3809881 Volvo.Penta Shield

Illustration 1 g01254695
Schematic for the warning lamps
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01186024
Location of the J1/P1 ECM connectors (typical left side engine view)
Thoroughly inspect the J1/P1 ECM connector and the vehicle's firewall bulkhead connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01254702
Terminal locations at the P1 ECM connector for the warning lamps
(P1-29) Warning lamp or low oil pressure lamp
(P1-30) Output No. 1 (PTO switch on lamp or low coolant level lamp)
(P1-31) Output No. 9 (High coolant temperature lamp)
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that is associated with the terminal for the suspect lamp.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasion and for pinch points from the battery to the ECM. Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or wiring.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. Check for Normal Operation of the Suspect Lamp
Monitor the suspect lamp.
Turn the keyswitch to the ON position. Each of the warning lamps will turn on for a minimum of two seconds after the keyswitch is turned to the ON position. The lamp will then turn off.
Turn the keyswitch to the OFF position. Expected Result:The suspect lamp turns on and the lamp turns off per the above description.Results:
OK - The suspect lamp turns on and the lamp turns off per the above description.Repair: The warning lamps appear to operating correctly at this time. There may be an intermittent electrical problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for information that is related to troubleshooting intermittent electrical problems.STOP
Not OK - The suspect lamp does not turn on or the suspect lamp does not turn off per the above description. Check that the bulb for the lamp is not blown. Check any circuit protection that may be tripped. If the bulb is OK and the circuit protection is not tripped, then there is a problem in the circuit for the suspect lamp. Proceed to Test Step 3.Test Step 3. Test the Lamp Circuit
Disconnect the J1/P1 ECM connector.
Fabricate a jumper wire that is long enough to create a short circuit across two terminals at the ECM connector. Crimp connector pins to both ends of the jumper wire.
Install the jumper wire across the terminal at the P1 ECM connector for the suspect lamp and terminal P1-65 (−Battery).
Turn the keyswitch to the ON position.
Check for illumination of the suspect lamp while you insert the jumper wire into the circuit. Also, check for illumination of the suspect lamp after you remove the jumper wire from the circuit.
Turn the keyswitch to the OFF position.
Remove the jumper wire from the circuit. Leave the J1/P1 ECM connectors disconnected. Expected Result:The suspect lamp turns on while the jumper wire is installed. The suspect lamp turns off when the jumper wire is removed.Results:
OK - The check engine lamp turns on while the jumper wire is installed. The check engine lamp turns off when the jumper wire is removed. The circuit for the suspect lamp is functioning properly. There may be a problem with the ECM. Proceed to Test Step 4.
Not OK - Either of the following conditions are present: The suspect lamp does not turn on while the jumper wire is installed in the circuit. The suspect lamp does not turn off when the jumper wire is removed from the circuit.Repair: There is a problem in the OEM wiring harness that is between the ECM connector and the power supply for the lamp circuit. Repair the circuit or send the vehicle to the OEM dealer for repairs.STOPTest Step 4. Check the Operation of the ECM
Fabricate a jumper wire that is long enough to provide a test circuit at the ECM connector. Crimp a connector socket to one end of the jumper wire.
Remove the wire from the terminal location for the suspect lamp at the ECM connector. Insert the jumper wire into this terminal location.
Connect the J1/P1 ECM connectors.
Install a test lamp between the loose end of the jumper wire and a source of battery voltage that is known to be powered.
Check for illumination of the test lamp while you turn the keyswitch to the ON position. The test lamp will turn on with the keyswitch and the test lamp will remain on for a minimum of two seconds.
Turn the keyswitch to the OFF position. The test lamp will turn off with the keyswitch.Expected Result:The suspect lamp turns on and the suspect lamp turns off per the above description.Results:
OK - The suspect lamp turns on and the suspect lamp turns off per the above description.Repair: The ECM is operating correctly and the circuit for the suspect lamp appears to be in good repair. There may be an intermittent electrical problem in the harness or in a connector. If an intermittent problem is susp