TURBO GP-BASIC 20R3161 - Caterpillar

Power Distribution System
The power distribution system includes the following components:
Interface harnesses
Power distribution panels
Fuses
Circuit breakers
Relays
SwitchesThe components that are listed are serviceable at the lowest component level.Interface Harnesses
Illustration 1 g02527560
Components of the power distribution circuits (right side engine view)
(1) Control box connectors for the interface harness to the low current power distribution panel and the high current power distribution panel
(2) Control box
(3) Low current power distribution panel
(4) High current power distribution panel Interface harnesses are used to route the power from the power distribution panels to the control box and other electrical or electronic components.Low Current Power Distribution Panel
Illustration 2 g02528017
Locations of the circuit breakers, relays, and connections that are in the low current power distribution panel
(5) 20 Amp breaker for the primary ECM
(6) Power relay for the primary ECM circuit
(7) Power relay for the secondary ECM circuit
(8) 20 Amp breaker for the secondary ECM
(9) 20 Amp breaker for the #1 auxiliary power circuit to the Engine Interface Connector (EIC)
(10) 20 Amp breaker for the #2 auxiliary power circuit to the Engine Interface Connector (EIC)
(11) 20 Amp breaker (unused)
(12) 6 Amp breaker for the Aftercooler Temperature Control Module (ATCM)
(13) 6 Amp breaker for the Temperature Control Module (TCM)
(14) 6 Amp breaker for the keyswitch circuit for the secondary ECM
(15) 10 Amp circuit breaker for the override control relays
(16) 6 Amp circuit breaker for the digital return (No. 2)
(17) 6 Amp breaker for the keyswitch circuit for the primary ECM
(18) 6 Amp circuit breaker for the digital return (No. 1)
(19) Connections for the secondary keyswitch relay
(20) Connections for the primary keyswitch relay
(21) Primary power distribution block
(22) Secondary power distribution block The low current power distribution panel is used to accommodate the fuses, the circuit breakers, and the relays. The low current panel is for electrical components that draw less than 25 A of current.High Current Power Distribution Panel
Illustration 3 g03671061
Locations of the circuit breakers and switches that are at the high current power distribution panel
(23) 40 Amp circuit breaker for the main power (primary)
(24) 40 Amp circuit breaker for the main power (secondary)
(25) Secondary starting motor magnetic switch (optional)
(26) 30 Amp circuit breaker for the prelube pump (optional)
(27) 40 Amp circuit breaker for the starting system (optional)
(28) Primary starting motor magnetic switch (optional) The high current power distribution panel is used to accommodate the circuit breakers, the relays, and the switches. The high current panel is for electrical components that draw current that is equal to or greater than 25 A.Controllers
Illustration 4 g02533757
Diagram of the Engine Management System (EMS) on P6L1-01030
(1) Secondary engine ECM
(2) Control assembly
(3) Primary engine ECM
(4)