirror moves up/down: NORMAL Right mirror stopped: ABNORMAL Front passenger's MPCS unit/A5 (RED),A13(PNK) Right mirror moving from full down to full up: A5 (about 0.5 V to 4.5V),A13(5V) Faulty sensor An open in the wire Faulty control unit DPMS MEM Switch Driving position memory switch MEMO button pushed: ON Switch released: OFF Driver's MPCS unit/A31 (ORN) Driving position memory switch MEMO button pushed: A31 (about 1 V or less) MEMO button released: A31 (5 V or more) Faulty switch An open in the wire A short in the wire Faulty control unit DPMS POS1 Switch Driving position memory switch POS1 button pushed: ON Switch released: OFF Driver's MPCS unit/A29 (GRN) Driving position memory switch POS1 button pushed: A29 (about 1 V or more) POS1 button released: A29 (5 V or more) Faulty switch An open in the wire A short in the wire Faulty control unit DPMS POS2 Switch Driving position memory switch POS2 button pushed: ON Switch released: OFF Driver's MPCS unit/A30 (RED) Driving position memory switch POS2 button pushed: A30 (about 1 V or more) POS2 button released: A30 (5 V or more) Faulty switch An open in the wire A short in the wire Faulty control unit Left Door Mirror Horizontal Sensor Left mirror moves left/right: NORMAL Left mirror does not move: ABNORMAL Driver's MPCS unit/A10 (PUR), A19 (WHT) Left mirror moving from full left to full right: A10 (about 0.5V to 4.5V),A19(5V) Faulty sensor An open in the wire Faulty control unit Left Door Mirror Vertical Sensor Left mirror moves up/down: ON Left mirror stopped: OFF Driver's MPCS unit/A9 (BLU), A19 (WHT) Left mirror moving from full down to full up: A9 (about 0.5 V to 4.5 V),A19(5V) Faulty sensor An open in the wire Faulty control unit Right Door Mirror Horizontal Sensor Right mirror moves left/right: ON Right mirror stopped: OFF Front passenger's MPCS unit/A6 (BLU),A13(PNK) Right mirror moving from full left to full right: A6 (about 0.5 V to 4.5 V),A13(5V) Faulty sensor An open in the wire Faulty control unit Right Door Mirror Vertical Sensor Right mirror moves up/down: ON Right mirror stopped: OFF Front passenger's MPCS unit/A5 (RED),A13(PNK) Right mirror moving from full down to full up: A5 (about 0.5 V to 4.5 V), A13(5V) Faulty sensor An open in the wire Faulty control unit
6. Exit the data list and select function test.
7. Do each of the function tests listed in the table shown. The appropriate output should occur. If the function operates normally, go to the next function test. If all function tests operate normally, the system is OK. If the function does not occur, do the appropriate test at the control unit and terminal indicated in the table. Voltage drop tests should be done with the ignition switch ON and all connectors connected. Continuity tests should be done with the ignition switch OFF and indicated terminals disconnected. Jumper tests should be done according to the instructions indicated. If the test indicates that the component operates normally, but the function will not operate by doing the function test or the normal use of the component, the control unit that operates that function must be faulty; replace it. If the test indicates that the component does not operate normally, check for an open or short in the harnesses between the component and the control unit. If the harness is OK, replace the component. COMPONENT AND OPERATION CHART Function Test Component and Operation Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Power Seat: Slide Motor-Full Forward Seat slides forward Power seat control unit/B8 (BLU), A9 (BLK), B7 (WHT), B17 (YEL) Disconnect power seat control unit connectors A and B. Connect B8 to B17 and B7 to A9; driver's seat should slide forward. Faulty motor An open in the wire A short in the wire Power Seat: Slide Motor-Full Backward Seat slides backward Power seat control unit/B8 (BLU), A9 (BLK), B7 (WHT), B17 (YEL) Disconnect power seat control unit connectors A and B. Connect B8 to B7 and B17 to A9; driver's seat should slide backward. Faulty motor An open in the wire A short in the wire Power Seat: Front UP-DOWN Motor-Full Up Front of seat moves up Power seat control unit/B8 (BLU), A9 (BLK), B6 (BRN/WHT), B16(ORN) Disconnect power seat control unit connectors A and B. Connect B8 to B16 and B6 to A9; front of driver's seat should move up. Faulty motor An open in the wire A short in the wire Power Seat: Front UP-DOWN Motor-Full Down Front of seat moves down Power seat control unit/B8 (BLU), A9 (BLK), B6 (BRN/WHT), B16 (ORN) Disconnect power seat control unit connectors A and B. Connect B8 to B6 and B16 to A9; front of driver's seat should move down. Faulty motor An open in the wire A short in the wire Power Seat: Rear Up-Down Motor-Full Up Rear of seat moves up Power seat control unit/B1 (RED), A9 (BLK), B2 (GRN), B10(BLU/GRN) Disconnect power seat control unit connectors A and B. Connect B1 to B2 and BIO to A9; rear of driver's seat should move up. Faulty motor An open in the wire A short in the wire Power Seat: Rear Up-Down Motor-Full Down Rear of seat moves down Power seat control unit/B1 (RED), A9 (BLK), B2 (GRN), B10(BLU/GRN) Disconnect power seat control unit connectors A and B. Connect B1 to B10 and B2 to A9; rear of driver's seat should move down. Faulty motor An open in the wire A short in the wire Power Seat: Recline Motor-Full Forward Seat back moves forward Power seat control unit/B1 (RED), A9 (BLK), B9 (RED), B1 (GRY) Disconnect power seat control unit connectors A and B. Connect B1 to B11 and B9 to A9; driver's seat back should move forward. Faulty motor An open in the wire A short in the wire Power Seat: Recline Motor-Full Backward Seat back moves backward Power seat control unit/BI (RED),A9 (BLK), B9 (RED), B11 (GRY) Disconnect power seat control unit connectors A and B. Connect B1 to B9 and B11 to A9; driver's seat back should move backward. Faulty motor An open in the wire A short in the wire Column Tilt Power tilt/telescopic steering tilts up Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B7 (ORN), B8 (LT BLU) Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B8 and B1 to B7; steering tilts up. Faulty motor An open in the wire A short in the wire Column Tilt Power tilt/telescopic steering tilts down Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B7 (ORN), B8 (LT BLU) Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B8 and B1 to B7; steering tilts down. Faulty motor An open in the wire A short in the wire Column Telescopic Power tilt/telescopic steering telescopic pull Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B6 (PNK), B4 (LT GRN) Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B7 and B1 to B8; steering telescopic pull. Faulty motor An open in the wire A short in the wire Column Telescopic Power tilt/telescopic steering telescopic push Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B6 (PNK), B4 (LT GRN) Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B6 and B1 to B4; steering telescopic push. Faulty motor An open in the wire A short in the wire

