2010 Acura Truck MDX V6-3.7L Page 234

6. Disconnect power seat control unit connector A (40P).

7. Disconnect the power seat adjustment switch 12P connector.

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.?

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: Body and Frame/Seats/Power Seat Switch/Service and Repair/Power Seat Adjustment Switch

Test/Replacement.

Is the switch OK?

YES -

Replace the power seat control unit.?

2010 Acura Truck MDX V6-3.7L Page 229

6. Disconnect power seat control unit connector A (40P).

7. Disconnect power tilt/telescopic steering control unit connector A (16P).

8. Check for continuity between power seat control unit connector A (40P) terminal No. 39 and power tilt/telescopic steering 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 steering control unit and recheck. If DTC B1843 is still indicated, replace the power seat control

unit.?

10. Turn the ignition switch to LOCK (0).

11. Disconnect power tilt/telescopic steering control unit connectors A (16P) and B (8P).

12. Turn the ignition switch to 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.