Power Seat Control Unit Input Test/Replacement

1. Turn the ignition switch to LOCK (0).
2. Remove the driver's seat (see FRONT SEAT REMOVAL/INSTALLATION ).
   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).
   Fig 1: Identifying Power Seat Control Unit 40P And 18P Connector Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 seat control unit, and do the following input tests:
   • 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.
   TEST CONDITION REFERENCE CHART
   
   

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   B34	BLK/YEL	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 2 (7.5 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire
   B36	BLU	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15(10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
   A1	PNK	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box Blown No. 21 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire
   A8	LT BLU	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box Blown No. 19 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire
   B9	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground(G701) An open or high resistance in the ground wire
   A4	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground(G701) An open or high resistance in the ground wire
   A18	BLK [BLK/WHT]	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground(G701) An open or high resistance in the ground wire
   B26 (A/T)	BLK/BLU	Shift lever in P position	Measure the voltage to ground: There should be less than 0.2 V.	Faulty transmission range switch Poor ground(G101) or an open in the ground wire An open or high resistance in the wire
   		Shift lever in any other position than P	Measure the voltage to ground: There should be about 5 V.	Faulty transmission range switch A short to ground in the wire
   B26 (M/T)	BLK/BLU	Parking brake switch ON (Level pulled)	Measure the voltage to ground: There should be less than 0.2 V.	Faulty Parking brake switch An open or high resistance in the wire
   		Parking brake switch OFF (Lever released)	Measure the voltage to ground: There should be about 5 V.	Faulty Parking brake switch A short to ground in the wire
   B15	PUR [WHT/BLK]	Run the power seat motors	Measure the voltage to ground: There should be at least about 10 V.	Faulty position sensor A short to ground in the wire
   B10 . B29	GRN [BLU/WHT] . WHT [GRN/BLK]	Run the recline motor	Measure the voltage between terminals B10 (+) and B29 (-): There should be about 2.5 V average.	Faulty position sensor An open or high resistance in the wire A short to ground in the wire
   B11 . B29	BRN [YEL/BLK] . WHT [GRN/BLK]	Run the slide motor	Measure the voltage between terminals B11 (+) and B29 (-): There should be about 2.5 V average.	Faulty position sensor An open or high resistance in the wire A short to ground in the wire
   B12 . B29	PNK [BLU/BLK] . WHT [GRN/BLK]	Run the front up-down motor	Measure the voltage between terminals B12 (+) and B29 (-): There should be about 2.5 V average.	Faulty position sensor An open or high resistance in the wire A short to ground in the wire
   B13 . B29	YEL [GRN/WHT] . WHT [GRN/BLK]	Run the rear up-down motor	Measure the voltage between terminals B13 (+) and B29 (-): There should be about 2.5 V average.	Faulty position sensor An open or high resistance in the wire A short to ground in the wire
   B1 . B7	LT BLU [BLK/BRN] . BLU	Slide switch in FORWARD position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B24	LT BLU [BLK/BRN] . BRN	Slide switch in BACKWARD position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B6	LT BLU [BLK/BRN] . GRY	Recline switch in FORWARD position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B23	LT BLU [BLK/BRN] . RED	Recline switch in BACKWARD position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B5	LT BLU [BLK/BRN] . LT GRN	Front up-down switch in UP position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B4	LT BLU [BLK/BRN] . WHT	Front up-down switch in DOWN position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B22	LT BLU [BLK/BRN] . BLU	Rear up-down switch in UP position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire
   B1 . B3	LT BLU [BLK/BRN] . ORN	Rear up-down switch in DOWN position	Measure the voltage between the terminals: There should be less then 0.2 V.	Faulty driver's power seat adjustment switch An open or high resistance in the wire

   []: 2-door

6. Turn the ignition switch to LOCK (0), then
7. disconnect the connectors from the power seat control unit, and do the following input tests:

• 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.

[]: 2-door