Power Seat Control Unit Input Test

Note. Before testing, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 89

1. Turn the ignition switch OFF.
2. Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/seats/#seats__front-seat-removalinstallation) ). NOTE: Be careful not to scratch the interior trim.
3. Disconnect the 40P connector (A) and 18P connector (B) from the power seat control unit (C).
4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to step 5.
5. With the connectors still disconnected, make the input test at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 6. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A37 BLU Under all conditions Check for continuity between the A37 terminal and power sunshade control unit 5P connector No. 3 terminal. There should be continuity. An open in the wire
6. Reconnect the connectors to the power seat control unit, and make these input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If ail the input tests prove OK, the control unit must be faulty; replace it. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A9 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G601) An open in the wire B4 BLK B18 BLK A35 BLK/YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 21 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire B37 BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40A) fuse in the under-hood fuse/relay box Blown No. 7 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire B1 RED Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 20 (40A) fuse in the under-hood fuse/relay box Blown No. 16 (20A) fuse in the driver's under-dash fuse/relay box An open in the wire B8 BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 20 (40A) fuse in the under-hood fuse/relay box Blown No. 14 (20A) fuse in the driver's under-dash fuse/relay box An open in the wire A31 BLK/BLU Shift lever in P position Measure the voltage to ground: There should be less than 1 V. Faulty transmission range switch An open in the wire Shift lever out of P position Measure the voltage to ground: There should be about 10 V. A short to ground in the wire

