Control Unit Input Test/Replacement
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before testing the power tailgate control unit, 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 rear pillar trim (see TRIM REMOVAL/INSTALLATION - REAR SIDE AREA ).
- Disconnect power tailgate control unit connectors A (5P), B (20P), and C (14P).
- 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, make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input tests prove OK, go to step 5.WIRE CAVITY CHART
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained B3 RED Under all conditions Connect B10 and B3 terminals with a jumper wire:
The beeper should sound.- Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- Faulty beeper
- Poor ground(G701)
- An open in the wire
- Reconnect all connectors to the power tailgate control unit, and make these input tests at the appropriate connector.
- 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.WIRE CAVITY CHART
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. 11 (40 A) fuse in the rear fuse/relay box
- An open in the wire
B12 PNK Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 6 (20 A) fuse in the rear fuse/relay box
- Blown No. 3 (60 A) fuse in the under-hood fuse/relay box
- An open in the wire
B10 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
- An open in the wire
C14 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
A1 BRN Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.- Poor ground(G701)
- An open in the wire
A4 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.- Poor ground(G701, G702)
- An open in the wire
B19 B8 GRN Shift lever in P position Measure the voltage to ground:
There should be less than 1 V.- Faulty transmission range switch
- Poor ground (G101, G102)
- An open in the wire
- Reset the power tailgate control unit (see RESETTING THE POWER TAILGATE CONTROL UNIT ).