5006598 JOHNSON Service Manual - English

Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
444-5 Starter Motor Relay current below normal The Electronic Control Module (ECM) detects an open circuit and/or a short to the +Battery in the start relay. The ECM can only detect this condition when the start relay is not energized. The code is logged.
444-6 Starter Motor Relay current above normal The ECM detects a short circuit to ground in the start relay. The ECM can only detect this condition when the start relay is energized. The ECM has the ability to crank the engine when the Engine Control Switch (ECS) is placed in the START position. After the ECS is placed in the START position, the ECM will begin the prelube cycle. The ECM will send an engine start signal to terminal BH of the customer connector after the prelube cycle is complete. The customer's engine start signal will return on terminal BJ of the customer connector. The signal is then sent to terminal f of the A-C90/P-C1 connector on the power distribution panel.The crank cycle will continue for the cycle crank time that has been programmed or the crank cycle will continue until the engine speed reaches the crank terminate speed.This process will repeat for a programmed amount of times "Total Number of Crank Cycles". If the engine does not start, Caterpillar Electronic Technician (ET) will display "OVERCRANK". The engine control will be in an idle state. The process can be restarted by turning the ECS to the OFF/RESET position. Next, turn the ECS to the STOP position. Then turn the ECS to the START position.The engine can be manually started by using the "crank override switch" which is located on the inside of the instrument panel.
Illustration 1 g01328451
Typical example
Illustration 2 g01242365
P2 ECM connector
(P2-6) Starter drive (+)
(P2-7) Return (-)
Illustration 3 g01328549
Customer connector
(Terminal BH) Start signal from ECM
(Terminal BJ) Start signal from customer
Illustration 4 g01328550
Terminal locations for the P-C1/A-C90 connector for the power distribution panel
(Terminal d) Override to starting motor switches
(Terminal f) Customer's start signal to starting motor switches
Illustration 5 g01328551
Terminal locations for the following connectors P-C2/A-C91 connector for the power distribution panel, A-C2/J-C2 RH rigid harness connectors and C-C2/J-C1 LH rigid harness connectors
(Terminal L) +Battery to the control panel
(Terminal O) Power to starting motor #1
(Terminal R) Power to starting motor #2
Illustration 6 g01328552
Terminal locations for the A-C92/F-C1 RH rigid harness connectors and the connectors G-C6/F-C2 for a RH control panel
(Terminal 13) Override to starting motor switches
(Terminal 16) +Battery to crank override switch
Illustration 7 g01328594
Terminal locations for the A-C2/J-C2 RH rigid harness connectors and the C-C2/J-C1 LH rigid harness connectors
(Terminal d) Override to right hand air start solenoid
(Terminal e) Return for the right hand air start solenoid
Illustration 8 g01328876
Terminal locations for the A-C1/E-C2 RH rigid harness connectors and the E-C1/C-C1 LH rigid harness connectors
(Terminal E) Start signal from customer
Illustration 9 g01320528
Connector locations
(1) A-C1/E-C2 RH rigid harness connectors
(2) A-C2/J-C2 RH rigid harness connectors
(3) P-C1/A-C90 Connectors for the power distribution panel
(4) P-C2/A-C91 Connectors for the power distribution panel
(5) G-C6/F-C2/F-C1/A-C92 Connectors for a RH Control panel
(6) C-C22 Primary ECM connector P2
(7) C-C15 Primary ECM connector P1
(8) C-C28 Secondary ECM connector P2
(9) C-C29 Secondary ECM connector P1
(10) G-C6/F-C2/F-C1/C-C17 Connectors for a LH Control panel
(11) C-C18/TB-C1 Customer connectors
(12) C-C2/J-C1 LH rigid harness connectors
(13) C-C1/E-C1 LH rigid harness connectors
Illustration 10 g01234146