DTC P0107 (P_Slow): Pressure Sensor Circuit Low Input
- Connect SSM. Start engine. Set SSM function mode to F21. If displayed value is less than 0 kPa, go to next step. If displayed value is more than 0 kPa, system is normal. Check for poor connections or intermittent open circuits.
- Using DVOM connected to ground, backprobe ECM connector terminal No. 21. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, check while wiggling wiring and connector of ECM. If voltage changes, repair poor contact in wiring or ECM connector. If voltage remains more than 4.5 volts, replace ECM with known good replacement and retest.
- Check voltage at ECM connector terminal No. 26. If voltage reading is less than .2 volts, go to next step. If voltage reading is .2 volts or more, check SSM function mode 21. If reading changes while wiggling wiring and connector, repair poor contact or wiring. If reading does not change, go to next step.
- Turn ignition off. Disconnect pressure sensor connector. Turn ignition on. Check voltage between pressure sensor connector terminal No. 3 and chassis ground. If voltage is more than 4.5 volts, go to next step. If voltage is 4.5 volts or less, repair open circuit in wiring or poor contact at ECM and pressure sensor connector.
- Turn ignition off. Disconnect ECM connector. Check resistance between ECM connector terminal No. 20 and pressure sensor connector terminal No. 1. If resistance is 1 ohm or less, go to next step. If resistance is more than 1 ohm, repair open circuit in wiring or poor contact in ECM and pressure sensor connector.
- Check resistance between pressure sensor connector terminal No. 2 and ground. If resistance is 500 ohms or more, go to next step. If resistance is less than 500 ohms, repair short circuit in wiring.
- Check pressure sensor connector. If connector has poor contact, repair connection. If contact is okay, replace pressure sensor.