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.
