Investigation showed that the issue was in the plastic sequencing switch that is attached to the wiper motor. Replacing the motor assembly seems to have fixed the problem. To remove/replace the motor you need to do the following:
1. Remove cover caps and unbolt both front wipers.
2. Remove the flexible seal at the rear of the hood area by pulling up each plastic pin. Remove enough to get be able to remove the large black plastic cover at the rear of the engine compartment.
3. Remove left and right plastic covers on each side of the engine compartment--held in place by little plastic pins, turn with a Philips screwdriver to disengage.
4. Unscrew self tapping screws revealed under the flexible seal along the large plastic cover at the rear of the engine compartment
5. Remove the large plastic cover by removing more of the plastic pins.
6. Unbolt the wiper motor/linkage assembly
7. Release plastic catch and unhook the connector from the motor assembly
8. Unbolt the motor and gearbox from the linkage assembly.
9. Install new motor assembly
10. As the British manuals used to say "installation is the reverse of removal".
Suggest testing the new motor/linkage by hooking up the connector and trying out all wiper functions prior to bolting in place, confirming that there is rotation of the wiper attachment points.
BLS
2009 CX-9 GT