Understanding VSI Controller Diagnostics Codes (cont.)
3.3 Three Bars - Left Motor Wiring Trip
The left hand motor has a short circuit to a battery connection.
Test Left Motor Short
Check that the batteries are fully charged and in good con- dition; and check all cables and connections. Check the connections to the left motor, look for a loose or damaged connector. Take a resistance reading from pin 3 to pin 9 and pin 3 to pin 7 or pin 8, see (figure A3.3.1) and (A3.3.2), if the all the circuits are open (resistance is greater than 10 K ohm), then replace the controller. If the reading is short (resistance is less than 10 K ohm), proceed to check the
A3.3.1
A3.3.2
If the all the circuits are open (resistance is greater than 10 K ohm), then replace the controller.
Measure the resistance from the bottom contact of the red thick wire on the
Test 1
A3.3.3
Test 2
Test 3 |
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If all of the readings are open, then replace the main harness. 
If any of the readings are short, then replace the left motor.
SUNRISE MEDICAL | ASPIRE SERVICE MANUAL | 2003 | PAGE 6 |