Post by
livelyjay »
https://forums.nicoclub.com/livelyjay-u16717.html
Sun May 19, 2013 1:27 pm
Done with troubleshooting for the day. Fixed the idle switch, now the car starts, then abruptly dies. Below is what I did, step by step in the order written.
ECU MODE 4
- No red light activation with accelerator
IDLE SWITCH
- Mixed up pin E and pin F at the harness connector
- Swapped pin E and F, reran test
- Checked resistance of harness to ECU and it checks out
- Checked resistance with accelerator and it checked out (no continuity accelerator up, continuity accelerator down)
ECU MODE 4
- Red light is now working
START CAR
- Starts, stumbles around 1000rpms and dies
THROTTLE SENSOR
- Harness connector checks out with resistance at 3.0 ohms between connector and ECU
- Ignition ON, pin F to ground = 5 volts
- Ignition ON, pin E to ground (.46 volts accelerator up, 4.0 volts accelerator up)
ENGINE TEMP SENSOR
- Harness connector DOES NOT check out
- Connector A to Pin 30 = 9.9 ohms
- Connector B to Pin 28 = no continuity
- Connector B to any ground at ECU = 80 ohms
- Connector B to any 12v source at ECU = 180 ohms
- I also can't get a resistance reading across the pins on the sensor itself, shows no continuity
AIR REGULATOR
- Harness pin B to ground only goes to 12v for about 1 second, should be 5 seconds according to manual
- Harness pin A to ground shows 1.2 ohms
- **** Not sure where the fuel pump relay is, so I couldn't check continuity between pin B and fuel pump pin #5
MAF
- Harness A to Pin 37 = 1.4 ohms
- Harness C to Pin 26 = 1.3 ohms
- Harness D to Pin 27 = 1.3 ohms
- Ignition ON, Harness B to Ground = 10.6 volts
- Can't check signal during warm up
ECU MODE 3
- 5 red lights followed by 5 green lights
ECU MODE 4
- Still works, red light on accelerator down, red light off accelerator up