Honda Odyssey Service Manual: Power Tailgate Control Unit Input Test/Replacement

NOTE: All connector views are wire side of female terminals.

1. Turn the ignition switch to LOCK (0) or press the engine start/stop button to select the OFF mode.

1. Remove the left rear side trim.

3. Disconnect power tailgate control unit connectors A (5P), B (20P), and C (14P) in the order shown.




4. Inspect all 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 all connectors to the power tailgate control unit, and do the following input tests:

   • If the test indicates a problem, find and correct the cause, then recheck the system.

   • If the input test proves OK, the control unit must be faulty; replace it.

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   A1	BRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. E14 (40 A) fuse in the rear fuse box An open or high resistance in the wire
   B19	PNK	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. E1 (20 A) fuse in the rear fuse box An open or high resistance in the wire
   B20	GRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B16 (10 A) fuse in the under-hood fuse/relay box Faulty driver's under-dash fuse/relay box Faulty rear fuse box An open or high resistance in the wire
   C8	LT GRN	Ignition switch ON (II) or power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. E13 (7.5 A) fuse in the rear fuse box An open or high resistance in the wire
   A2	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G801) An open or high resistance in the ground wire
   A4	BLK
   B12	BLK
   B3	BLU	Shift lever in P position	Measure the voltage to ground: There should be less than 0.2 V.	Faulty or improperly adjusted 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 or improperly adjusted transmission range switch A short to ground in the wire

6. Reset the power tailgate control unit.