Control Unit Input Test/Replacement
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- All connector views are wire side of female terminals.
- Turn the ignition switch to LOCK (0).
- Remove the left rear side trim panel (see TRIM REMOVAL/INSTALLATION - REAR SIDE AREA ).
- Disconnect power tailgate control unit connectors A (5P), B (20P), and C (14P) in the order shown.
- 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.
- 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.NOTE: After replacing the power tailgate control unit, reset the power tailgate control unit (see Resetting the Power Tailgate Control Unit ).CONTROL UNIT INPUT TEST REFERENCE CHART
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 WHT 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) 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 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 GRY B12 BLK B3 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
B13 LT GRN Under all conditions, disconnect power tailgate control unit connector B (20P) Check for continuity to ground:
There should be no continuity.- Poor ground (G801) or an open in the ground wire
- An open or high resistance in the wire
B16 WHT Ignition switch ON (II), and while the tailgate is opened or closed manually Measure the voltage between terminals B16 and B12:
An analog meter should alternate between 0 V and about 5 V (a digital voltmeter should read about 2.5 V while the tailgate moves).- Faulty power tailgate sensor
- An open or high resistance in the wire
- A short to ground in the wire
B17 ORN Ignition switch ON (II), and while the tailgate is opened or closed manually Measure the voltage between terminals B17 and B12:
An analog meter should alternate between 0 V and about 5 V (a digital voltmeter should read about 2.5 V while the tailgate moves).- Faulty power tailgate sensor
- An open or high resistance in the wire
- A short to ground in the wire
C9 PUR Ignition switch ON (II) Measure the voltage to ground:
There should be about 5 V.- Faulty power tailgate sensor
- A short to ground in the wire
- Reset the power tailgate control unit (see RESETTING THE POWER TAILGATE CONTROL UNIT ).