7745910_085 Volvo.Penta interm housing

Note: A 678-XX diagnostic code indicates a fault in the 8 VDC circuit on the J1/P1 connector. A 3509-XX diagnostic code indicates a fault in the 5 VDC circuit on the J2/P2 connector. A 3510-XX diagnostic code indicates a fault in the 5 VDC circuit on the J1/P1 connector.The following background information is related to this procedure:The ECM supplies regulated +5 VDC to the following sensors on P2:1:
Barometric pressure sensor
Intake manifold air pressure sensor
Fuel pressure sensor
Engine oil pressure sensorThe ECM supplies regulated +5 VDC to the analog throttle position sensors (if equipped) and the aftertreatment ID module on P1:72.The ECM supplies regulated +8 VDC to the digital throttle position sensors (if equipped) on P1:56.A diagnostic code can be caused by the following conditions:
An open circuit in the harness
A short circuit in the harness
A short circuit to a voltage that is higher than 5.16 VDC
A faulty sensor
A faulty ECM
Illustration 1 g02315513
Typical example of the fuel rail pressure sensor
(1) Sensor ground
(3) 5 VDC supplyNote: The position of the terminal for the voltage supply on the fuel rail pressure sensor is different to all other engine pressure sensors.
Illustration 2 g02315514
Typical example of an engine pressure sensor
(1) 5 VDC supply
(2) Sensor groundComplete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Connector Damage
A. Turn the keyswitch to the OFF position.
B. Check the connectors and the harness for the following faults:
Damage
Abrasion
Corrosion
Incorrect attachment
C. Refer to Troubleshooting, "Electrical Connectors - Inspect".
D. Perform a 45 N (10 lb) pull test on each of the wires in the harness that are associated with the throttle position sensors. Check the wire connectors for all the sensors on the sensor supply circuits.
E. Check the screws for the ECM connectors for the correct torque of 6 N m (53 lb in).
Connector fault
Result: Found damage, abrasion, corrosion, or incorrect attachment.
Repair: Repair the connectors or the harness and/or replace the connectors or the harness.
Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.
Result: No faults found.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Use the electronic service tool in order to monitor the diagnostic codes. Wait at least 15 seconds in order for the diagnostic codes to become active. Check and record any active diagnostic codes.
Diagnostic codes
Result: One or more of the diagnostic codes listed in Table 1 is active or recently logged.
Proceed to Test Step 3.
Result: None of the previous diagnostic codes are active.
The fault may be intermittent. Proceed to Test Step 7.
3. Disconnect the Sensors One at a Time
A. Turn the keyswitch to the OFF position.
B. For a 3509-X diagnostic code, disconnect the sensors on the 5 VDC supply circuit on the J2/P2 connector one at a time. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool in order to monitor the diagnostic codes.
For a 3510-X diagnostic code, disconnect the analog throttle position sensors (if equipped) one at a time. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool in order to monitor the diagnostic codes.
For a 678-X diagnostic code, disconnect the digital throttle position sensors (if equipped) one at a time. Also, disconnect any other sensors that are connected to the 8 VDC supply on the P1 connector. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool in order to monitor the diagnostic codes.
Note: The sensor supply diagnostic will become inactive when the sensor that caused the diagnostic code is disconnected.
C. Ensure that all the sensors on the suspect sensor supply circuit are disconnected.
Diagnostic code inactive
Result: The 3509 and/or 3510 diagnostic code is inactive when all of the sensors are disconnected.
Repair: Replace the suspect sensor.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: A 3509 diagnostic code is still active.
Proceed to Test Step 4.
Result: A 3510 and/or 678 diagnostic code is still active.
Proceed to Test Step 5.
4. Disconnect the ECM Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector from the ECM.
Thoroughly inspect the P2/J2 connectors for corrosion and/or damaged seals. Repair if necessary.
C. Turn the keyswitch to the ON position.
D. Use the electronic service tool to check for active diagnostic codes.
Note: With the P2 connector disconnected, diagnostic codes will be active for all of the engine sensors. Disregard all other codes and look for a 3509-X diagnostic code only.
E. Turn the keyswitc