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 ).

Turn the ignition switch OFF.
Remove the driver's seat (see FRONT SEAT REMOVAL/INSTALLATION ).
NOTE: Be careful not to scratch the interior trim.
Disconnect the 40P connector (A) and 18P connector (B) from the power seat control unit (C).

Fig 1: Identifying 40P Connector, 18P Connector And Power Seat Control Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

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

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
A31	BLK/BLU	Shift lever out of P position	Measure the voltage to ground: There should be about 10 V.	A short to ground in the wire

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Power Seat Control Unit Input Test