LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Help Please 97 LS wont start only 1.7V to igniter

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Old 07-22-19, 12:25 AM
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plexus914
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Quote "....I went to the shop today with my valet key and the car started right up. So it would seem that the original master key lost its programming.................and now the valet key is doing the same thing as before.
No spark and No fuel, same as before this indicates that the immobilizer is kicking in preventing the car from starting."



BE-208 recommends checking the transponder key computer input when no key works.
If I was you I would start with the immobilizer box (transponder key computer ECM) and check codes on the check connector as described in BE-210 and so on (see code list & malfunction list).




Electronic Control Module - ECM - Key Computer location





A little confusing - OP3 or OP1???

OP1 Immobilizer self-diagnostic codes





Last edited by plexus914; 07-22-19 at 12:58 AM.
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