Door Multiplex Control Unit Input Test

Turn the ignition switch to LOCK (0)
Remove the power window master switch (see REAR POWER WINDOW SWITCH TEST )
NOTE: Be careful not to scratch the door trim
Disconnect the 37P connector (A) from the power window master switch (B)

Fig 1: Identifying Door Multiplex Control Unit 37P Connector
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

Reconnect the connector to the power window master switch, and do these input tests at the following 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 6

CONNECTOR WIRE REFERENCE CHART

Cavity	Wire	Test condition	Test Desired result	Possible cause if desired result is not obtained
32	BLK	Under all conditions	Measure the voltage to ground There should be less than 0 5V	Poor ground (G501) An open in the wire
37	BLK	Under all conditions	Measure the voltage to ground There should be less than 0 5V	Poor ground (G502) An open in the wire
13	WHT	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 in the wire
14	LT GRN	Ignition switch ON (II)	Measure the voltage to ground There should be battery voltage	Blown No 16 (7 5 A) fuse in the driver's under-dash fuse/relay box An open in the wire
25	WHT	Under all conditions	Measure the voltage to ground There should be battery voltage	Blown No 3-4 (DR F/B) (60 A) fuse in the under-hood fuse/relay box Blown No 24 (20 A) fuse in the driver's under-dash fuse/relay box An open in the wire
16	RED	Ignition switch ON (II), position 2 switch pressed	Measure the voltage to ground There should be less than 1 V	Poor ground (G501) Faulty driving position memory switch An open in the wire
16	RED	Ignition switch ON (II), position 2 switch released	Measure the voltage to ground There should be about 5 V	Faulty driving position memory switch A short to ground in the wire
17	GRY	Ignition switch ON (II), position 1 switch pressed	Measure the voltage to ground There should be less than 1 V	Poor ground (G501) Faulty driving position memory switch An open in the wire
17	GRY	Ignition switch ON (II), position 1 switch released	Measure the voltage to ground There should be about 5 V	Faulty driving position memory switch A short to ground in the wire
19	YEL	Ignition switch ON (II), SET switch pressed	Measure the voltage to ground There should be less than 1 V	Poor ground (G501) Faulty driving position memory switch An open in the wire
19	YEL	Ignition switch ON (II), SET switch released	Measure the voltage to ground There should be about 5 V	Faulty driving position memory switch A short to ground in the wire

Turn the ignition switch to LOCK (0), then disconnect the connector from the power window master switch, and do these input tests at the following connector

If any test indicates a problem, find and correct the cause, then recheck the system
If all the input tests prove OK, the door multiplex control unit must be faulty, replace the power window master switch

NOTE: After replacing the power window master switch, reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT )

CONNECTOR WIRE REFERENCE CHART

Cavity	Wire	Test condition	Test Desired result	Possible cause if desired result is not obtained
4	GRN	Under all conditions	Connect terminals No 25 and No 4 The driving position memory switch indicator 2 should come on	Faulty driving position memory switch Faulty LED Poor ground (G501) An open in the wire
6	PUR	Under all conditions	Connect terminals No 25 and No 6 The driving position memory switch indicator 1 should come on	Faulty driving position memory switch Faulty LED Poor ground (G501) An open in the wire
26	PNK	Ignition switch ON (II)	Connect terminals No Hand No 26 The driving position memory switch lights should come on	Faulty driving position memory switch Faulty LED Poor ground (G501) An open in the wire
33	BLU	Under all conditions (disconnect the power seat control unit connector A (40P))	Check for continuity between terminal No 33 and power seat control unit connector A (40P) terminal No 39 There should be continuity	An open in the wire
35	PNK	Under all conditions (disconnect the power seat control unit connector A (40P))	Check for continuity between terminal No 35 and power seat control unit connector A (40P) terminal No 40 There should be continuity	An open in the wire