956554 Volvo.Penta Screw

Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
1627-5 Reserved for Certification agency ID : Current Below Normal The engine Electronic Control Module (ECM) detects an open circuit at the fuel pump relay for 60 seconds.
The ECM detects a short to battery voltage for the fuel pump relay for 60 seconds.
The ECM can only detect this condition when the output driver is not activated. The code is logged.
1627-6 Reserved for Certification agency ID : Current Above Normal The engine ECM detects a short circuit for the fuel pump relay.
The ECM can only detect this condition when the output driver is activated. The ECM is able to energize the fuel pump relay. The fuel pump relay controls battery power to the fuel priming pump. The circuit that is for battery power uses a 10 amp fuse for circuit protection. This circuit also provides battery power to the power module that is for the fuel control valve controller.Manually Priming the Fuel SystemA manual switch can be used to prime the fuel system. This switch is used after maintenance has been performed on the fuel system allowing air to be purged from the system without opening up fuel lines. The switch is located near the high-pressure fuel pump on the right side of the engine.When the switch is activated, the ECM powers the electric fuel priming pump. The ECM will command the throttle position for the fuel control valve to 25 percent providing a path for the air. To use this feature, the keyswitch must be in the ON position. Also, the engine speed must be 0 rpm.The switch for the fuel priming pump is a normally open switch.
Illustration 1 g03280598
Typical schematic for the fuel priming pump
Illustration 2 g03282638
Location of the ECM connectors for the 16 cylinder engines (typical top front engine view)
(1) Right rail connector
(2) J1/P1 ECM connector
(3) J2/P2 ECM connector
(4) Fuel pump relay
Illustration 3 g03283019
Location of the fuel priming pump (typical front right engine view)
(5) Connector for the fuel priming pump
Illustration 4 g01447112
Terminal locations for the high-pressure fuel pump at the P1 ECM connectors
(P1-10) Fuel priming pump
Illustration 5 g03283124
Terminal locations for the high-pressure fuel pump at the P1 ECM connectors
(P1-60) Fuel priming pump
Illustration 6 g01535537
Terminal locations at the right rail connector for the electric fuel priming pump
(Terminal 18) Return
(Terminal 19) Relay signal circuit to the pump
Illustration 7 g01155187
Terminal locations at the connector for the fuel priming pump
(Terminal 1) Relay signal circuit to the pump
(Terminal 2) Return
Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Turn the keyswitch to the OFF position.
B. Inspect the condition of relay (4). Remove the components from the panel and check for good connections. Thoroughly inspect connectors (1), (2), , and (3). Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Check the torque of the allen head screws for each of the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
D. Check the harness and the wiring for abrasion and for pinch points from the connectors for the electric fuel priming pump to the ECM.
Inspect Wiring and Connectors
Results: The connectors and the wiring appear to be OK.
Proceed to Test Step 2.
Results: The connectors and/or the wiring are not OK.
Repair: Repair the connectors and/or the wiring. Replace parts, if necessary.
Verify that the problem is resolved.
2. Check for Active Diagnostic Codes
A. Connect Cat ET to the service tool connector.
B. Restore power to the ECM.
C. Turn the keyswitch to the ON position.
D. Select diagnostic tests from Cat ET.
E. Select the "Override Parameters" screen on Cat ET.
F. Activate the override for the fuel pump relay.
G. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.
Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
H. Deactivate the override for the fuel pump relay.
I. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.
Note: Wait at least 70 seconds in order for the diagnostic codes to become active.
Active Code
Results: No diagnostic codes are active, but a problem is suspected in the circuit for the fuel priming pump.
Proceed to Test Step 6.
Results: A -6 diagnostic code is active at this time.
Repair:
Proceed to Test Step 3.
Results: A -5 diagnostic code is active at this time.
Proceed to Test Step 4.
3. Create an Open at the Connector for the Fuel Pump Relay
A. Remove power from the ECM.
B. Turn the keyswitch to the OFF position.
C. Disconnect the connector from the fuel p