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Doug
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8547
Experience:  Mitsubishi employed and Factory trained ASE certified technician
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Mitsubishi Montero Sport: 2000 Montero Sport, Vin H. brought

Customer Question

2000 Montero Sport, Vin H. brought to me crank but no start. tested the obvious first, found a bad crank sensor. replaced crank sensor and timing belt and removed and charged battery, also replaced master 100a fuse as it was blown. Vehicle still cranks but does not start, have good signal from crank sensor. Also when i received the vehicle tried to view the pulse from the cps using a scan tool, but it would not connect, scan tool simply said "vehicle voltage at DLC connector too low" but i could not find any obvious wire damage etc or blown fuses
Submitted: 1 year ago.
Category: Mitsubishi
Expert:  Doug replied 1 year ago.
Hi,
The LED operation is for starter interrupt only, so you don't need to worry about that.
You need to check your voltage at the crank sensor... if you do not have 12V and 5V on two wires with the key on (Sensor unplugged), then there is either going to be a fuse failure you missed (check in the dash too) or a wiring/ecu failure.
If you DO have 12V and 5V at the crank sensor, then you need to check and see if you have injector pulse while cranking. If you do not have ground pulse but there is 12V there with the key on, then there is most likely an immobilizer problem.
The lack of scan tool operation however makes it most likely there is an over looked fuse failure or ecu failure... and given the crank sensor failing and the 100A fusible link being failed, it is much more likely there are still fuses blown that haven't been caught yet.
Customer: replied 1 year ago.
So retested the crank sensor. 12v key on on red wire, 12v at black wire, .3v to 5v at blue signal wire while turning crank by hand with key on. have not checked fuel system yet but can smell fuel coming from throttle body while cranking. checked for spark, and there is no spark from any of the coils. checked power and ground at the 3 connectors going to the coils, while cranking I am getting a max of .5v on the power side, but i have good 12v ground on each black wire. ran through both underhood and underdash fuse blocks again and have found no problems with fuses.
Expert:  Doug replied 1 year ago.
If you do not have constant 12V on the coils while the key is on (just the 12V wire, not the ground) and all your fuses are intact, your only possible cause would be a wiring problem, nothing else. The coils should have 12V whenever the key is on at one wire of each coil, fed right from the ignition switch. There is nothing else in between that would cause you to lose power like that.