I have a 2001 LX470, 353,000 km in Calgary, Alberta. Owned for 1.5 years.
Previous owner had it 10 years in Calgary and Golden, BC.
Right now it cranks fast, trying to catch and stalling many times while cranking. Starts for 1-5 seconds when fuel pump hot wired then sputters and dies.
I was driving to the ski hill in Dec 2020 after a dump and it lost power and died. I coasted to a stop on the road with 4-5 foot snow banks covering the shoulder, so I was parked in the driving lane. People were helpful and a Scottish guy stopped to help. He said he loved the cruisers when working in the middle east, but can't afford one here. I got towed by his Dodge half-ton 10 min to the ski hill, and I always make fun of my friend's Dodge pickup and how much he has to fix it. Embarassing.
Now that the weather is nice, I have been working on it for a couple weeks a bit each day and still can't get it going.
I have no fuel at the fuel filter, no power to the fuel pump on the top two connectors at the pump when cranking. When the pump is direct-wired from battery the truck starts for 1-5 seconds then stalls . I have 1.5 volts on the top right (ground) w/ ignition on, nothing while cranking. Which is slightly weird. No continuity to ground on top right when cranking. No continutity on either of the top two wires to any contact on the ECD plug (actually I get 445 to 1500 ohms resistance on one contact at pump, no continuity on the other).
Fuel pump connection image attached from the public library Auto Repair online system.
I replaced the old Denso Iridium spark plugs, which were old and had some carbon built up, but working, just a little slow starting. Spark seems to be strong on one cylinder that I checked.
New fuel pump. Both old and new pump test ok at 1.5 ohms and both work when given 12 V direct power. Old one is out of truck, new one tested in truck (runs for 1-5 seconds, sputters and dies when hot wired).
EFI fuse is ok, 12.57 V on both sides, and looks good, not melted. Fuse box does not show signs of heat. I put in a new 20 A fuse & tried a new 30 A fuse. Still no start.
ECD Relay tests ok at Lexus dealer. 074 Ohm across terminals 1&3. Clicks on/off with key, does not seem to be chattering.
Tried hot-wiring + to Terminal F and between E & F on the ECD relay plug on the fuse box, no start.
Tried 3 different keys. Immobilizer light blinks at first and goes out. Immobilizer light stays on if I use the metal key withought the chip card held near the key, so this makes me think that this is working correctly. Light goes out when chip card is held near ignition.
I reset the inertia switch above the gas pedal, no start.
Next I am going to try and check continuity on wires between fuel pump plug and fuel pump control unit.
Is the fuel pump ECU between the ECD relay and pump?
I have been driving a backup truck that I was planning on selling. It is a GMC Sierra 2500 HD. All I need is to 4x4 and to haul 2 ATV's or 2-3 dirt bikes and it is really overkill with that thirsty 6 L, but it WORKS!
I ruled out timing belt slip or fail, because it starts on ether (farm talk for starting fluid) or hot-wired fuel pump.
I'm frustrated with my 100 and planning a 6 day camping and dirt biking trip this weekend.
What should I do next?
Previous owner had it 10 years in Calgary and Golden, BC.
Right now it cranks fast, trying to catch and stalling many times while cranking. Starts for 1-5 seconds when fuel pump hot wired then sputters and dies.
I was driving to the ski hill in Dec 2020 after a dump and it lost power and died. I coasted to a stop on the road with 4-5 foot snow banks covering the shoulder, so I was parked in the driving lane. People were helpful and a Scottish guy stopped to help. He said he loved the cruisers when working in the middle east, but can't afford one here. I got towed by his Dodge half-ton 10 min to the ski hill, and I always make fun of my friend's Dodge pickup and how much he has to fix it. Embarassing.
Now that the weather is nice, I have been working on it for a couple weeks a bit each day and still can't get it going.
I have no fuel at the fuel filter, no power to the fuel pump on the top two connectors at the pump when cranking. When the pump is direct-wired from battery the truck starts for 1-5 seconds then stalls . I have 1.5 volts on the top right (ground) w/ ignition on, nothing while cranking. Which is slightly weird. No continuity to ground on top right when cranking. No continutity on either of the top two wires to any contact on the ECD plug (actually I get 445 to 1500 ohms resistance on one contact at pump, no continuity on the other).
Fuel pump connection image attached from the public library Auto Repair online system.
I replaced the old Denso Iridium spark plugs, which were old and had some carbon built up, but working, just a little slow starting. Spark seems to be strong on one cylinder that I checked.
New fuel pump. Both old and new pump test ok at 1.5 ohms and both work when given 12 V direct power. Old one is out of truck, new one tested in truck (runs for 1-5 seconds, sputters and dies when hot wired).
EFI fuse is ok, 12.57 V on both sides, and looks good, not melted. Fuse box does not show signs of heat. I put in a new 20 A fuse & tried a new 30 A fuse. Still no start.
ECD Relay tests ok at Lexus dealer. 074 Ohm across terminals 1&3. Clicks on/off with key, does not seem to be chattering.
Tried hot-wiring + to Terminal F and between E & F on the ECD relay plug on the fuse box, no start.
Tried 3 different keys. Immobilizer light blinks at first and goes out. Immobilizer light stays on if I use the metal key withought the chip card held near the key, so this makes me think that this is working correctly. Light goes out when chip card is held near ignition.
I reset the inertia switch above the gas pedal, no start.
Next I am going to try and check continuity on wires between fuel pump plug and fuel pump control unit.
Is the fuel pump ECU between the ECD relay and pump?
I have been driving a backup truck that I was planning on selling. It is a GMC Sierra 2500 HD. All I need is to 4x4 and to haul 2 ATV's or 2-3 dirt bikes and it is really overkill with that thirsty 6 L, but it WORKS!
I ruled out timing belt slip or fail, because it starts on ether (farm talk for starting fluid) or hot-wired fuel pump.
I'm frustrated with my 100 and planning a 6 day camping and dirt biking trip this weekend.
What should I do next?
