What should the voltage be at the fuel pump? I am only getting about 5 to 6 volts... I have found the fuel pump relay module under the hood next to the fuel vapor canister but I am not real sure how to test it as it is not a traditional relay nor do I have a schematic... I am not getting any fuel to the engine...
Must be 12 volts change relay and retest usually the problem
Fuel pump voltage should be 12 volts or as near to it. relay has a voltage drop, 5-6 volts means there is a bad connection, faulty earth or a connection wire, could even be the relay,, check the earthing wire follows from the pump or make a new earthing connection. clean the earthing points on the shell from the batter, put some grease over the connection when clean and tightened,
SOURCE: Fuel pump relay switch and shut off location
There is a safety switch that can be reset under the hood on the passenger side under the fuse box panel.
SOURCE: 1998 land rover discovery LE automatic
fuel pump relay is usually under the hood and should be labeled.often the relay is the same type used for other operations on the vehicle - look for numbers to be the same on the relays then switch them to see if the problem is the relay. if the relays are ok then this sounds like bad ground somewhere. Any water leaks on the vehicle of spills that could start corrosion of a ground wire. good luck
Testimonial: "Thank you for your response.I will check my grounds next. Relay is deffinately on passenger side kick panel still not sure which one it is."
SOURCE: No Fuel to engine: 2003 Land Rover Freelander SE
Make sure that your inertia swicth is not tripped. The Inertia switch is installed to make sure the fuel supply is cut off in case of acident or if you have a heavy vibration. Just look for it and reset it by pressing it down. It is located under the hood on the driver side by the fire wall. close to the brake booster. Hope this help.
CHRYSLER OBDII DTC
P1101 HCM/PCM Communication Performance
P1103 Turbocharger Waste Gate Actuator Malfunction
P1104 Turbocharger Waste Gate Solenoid Malfunction
P1105 Fuel Pressure Solenoid Malfunction
P1195 Slow Switching O2 Sensor Bank One Sensor One During catalyst monitoring
P1196 Slow Switching O2 Sensor Bank two Sensor one During catalyst monitoring
P1197 Slow Switching O2 Sensor Bank One Sensor two During catalyst monitoring
P1198 Radiator Temperature Sensor Input voltage too high
P1199 Radiator Temperature Sensor Input voltage too low
P1281 Engine is cold too long
P1282 Fuel Pump Relay control circuit
P1283 Idle select signal invalid
P1284 Fuel Injection pump battery voltage sensor out of range
P1285 Fuel Injection pump controller always on
P1286 Accelerator Position Sensor (APPS) supply voltage too high
P1287 Fuel Injection pump Controller Supply voltage low
P1288 Intake manifold short runner tuning valve solenoid circuit
P1289 Manifold tune valve solenoid circuit
P1290 CNG Fuel system pressure too high
P1291 No Temp rise seen from intake heaters
P1292 CNG Pressure sensor voltage too high
P1293 CNG Pressure sensor voltage too low
P1294 Target idle not reached
P1295 No 5 volts to TP sensor
P1296 No 5 volts to MAP sensor
P1297 No change in MAP sensor from start to run
P1298 lean operation at wide open throttle
P1299 Vacuum Leak detected (IAC fully seated)
P1300 Ignition timing adjustment circuit failure
P1388 Auto shutdown relay control circuit
P1389 No ASD relay output voltage at PCM
P1390 Timing belt skipped one tooth or more
P1391 Intermittent loss of CMP or CKP
P1398 Mis-Fire Adaptive Numerator at Limit (PCM is unable to learn the crank sensors signal
for use in preparation for misfire diagnostics
P1399 Wait to start lamp circuit
P1403 No 5 volt feed to EGR
P1475 Auxiliary 5 volt supply is too high
P1476 Too little secondary air
P1477 Too much secondary air
P1478 Battery Temp Sensor Volts out of limit
P1479 Transmission Fan Relay Circuit
P1480 PCV Solenoid Circuit
P1481 EATX (Electronic Automatic Transaxle) RPM pulse generator performance
P1482 Catalyst Temperature Sensor Circuit shorted low
P1483 Catalyst Temperature Sensor Circuit shorted high
P1484 Catalytic Converter overheat detected
P1485 Air injection solenoid circuit
P1486 EVAP Leak Monitor found a pinched hose
P1487 Hi Speed Fan #2 Circuit
P1488 Auxiliary 5 volt supply output is too low
P1489 High speed fan control relay circuit
P1490 Low speed fan control relay circuit
P1491 Radiator fan relay control circuit
P1492 Ambient/ Battery Temp sensor input voltage too high
P1493 Ambient/ Battery Temp sensor input voltage too low
P1494 Leak detection pump pressure switch or mechanical fault
P1495 Leak detection pump solenoid circuit
P1496 5 volt supply, output too low
P1498 High speed radiator fan ground control relay circuit
P1500 General alternator 'FR' Terminal circuit fault
P1594 Charging system voltage too high
P1595 Speed control solenoid circuits
P1596 Speed control switch always high
P1597 Speed control switch always low
P1598 A/C pressure sensor input voltage too high
P1599 A/C pressure sensor input voltage too low
P1680 Clutch released switch circuit
P1681 No I/P Cluster CCD/ J1850 messages received
P1682 Charging system voltage too low
P1683 Speed control servo power control circuit
P1684 The battery has been disconnected within the last 50 starts
P1685 The SKIM (Smart Key Immobilizer Module) has received an invalid key
P1686 No SKIM (Smart Key Immobilizer Module) bus message received
P1687 No Mechanical Instrument cluster bus message
P1688 Internal Fuel injection pump controller failure
P1689 No communication between the ECM and injection pump module
P1690 Fuel injection pump CKP sensor does not agree with the ECM CKP sensor
P1691 Fuel injection pump controller calibration error
P1692 Fault in companion Engine control module
P1693 A companion DTC was set in both the ECM and PCM
P1694 No CCD message from PCM- Aisin transmission
P1695 No CCD message from body control module
P1696 PCM failure EEPROM write denied
P1697 PCM Failure SRI (Service Reminder Indicator) mileage not stored
P1698 No CCD message from TCM
P1719 Skip shift solenoid circuit
P1740 TCC solenoid or overdrive solenoid performance
P1756 Governor pressure not equal to target at 15-20 psi
P1757 Governor pressure is above 3 PSI when 0 PSI is requested
P1762 Governor pressure sensor offset improper voltage
P1763 Governor pressure sensor voltage to high
P1764 Governor pressure sensor voltage to low
P1765 Transmission 12 volt supply relay control circuit
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I have an Evaporative fuel system which is the much more expensive fuel pump assembly, so I would like to test everything before getting to that... I have already removed the cover plate in the back of my discovery to expose the fuel tank and top of the fuel pump. Which wires in the two plugs are the proper wires to test for voltage and how much voltage should there be? Just from using some logic I am guessing power is delivered to the fuel pump relay "module" then to the inertia switch then to the fuel pump.?.?. Are there any other relays or fuses other than the relay module that is located next to the fuel vapor canister?
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