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daniel_ve-

daniel_ve- 1/3/2020

2008 Suzuki Forenza Base 4 Cyl 2.00L

Engine

5volts at fuel pump and won't start

Car won't start. Starts and dies if carb fluid is sprayed in the intake. Fuel pump will not run and there is only 5volts at the fuel pump connector. Replaced fuse and relay already. Wondering if the immobilizer might be preventing it from starting. The key works just fine along with the transponder. There is no security light flashing or anything but it's just a thought. What could be preventing from getting 12 volts at the pump? Ignition switch??

6 Answers


Jimm

Jimm 1/4/2020

Before replacing any relay, visually inspect the entire electrical circuit including the component, relays, connectors, and wiring in the circuit. Look for heat damage and damaged wires.

The low voltage condition may be caused by any of the possibilities listed above. Wiring can lose insulation and break down over time and mileage, so carefully check the condition of the individual wire conductors for the fuel pump and control relay circuits.

Be sure to use a detailed wiring schematic and a volt-ohm meter to aid in the circuit troubleshooting.

Wiring can age and breakdown even inside the bundled harnesses, which is why diagnosing and repairing these issues can be time-consuming / labor intensive.

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0
Jimm

Jimm 1/4/2020

Before replacing any relay, visually inspect the entire electrical circuit including the component, relays, connectors, and wiring in the circuit. Look for heat damage and damaged wires.

The low voltage condition may be caused by any of the possibilities listed above. Wiring can lose insulation and break down over time and mileage, so carefully check the condition of the individual wire conductors for the fuel pump and control relay circuits.

Be sure to use a detailed wiring schematic and a volt-ohm meter to aid in the circuit troubleshooting.

Wiring can age and breakdown even inside the bundled harnesses, which is why diagnosing and repairing these issues can be time-consuming / labor intensive.

Reply
0
daniel_ve-

daniel_ve- 1/5/2020

I replaced the relay already but that didn't work either. It seems I'm not getting power from the ecm to power the coil for the fuel pump relay. I have checked continuity on the light green wire from fuse block to ecm plug. Does anyone know how to check for a bad driver at the ecm? Or is the ecm toast? Also could I just swap this ecm with a used one or would it need to be programmed?

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0
daniel_ve-

daniel_ve- 1/5/2020

I replaced the relay already but that didn't work either. It seems I'm not getting power from the ecm to power the coil for the fuel pump relay. I have checked continuity on the light green wire from fuse block to ecm plug. Does anyone know how to check for a bad driver at the ecm? Or is the ecm toast? Also could I just swap this ecm with a used one or would it need to be programmed?

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0
HouseCallAuto

HouseCallAuto 1/8/2020

are there any fault codes stored?

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0
daniel_ve-

daniel_ve- 1/9/2020

There are no faults or codes

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