40023 17 Mercruiser WASHER

Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
1489-19 Left Turbo Turbine Outlet Temperature Sensor : Data Error The exhaust temperature module has detected a problem with the left turbocharger outlet temperature sensor. The code is logged.
The alarm output is activated.
1490-19 Right Turbo Turbine Outlet Temperature Sensor : Data Error The exhaust temperature module has detected a problem with the right turbocharger outlet temperature sensor.
1491-19 Right Turbo Turbine Inlet Temperature Sensor : Data Error The exhaust temperature module has detected a problem with the right turbocharger inlet temperature sensor.
1492-19 Left Turbo Turbine Inlet Temperature Sensor : Data Error The exhaust temperature module has detected a problem with the left turbocharger inlet temperature sensor.
2857-9 Exhaust Temperature Module abnormal update rate The ECM has not received several messages that were expected from the exhaust temperature monitor over the CAN data link. The code is logged.
The alarm output is activated.
1531-19 Engine Cylinder #1 Exhaust Port Temperature Sensor : Data Error
1532-19 Engine Cylinder #2 Exhaust Port Temperature Sensor : Data Error
1533-19 Engine Cylinder #3 Exhaust Port Temperature Sensor : Data Error
1534-19 Engine Cylinder #4 Exhaust Port Temperature Sensor : Data Error
1535-19 Engine Cylinder #5 Exhaust Port Temperature Sensor : Data Error
1536-19 Engine Cylinder #6 Exhaust Port Temperature Sensor : Data Error
1537-19 Engine Cylinder #7 Exhaust Port Temperature Sensor : Data Error
1538-19 Engine Cylinder #8 Exhaust Port Temperature Sensor : Data Error
1539-19 Engine Cylinder #9 Exhaust Port Temperature Sensor : Data Error
1540-19 Engine Cylinder #10 Exhaust Port Temperature Sensor : Data Error
1541-19 Engine Cylinder #11 Exhaust Port Temperature Sensor : Data Error
1542-19 Engine Cylinder #12 Exhaust Port Temperature Sensor : Data Error
1543-19 Engine Cylinder #13 Exhaust Port Temperature Sensor : Data Error
1544-19 Engine Cylinder #14 Exhaust Port Temperature Sensor : Data Error
1545-19 Engine Cylinder #15 Exhaust Port Temperature Sensor : Data Error
1546-19 Engine Cylinder #16 Exhaust Port Temperature Sensor : Data Error The exhaust temperature monitor has detected a problem with the applicable exhaust temperature sensor. The code is logged.
The alarm output is activated.
Illustration 1 g01784693
Exhaust temperature module
The exhaust temperature module is an electronic monitoring system used to monitor exhaust temperatures. The module monitors the following thermocouples:
Thermocouples for each cylinder exhaust port
Thermocouples at the inlet of each turbocharger
Thermocouples at the outlet of each turbochargerThe module will display each of these temperatures. The exhaust temperature module sends this information via the CAN data link to the Electronic Control Module (ECM) and the optional remote control panel. The exhaust temperature module has two switches that can be wired to alarms or to relays. Refer to Systems Operation/Testing and Adjusting, KENR5473, "Exhaust Temperature Module" for additional information.If the ECM cannot communicate with the exhaust temperature module, the ECM activates a diagnostic code related to identify the problem. The most likely cause of the diagnostic code is a problem with an electrical connector or a harness. The next likely cause is a problem with the exhaust temperature module. The least likely cause is a problem with the ECM.Terminating resistors must be connected to each end of the CAN data link. The terminating resistors improve the communication between the devices. If there is an intermittent diagnostic code for any of the devices connected to the CAN data link, check the terminating resistors. One of the terminating resistors is connected to a splice in the wiring harness near the J1/P1 ECM connector. The other terminating resistor is connected to a tee inside the remote panel. If the engine is not equipped with a remote panel, the other terminating resistor will be connected at the far end of interconnect harness. Refer to the appropriate documentation for the site in order to determine the location of this resistor.This troubleshooting procedure may generate additional diagnostic codes. Correct the cause of the original diagnostic code before continuing. You clear the diagnostic codes after the problem is resolved.
Illustration 2 g02148037
Schematic for the circuit of the exhaust temperature module
Illustration 3 g01779914
Location of the components for the exhaust temperature module
(1) ECM junction box
(2) Exhaust temperature module Test Step 1. Inspect the Electrical Connectors and the Wiring
Set the engine control switch to the OFF/RESET position. Remove the electrical power from the engine.
Illustration 4 g01779933
Locations of the connectors for the CAN data link at the ECM junction box (typical left side engine view)
(3) J1/P1 ECM
(4) Control harness connectors
Thoroughly inspect the condition of connectors for exhaust temperature module (2). Also, thoroughly inspect the condition of ECM connectors (3) and control harness connectors (4). Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 5 g01391850
Terminal locations at the P1 ECM connectors for the CAN data link
(34) CAN data link −
(42) Shield
(50) CAN data link +
Illustration 6 g01737613
Terminal locations at the control harness connector that are for the CAN data link
(Terminal h) CAN shield
(Terminal i) CAN data link +
(Terminal j) CAN data link −