If Code P1474 is present, turn ignition off. If resistance is as specified, go to next step. I was told it might be something like a fan relay box. Using scan tester access Output Test Mode. Since you didn't state the year I am going to guess that it is between the 1986-1995 range. Checked Fuel Pressure and It was 35-40 no matter if it was running or not. This was after realizing the car would start after disconnecting and connecting the ignition module after a no start period.
Reconnect all components and recheck system operation. I have a 1995, and it is on top of the radiator frame. Measure resistance between Low Speed Fuel Pump terminal at low speed fuel pump relay wiring harness connector and test pin No. Reconnect all components and recheck system operation. Is more than 10 volts, go to next step.
Command Low Speed Fan On. Measure voltage between breakout box test pin No. Kind of a mess to get to, you have to remove the battery bracket and fish around a bit. If fault is not indicated, problem is intermittent and cannot be duplicated at this time. If either resistance 5 ohms or more, repair open circuit and re-evaluate symptom.
You will hear the fuel pump turn on along with the fan. Test light should be off. Check circuit integrity by shaking and bending fuel system wiring harness. If fuel pump cannot be heard, go to step 173. I don't think it's a fuel issue.
There is a 30 amp fuse somewhere near the box on a yellow wire that goes to the box. Measure voltage between test pin No. If voltage is one volt or less, go to next step. Procedure skips from step 26 to step 30. The car will never stall once running and will start 99% of the time, then will not start for a single attempt or an entire day? Reconnect all components and recheck system operation.
Repair as necessary, reconnect all components and recheck system operation. Measure voltage between ground terminal and Power-To-Fan terminal at inoperative cooling fan motor wiring harness connector. When I get the engine started it runs great, plenty of power, no hesitation, just great. Resistance should be more than 1000 ohms. If resistance is as specified, go to next step. If fault is not indicated, go to next step.
I've noticed on these very hot 90+ days, and closer to 100, my car won't start in the morning. When you turn key to on position not start position do you hear fuel pump run for a few seconds? Replacing your constant control relay module allows you to continue driving your vehicle with confidence, especially in the middle of summer when you rely on your air-conditioning for a little relief. Measure resistance between fuel pump motor ground circuit at connector and chassis ground. Your fuel pump relay is inside this box. We are committed to provide a reasonable customer service and resolve all issues fairly and quickly so that nobody should have a reason to leave a negative feedback. Ensure cooling fan is disconnected. Inspect wiring, and repair if damaged.
If fuel pump can be heard, go to next step. Check for indication of fault while performing one of following:? Connect voltmeter negative probe to negative battery terminal. If cooling fan is still on, go to next step. Fuel injection relies on exact fuel pressure so you have exact pressure drop at fuel injectors. The relays are : 1.
The pump terminal should light the light dimly. Turn ignition on and proceed as follows while noting voltage:? The ccrm constant control relay module includes fuel pump relay which provides power to fuel pump and also pcm. Reconnect all components and recheck system operation. Procedure skips from step 164 to step 170. Test light should be on. Here's a bit of reading for you, pay attention to the test of the ccrm voltage supply, if it test 10.