950043 Volvo.Penta Cross recessed screw

Table 1
Diagnostic Codes
CDL Code and Description Comment
254-9
Electronic Control Module : Abnormal Update Rate The ECM is not responding correctly. The code is logged.
1042-9
ITSM : Abnormal Update Rate The Electronic Control Module (ECM) has not received the last ten messages that were expected from the ITSM over the Cat Data Link.
The code is logged. The alarm output is activated.
1440-9
Throttle Actuator : Abnormal Update Rate The Electronic Control Module (ECM) has lost the last four messages that were expected from the throttle actuator over the CAN data link.
The code is logged. The alarm output is activated. The shutdown output is activated. The engine is shut down.
1446-9
Fuel Metering Module : Abnormal Update Rate The ECM has not received the last ten messages that were expected from the fuel metering valve over the CAN data link.
The code is logged. The alarm output is activated.
1720-9
Turbocharger Compressor Bypass Valve Actuator : Abnormal Update Rate The Electronic Control Module (ECM) has lost the last four messages that were expected from the compressor bypass actuator over the CAN data link.
The code is logged. The alarm output is activated. The shutdown output is activated. The engine is shut down.
6367-9
Fuel Metering Module #1 : Abnormal Update Rate The code is logged. The alarm output is activated.
6368-9
Fuel Metering Module #2 : Abnormal Update Rate The code is logged. The alarm output is activated.
Illustration 1 g01327561
Schematic of the Cat Data Link
The engine is not equipped with an ASM.
Illustration 2 g01324993
Schematic of the Cat Data Link
The engine is equipped with an ASM.
Test Step 1. RECOMMENDED ACTIONSPerform the following troubleshooting procedure.
Table 2
Troubleshooting Test Step Value Result
1. Inspect the Electrical Connectors and Wiring.
A. Remove the electrical power from the engine.
B. Thoroughly inspect each of the following connectors:
- J1/P1 connectors
- J3/P3 connectors
- J5/P5, J6/P6, and J9/P9 connectors
- 14-pin connectors for the Integrated Temperature Sensing Module
C. Check the torque of the allen head screw for the ECM connectors. refer to Troubleshooting, "ECM - Replace" for the correct torque value.
D. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the data link.
E. Check the harnesses and wiring for abrasion and for pinch points.
Electrical Connectors and Wiring
Result: The connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.
Proceed to Test Step 2.
Result: The components are not in good condition and/or at least one connection is improper.
Repair: Repair or replace the electrical connectors and/or wiring as necessary
2. Check the Cat Data Link
A. Connect Cat ET to the service tool connector.
B. Restore the electrical power to the engine. Set the engine control to the STOP mode.
C. Select the "File/Select ECM" menu on the Cat ET. Verify that all the modules are displayed on the "ECM Selector" screen.
D. Verify that the following diagnostic codes are not activated.
- 590-9 Engine Control Module abnormal update rate
- 1042-9 ITSM abnormal update rate
E. If Cat ET displays "Duplicate Type on data link. Unable to Service", there may be a problem with the harness inside the terminal box. Check the continuity between the following terminals:
- P3-60 and P3-68
F. Verify that the jumper wire is in good condition. Make repairs, as needed.
Cat Data Link
Result: All the modules are displayed on the "ECM Selector" screen. There are no active diagnostic codes for the data link. The problem seems to be resolved.
Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Symptom Troubleshooting".
If any of the above codes are logged and the engine is running properly, there may be an intermittent problem in a connector or a wiring harness. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Result: At least one of the modules is not displayed on the "ECM Selector" screen. There may be an active diagnostic code for the data link.
Repair: Proceed to Test Step 3.
3. Check the Wiring for the Data Link.
A. Remove the electrical power from the engine.
B. Disconnect Cat ET from the service tool connector.
C. Disconnect the following connectors:
- P1 connector from the ECM
- P3 connector from the ASM
- Customer connector P6
- 14-pin connector from the ITSM
C. Measure the resistance between the points that are listed below. During each measurement, wiggle the wires in the harness to check for an intermittent problem. Be sure to wiggle the wires near each of the connectors.
- P1-8 to Service tool connector Terminal D
- P1-8 to P3-8
- P1-8 to P6-7
- P1-8 to Terminal J of the 14-pin connector on the ITSM
- P3-8 to Service tool connector Terminal D
- P1-9 to P3-9
- P1-9 to Service tool connector Terminal E
- P1-9 to J6-17
- P1-9 to Terminal N of the 14–pin connector on the ITSM
- P3-9 to Service tool connector Terminal E
- P1-8 to Ground strap for the ECM
- P1-9 to Ground strap for the ECM
Each check of the resistance between the connectors is less than 5 Ohms.
Each check of the resistance between the connector and the ground strap is greater than 20,000 Ohms.
Cat Data Link
Result: Each check of the resistance for the data link is within the specification. The wiring for the data link appears to be OK.
Repair: Use the following procedure:
1. Connect all electrical connectors.
2. Connect Cat ET to the service tool connector.
3. Verify that Cat ET is able to communicate with each of the modules.
4. If Cat ET is unable to communicate with a module, there may be a problem with the supply voltage to the module. Refer to Troubleshooting, "Electrical Power Supply - Test".
5. If the problem is not resolved, there may be a problem with the wiring for the data link between the J6 connector and the Electronic Modular Control Panel (EMCP II+). Verify that the wiring is okay.
6. If the problem is not resolved, there may be a problem with the module that is not communicating with Cat ET.
Note: It is unlikely that a module has failed. Exit this procedure and perform this procedure again. If the problem is not resolved, temporarily replace the module that is not communicating. Refer to Troubleshooting, "ECM - Replace" or Troubleshooting, "Control