MODULE GP-INTERFACE 3118777 - Caterpillar

The EMCP monitors the battery supply voltage based on the +BATT and –BATT voltage inputs to the EMCP control. If the battery voltage rises above the "High Battery Voltage Event Threshold" set point value, the high battery voltage event timer will begin timing. When the high battery voltage timer expires, the high battery voltage event is made active. The battery voltage must be above the event threshold level continuously while timing. If the battery voltage drops below the high battery voltage warning threshold, the high battery voltage event will be made inactive. The timer will be reset. If a battery over voltage condition is detected, "HIGH BATTERY VOLTAGE SHUTDOWN" or "HIGH BATTERY VOLTAGE " will be displayed on the EMCP. The message is to inform the operator of a high battery voltage condition.If the battery voltage drops below the "Low Battery Voltage Warning" threshold set point value, the low battery voltage event timer will begin timing. When the low battery voltage event timer expires, the low battery voltage event is made active. The battery voltage must be below the event threshold level continuously while timing. If the battery voltage rises above the low battery voltage event threshold, the low battery voltage event will be made inactive. The timer will be reset.If a battery under voltage condition is detected, a "LOW BATTERY CHARGING SYS VOLT WARN" or "LOW BATTERY VOLTAGE " will be displayed on the EMCP. The message is to inform the operator of an under voltage condition.If the battery voltage drops below the "Low Battery Cranking Voltage Warning" threshold set point value, the low battery cranking voltage event timer will begin timing. When the low battery cranking voltage event timer expires, the low battery cranking voltage event is made active.Note: The timer will time out only if the battery voltage has been below the event threshold level continuously while timing. If the battery voltage rises above the low battery cranking voltage event threshold, the low battery voltage event will be made inactive. The timer will be reset.If a battery under voltage condition is detected during cranking, the "LOW BATT CRANKING VOLTAGE WARN" or "LOW BATTERY CRANKING VOLTAGE " will be displayed on the EMCP. The message is used to inform the operator of an under voltage condition.Note: The severity of the battery over/under voltage condition will determine if a warning or shutdown event occurs.Conditions Which Generate This Code:The code is generated when the measured battery voltage value goes above or below the programmed thresholds for a duration that has been configured.Test Step 1. PERFORM THE INITIAL CHECK
The battery and charging system are located on the engine. Use the Caterpillar Electronic Technician (Cat ET) in order to check for active diagnostic codes on the engine ECM. If any codes are present, correct the engine diagnostic codes first. Expected Result:No other diagnostic codes or indicators are active on the package ECM modules.Results:
OK - No other diagnostic codes or indicators are active. Proceed to test step Test Step 2.
NOT OK