SPACER 5P9865 - Caterpillar

Note: There are three models of the Marine Power Display. Marine Power Display (MPD), Mini Marine Power Display (Mini MPD) and Color Marine Power Display (Color MPD). All three displays share the same J1939 wiring for the communication of data and power requirements. The Color MPD has the capability of accessing both Electronic Control Modules (ECM). Refer to Installation Guide, "Connecting the Color MPD" for dual ECM wiring.Note: The Marine Power Display (MPD) has a polarized lens. If the person that is viewing the MPD is wearing glasses with lenses that are polarized, the screen will appear to have black spots on the LCD. This is a normal condition. MPD in this section refers to all three types of Marine Power Displays.Note: If the MPD does not receive a message for a particular gauge, the gauge display will be automatically removed from the screen.Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the "OFF" position.
Check the ECM connectors, the customer connector, and wiring for damage or incorrect attachment.
Check for the correct installation of the wires for the J1939 data link. Refer to Installation Guide, "J1939 Data Link Wiring " for installation information.
Check the following components for abrasion, corrosion, or incorrect attachment.
MPD
WiringEnsure that the 163-3973 Cable is securely connected to the Marine Power Display (MPD).
Verify that each individual Electronic Control Module (ECM) is programmed to the proper engine location.
Verify that the −Battery connections are secure and free from corrosion.
Verify that the belts and all connections for the charging system are secure and tight. Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and connectors appear to be in good repair. Proceed to Test Step 2.
Not OK - A problem with the harness and/or the connectors has been found.Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Verify Proper Installation or the Data Link
Verify that the terminating resistors are installed on both ends of the data link.
Disconnect the J1 ECM connector and measure the resistance between the connection for the J1939 Data Link + and the connection for the J1939 Data Link −. Refer to Table 1 for the terminal locations for your engine.
Table 1
Terminal locations for the Data Link on the J1 ECM Connector
Engine J1939 Data Link + J1939 Data Link − Shield
3126B
3500B Series II
C7
C9
C12
C15
C18 J1-50 J1-34 J1-42
3176C
3196
3406E J1-33 J1-39 J1-26
3412E
3500B
C30
C32 J1-16 J1-10 J1-15 Expected Result:The correct resistance is 57 Ohms to 63 Ohms.Results:
OK - Proceed to Test Step 3.
Not OK - The measurement is 114 Ohms to 126 Ohms. A terminating resistor is missing.Repair: Install the missing resistor.Refer to the Schematic in order to determine the location of the missing resistor.Proceed to Test Step 3.
Not OK - Resistance