![]() ![]() Check terminals at the ECM harness connector (both ECM and harness side) for damage: bent, corroded and unseated pins or sockets. Perform the following steps to check ECM connectors.ġ. →If either resistance measurement is less than 100 ohms, the signal line (#530) is shorted to the return line (#452) or battery ground. →If both resistance measurements are greater than 100 ohms or open, replace OPS. Also measure resistance between P2 and Y2. Measure resistance between socket P2 and a good ground. Perform the following steps to check for a short.Ģ. →If the resistance measurement is greater than 5 ohms or open, the signal line (#530) is open. →If the resistance measurement is less than or equal to 5 ohms, refer to "Check for Short to Ground". Measure resistance between sockets P2 and Y2 on the engine harness connectors. Install a jumper wire between sockets A and B of the OPS harness connector.Ĥ. Disconnect the engine harness connector at the ECM. Perform the following steps to check for signal open.Ģ. →If the terminals and connectors are not damaged, replace the OPS. →If the terminals and connectors are damaged, repair them. Check terminals at the OPS connectors (both the sensor and harness side) for damage: bent, corroded and unseated pins or sockets. Perform the following steps to check the OPS connectors.Ģ. →If codes 100/3 or 19/3 and any other codes except 100/4 or 194 were logged, refer to section "Check Oil Pressure Sensor Connectors".įigure 1.5 - Engine Harness Connector to Oil Pressure Sensor →If active codes 100/4 or 19/4, and any other codes were logged, refer to "Check for +5 Volts". If active codes 100/3 or 4 or 19/3 or 4 were not logged, warm up engine until either codes are logged or the engine temperature (COOLANT TEMP or OIL TEMP) has been greater than 60 deg C (140 deg F) for one minute. →If codes 100/3 or 19/3, and any other codes except 100/4 or 19/4 were logged, refer to "Check Oil Pressure Sensor Connectors".Ħ. →If active codes 100/4 or 19/4 and any other codes were logged, refer to "Check for +5 Volts". If active codes 100/3 or 4 or 19/3 or 4, were logged, proceed with the following: Disconnect OPS connector and install a jumper wire between sockets B and C of the OPS harness connector. Perform the following steps to check the sensor.Ģ. ![]()
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