Power Mirror Circuit Input Test

Note. Before testing, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

MICU

Scheme 90

Scheme 91

Scheme 92

1. Turn the ignition switch OFF.
2. Remove the left side kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ).
3. Disconnect driver's under-dash fuse/relay box connector P (30P).
4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 5.
5. Reconnect the connector to the driver's under-dash fuse/relay box. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 6. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained P9 WHT Power mirror switch in UP Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire P10 PNK Power mirror switch in DOWN Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire P25 GRN Power mirror switch in LEFT Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire P26 BLU Power mirror switch in RIGHT Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire P11 PUR Power mirror switch in L position Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire P22 GRY Power mirror switch in R position Measure the voltage to ground: There should be less than 1 V. Poor ground (G501) Faulty power mirror switch An open in the wire Power mirror switch released Measure the voltage to ground: There should be 5 V or more. Faulty power mirror switch A short to ground in the wire Driver's MPCS Unit
6. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
7. Disconnect driver's MPCS unit connector A (40P).
8. Inspect the connector and socket terminal to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to step 9.
9. With the connector still disconnected, make these input tests at the connector. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 10. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A5 (1) BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground (G601) Faulty power mirror switch An open in the wire A7 (1) WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40A) fuse in the under-dash fuse/relay box Blown No. 7 (10A) fuse in the driver's under-hood fuse/relay box An open in the wire A8 GRY Under all conditions Check for continuity between the A8 terminal and front passenger's MPCS unit connector A (28P) No. 4 terminal: There should be continuity. Faulty driver's under-dash fuse/relay box Faulty passenger's under-dash fuse/relay box An open in the wire A16 ORN Under all conditions Connect the A7 and A16 terminals, and A5 and A38 terminals: The left power mirror moves UP. Faulty left power mirror actuator An open in the wire A38 YEL A17 GRN Under all conditions Connect the A7 and A17 terminals, and A5 and A38 terminals: The left power mirror swings LEFT. Faulty left power mirror actuator An open in the wire A38 YEL (1) Reconnect the connector to the driver's MPCS unit. Front Passenger's MPCS Unit
10. Remove the front passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
11. Disconnect front passenger's MPCS unit connector A (28P).
12. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to step 13.
13. With the connector still disconnected, make these input tests at the connector. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 14. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A7 (1) BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground (G506) Faulty power mirror switch An open in the wire A2 (1) WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40A) fuse in the under-hood fuse/relay box Blown No. 7 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire A4 GRY Under all conditions Check for continuity between the A4 terminal and driver's MPCS unit connector A (40P) No. 8 terminal: There should be continuity. Faulty driver's under-dash fuse/relay box Faulty passenger's under-dash fuse/relay box An open in the wire A10 LT GRN Under all conditions Connect the A2 and A10 terminals, and A7 and A25 terminals: The right power mirror moves UP. Faulty right power mirror actuator An open in the wire A25 GRY A11 GRN Under all conditions Connect the A2 and A11 terminals, and A7 and A25 terminals: The left power mirror swings RIGHT. Faulty right power mirror actuator An open in the wire A25 GRY (1) Reconnect the connector to the front passenger's MPCS unit.
14. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the control unit.

Power Tilt/Telescopic Steering Control Unit Input Test

Note. Before testing, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 93

1. Turn the ignition switch OFF.
2. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), and the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), then remove the steering column covers (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ).
3. Disconnected the 16P connector (A) and 8P connector (B) from the power tilt/telescopic steering control unit (C).
4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to step 5.
5. Reconnect the connectors to the power tilt/telescopic steering control unit, and make these input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it. WIRE CAVITY CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A8 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G501) An open in the wire B1 BLK A1 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40A) fuse in the under-hood fuse/relay box Blown No.7 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire A9 YEL (1) PNK (2) Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No.21 (10A) fuse in the driver's under-dash fuse/relay box An open in the wire B3 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 23 (P/W) (50A) fuse in the under-hood fuse/relay box Blown No.26 (20A) fuse in the driver's under-dash fuse/relay box An open in the wire B5 GRN Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 23 (P/W) (50A) fuse in the under-hood fuse/relay box Blown No.25 (20A) fuse in the driver's under-dash fuse/relay box An open in the wire (1) '05 model (2) '06-08 models

Scheme 94

Scheme 95

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the memory switch (B).
3. Remove the two screws, then remove the switch from the door panel.
4. Check for continuity between the terminals in each switch position as shown (Scheme 95)
5. If the continuity is not as specified, replace the switch.

