Control Unit Input Test/Replacement

NOTE: Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Turn the ignition switch to LOCK (0).
Remove the left D-pillar trim (see D-PILLAR TRIM ).
Disconnect the 20P, 14P, and 5P connectors (A) from the power tailgate control unit (B).

Fig 1: Identifying Power Tailgate Control Unit With 20P, 14P And 5P Connectors Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

With the connectors still disconnected, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If the input tests prove OK, go to step 6.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B3	ORN	Under all conditions	Connect terminal B11 to terminal B3 with a jumper wire: The power tailgate outside beeper should sound.	Blown No. 23 (10 A) fuse in the under-hood fuse/relay box Faulty power tailgate outside beeper An open or high resistance in the wire Poor ground (G503) or an open in the ground wire
B4	RED	Under all conditions	Connect terminal B11 to terminal B4 with a jumper wire: The power tailgate inside beeper should sound.	Blown No. 23 (10 A) fuse in the under-hood fuse/relay box Faulty power tailgate inside beeper An open or high resistance in the wire Poor ground (G601) or an open in the ground wire

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, replace the power tailgate control unit.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A2	BRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 1 (40 A) fuse in the auxiliary under-hood fuse/relay box An open or high resistance in the wire
B12	PNK	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 8 (20 A) fuse in the auxiliary under-hood fuse/relay box An open or high resistance in the wire
B11	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 23 (10 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
C14	YEL	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
A1	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G602) An open or high resistance in the ground wire
A4	BLK	In all ignition switch positions
B19	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground(G503) An open or high resistance in the ground wire
B8	PNK	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