COOLING AR-HIGH AMBIENT TEMP 1442217 - Caterpillar

    Engine Starter Motor Relay : Current Above Normal     The ECM detects the following conditions:
A high current condition (short circuit) in the circuit for the starting motor relay for at least one second.
The ECM has been powered for at least one second.    The following background information is related to this procedure:When the control panel sends a start signal to the engine ECM, pin P1:43 energizes the starter relay. The return from the relay is to pin P1:51.The starting motor relay supplies battery power to the relay solenoids in the starting motor. This internal relay provides high current battery voltage to the starting motor.
Illustration 1 g03593097
Schematic of the circuit for the starting motor
Illustration 2 g03593140
View of the pin locations on the P1