Scheme 96

Scheme 97

1. Remove the power seat adjustment switch knobs (A) and recline cover from the driver's power seat (see «FRONT SEAT DISASSEMBLY/REASSEMBLY»(/acura/rl/ii-2004-2008/remont/seats/#seats__front-seat-disassemblyreassembly) ), then remove the two screws and the power seat adjustment switch (B).
2. Disconnect the 12P connector from the power seat adjustment switch.
3. Reinstall the adjustment switch knobs to the switch.
4. Check for continuity between the terminals in each switch position as shown (Scheme 97)
5. If the continuity is not as specified, replace the switch.

Scheme 98

Scheme 99

1. Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/seats/#seats__front-seat-removalinstallation) ).
2. Disconnect the connector from each power seat motor. NOTE: All connectors are terminal side of male terminals.
3. Test each motor by connecting power and ground as shown (Scheme 99) When the motor stops running, disconnect battery power immediately.
4. If the motor does not run or fails to run smoothly, replace it: Slide motor (see «FRONT SEAT LINKAGE DISASSEMBLY/REASSEMBLY»(/acura/rl/ii-2004-2008/remont/seats/#seats) ) Front up-down motor (see «FRONT SEAT LINKAGE DISASSEMBLY/REASSEMBLY»(/acura/rl/ii-2004-2008/remont/seats/#seats) ) Rear up-down motor (see «FRONT SEAT LINKAGE DISASSEMBLY/REASSEMBLY»(/acura/rl/ii-2004-2008/remont/seats/#seats) )

Scheme 100

Scheme 101

1. Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/seats/#seats__front-seat-removalinstallation) ).
2. Disconnect the power seat wire harness 10P (or 12P)* connector from the power seat subharness. *: With ventilated seats
3. Test the motor by connecting power and ground as shown (Scheme 101) When the motor stops running, disconnect battery power immediately.
4. If the motor does not run or fails to run smoothly, check for an open in the wire between the 10P (or 12P)* connector and recline motor. If the harness is OK, replace the recline motor (see «SEAT-BACK»(/acura/rl/ii-2004-2008/remont/seats/#seats__seat-back) ).

Scheme 102

Scheme 103

1. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), and the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), then remove the steering column covers (see «STEERING COLUMN REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system__steering-column-removal-and-installation) ).
2. Disconnect the 13P connector (A) from the power tilt/telescopic steering switch (B).
3. Check for continuity between the terminals in each switch position as shown (Scheme 103)
4. If the continuity is not as specified, replace the switch.

Scheme 104

Scheme 105

Scheme 106

1. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), and the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#dashboard) ), then remove the steering column covers (see «STEERING COLUMN REMOVAL AND INSTALLATION»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system__steering-column-removal-and-installation) ).
2. Disconnect the 6P connector and 8P connector from the power tilt/telescopic steering motors.
3. Check each motor by connecting power and ground as shown ( (Scheme 105)and (Scheme 106) ). When the motor stops running, disconnect battery power immediately. TILT MOTOR TELESCOPIC MOTOR
4. If the motor does not run or fails to run smoothly; replace the motor: Tilt motor/position sensor (see «POWER TILT MOTOR/POSITION SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system) ). Telescopic motor/position sensor (see «POWER TELESCOPIC MOTOR/POSITION SENSOR REPLACEMENT»(/acura/rl/ii-2004-2008/remont/manual-power-steering/#power-steering-system-electronic-power-steering-system) ).

See also:
• TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
• GAUGE CONTROL MODULE REPLACEMENT
• MICU INPUT TEST
• DRIVER'S MPCS UNIT INPUT TEST
• POWER MIRROR SWITCH TEST/REPLACEMENT
• FRONT SEAT REMOVAL/INSTALLATION
• TRIM REMOVAL/INSTALLATION - DOOR AREAS
• FRONT DOOR PANEL REMOVAL/INSTALLATION
• DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION
• FRONT SEAT DISASSEMBLY/REASSEMBLY
• FRONT SEAT LINKAGE DISASSEMBLY/REASSEMBLY
• SEAT-BACK
• STEERING COLUMN REMOVAL AND INSTALLATION
• POWER TILT MOTOR/POSITION SENSOR REPLACEMENT
• POWER SEAT CONTROL UNIT INPUT TEST
• DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT
• SLIDE MOTOR, FRONT UP-DOWN MOTOR, REAR UP-DOWN MOTOR
• POWER TILT/TELESCOPIC STEERING CONTROL UNIT INPUT TEST