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No crank no start, code code P1237

Tiny
PARAG_MED
  • MEMBER
  • 2000 FORD CONTOUR
  • 2.5L
  • V6
  • 2WD
  • MANUAL
  • 172,000 MILES
Fuel pump relay clicks, Fuel pump fuse okay. Gas cap checked okay. Did a diagnostic check and got error code P1237.
Fuel System A status OL
fuel system B status __
Calculated load value 0.0%
Engine coolant temperature 1 degree C
Short Term fuel trim- bank 1 99.2 %
long term fuel bank 1 0.0 %
Short term fuel bank 2 99.2 %
long term fuel tri bank 2 0.0%
Engine RPM 0 RPM
Vehicle Speed sensor 0 km/h

Based on this data I do not know if it is the fuel pump driver module or the fuel pump.
I would appreciate if anyone can provide insight.
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Saturday, March 23rd, 2019 AT 2:15 PM

12 Replies

Tiny
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  • MECHANIC
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Good afternoon,

Do you have a voltmeter or test light to do some checks?

P1237
Descriptor
Fuel Pump Secondary Circuit Malfunction
Probable Causes
Circuits Associated With Fuel Pump Relay (For LS6, LS8)
Fuel Pump Circuit Open or Shorted
Fuel Pump Driver Module (FPDM) Damaged
Fuel Pump Power Circuit Open or Shorted
Fuel Pump Return Circuit to Fuel Pump Driver Module (FPDM) Open
Fuel Pump Rotor Locked

I attached a wiring diagram. You need to verify the fuse circled has power on both sides. The wires at the module need to be confirmed as well. They should be hot in the start mode.

Roy
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Saturday, March 23rd, 2019 AT 2:55 PM
Tiny
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Thanks for the prompt reply. I have a multimeter and I have checked the inertia switch.
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Saturday, March 23rd, 2019 AT 5:47 PM
Tiny
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Okay, what were the results? Do you have voltage on both sides?

Roy
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Saturday, March 23rd, 2019 AT 6:01 PM
Tiny
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With a multimeter what is the best way to measure the voltage across the fuse?
For the module do I measure the voltage between pin 2& pin 9 as well as pin 2 and pin 10. Can I remove the connector and measure voltage on the connector pins?
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Saturday, March 23rd, 2019 AT 6:03 PM
Tiny
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I have not measured the voltages yet but I just wanted to let you know that I had checked the inertia switch.
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Saturday, March 23rd, 2019 AT 6:06 PM
Tiny
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Use a volt meter and check for the voltage at the switch.

Roy
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Saturday, March 23rd, 2019 AT 6:16 PM
Tiny
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With a multi-meter what is the best way to measure the voltage across the fuse?
For the module do I measure the voltage between pin 2 and pin 9 as well as pin 2 and pin 10. Can I remove the connector and measure voltage on the connector pins with a multi-meter?
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Saturday, March 23rd, 2019 AT 6:24 PM
Tiny
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Put the black lead on a good body ground and the red on the terminal. Check the voltage at each pin.

Roy
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Saturday, March 23rd, 2019 AT 6:27 PM
Tiny
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Hi Roy,
Thanks for your prompt reply.
Here are the voltages that I measured
both side of the fuel pump fuse 12.04 v
here are the voltages on all the pins on the module
pin1 -.06 V
pin 2.03 V
pin 3.02 V
pin 4 0 V
pin 5 0 V
pin 6 0 V
pin 7 6.77 V
pin 8 0 V
pin 9 11.98 V
pin 10 0.03 v

Parag
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Sunday, March 24th, 2019 AT 8:03 AM
Tiny
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These voltages on the fuse were measured without removing the module. The voltages on the connector pin were measured after removing the module.
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Sunday, March 24th, 2019 AT 8:11 AM
Tiny
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Roy,
I also measured the voltage across pin 2 and pin 9 with the module removed and the voltage was 12.04 volts. Please let me know if you need any additional information.

Thanks

Parag
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Sunday, March 24th, 2019 AT 1:37 PM
Tiny
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It looks like you have power to the pump from the module.

I would replace the pump.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Roy
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Monday, March 25th, 2019 AT 3:03 AM

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