Battery Voltage Too High
electrical
Description
Battery voltage too high means main microprocessor voltage is greater than 17 VDC, and the unit shuts down and alarms.
Activation Conditions
Battery voltage at the main microprocessor is greater than 17 VDC.
Unit Behavior
Shutdown and alarm.
Reset Conditions
Auto reset after 15 minutes when the voltage at the main microprocessor is between 11 and 14 VDC, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check Battery Voltage a. Test voltage at battery with unit off. Must be between 11-16 VDC. b. Test voltage at battery with unit running. Must be between 12-16 VDC. NOTE Voltage with unit running should always be higher than voltage with unit off due to battery charging. 2. Check Alternator Voltage a. Test voltage at PCM-T3 with unit off. Must be between 11-16 VDC. b. Test voltage at PCM-T3 with unit running. Must be between 12-16 VDC. 3. Check Voltage At Main Microprocessor a. Check voltage reading at 3MM-23 and 3MM-34. Must be between 11-16 VDC. b. Check Unit Data voltage reading. Must be within 0.5 VDC of reading obtained at 3MM-23 and 3MM- 34.