Alright SM guru's. I come to you seeking some knowledge. I have an intermittent starting problem with my 7MGTE. It's embarrassing and I can't seem to track it down.
Overview: Car will always crank ok, but will occasionally fail to start. This seems to happen more when it is hot or warm, but has also happened after sitting in cold weather for over 8 hours. The car has never stalled while running, the problem appears to only be present while trying to start. I get both codes: 14 and 43.
Troubleshooting Performed: I've gone through all the TSRM testing I can find that may be related. I've tested the igniter, ignition coil, ECU, all wiring back to the ECU and replaced the CPS with a reman unit. All tests pass.
The two codes don't seem to have much in common.
14: Ignition Signal. No IGF signal to ECU 3 times in succession.
43: Starter Signal. No STA signal to EDU for 8 seconds when engine speed is between 2500 rpm and 4000 rpm and coolant temp is below 80C and NSW is off.
43 Doesn't make a lot of sense to me. I've never had a problem cranking and I haven't pop started the car since I cleared codes last. 14 sounds like it may be the igniter, but it is passing all tests and hasn't failed on me while driving. I'd think a bad igniter would go bad while driving as well as while cranking, but perhaps that's wrong.
Do these two codes share a common potential fault I'm failing to see? I'm coming up with nothing and although I've enjoyed learning how to perform a handful of new test procedures I'd really like to just get this figured out.
Any help is appreciated. Thanks guys.
-Andy
Update: Problem was resolved with a new battery and grounding the igniter. I can't explain exactly how the battery would fix the no start condition, but it appears to have fixed it.
Overview: Car will always crank ok, but will occasionally fail to start. This seems to happen more when it is hot or warm, but has also happened after sitting in cold weather for over 8 hours. The car has never stalled while running, the problem appears to only be present while trying to start. I get both codes: 14 and 43.
Troubleshooting Performed: I've gone through all the TSRM testing I can find that may be related. I've tested the igniter, ignition coil, ECU, all wiring back to the ECU and replaced the CPS with a reman unit. All tests pass.
The two codes don't seem to have much in common.
14: Ignition Signal. No IGF signal to ECU 3 times in succession.
43: Starter Signal. No STA signal to EDU for 8 seconds when engine speed is between 2500 rpm and 4000 rpm and coolant temp is below 80C and NSW is off.
43 Doesn't make a lot of sense to me. I've never had a problem cranking and I haven't pop started the car since I cleared codes last. 14 sounds like it may be the igniter, but it is passing all tests and hasn't failed on me while driving. I'd think a bad igniter would go bad while driving as well as while cranking, but perhaps that's wrong.
Do these two codes share a common potential fault I'm failing to see? I'm coming up with nothing and although I've enjoyed learning how to perform a handful of new test procedures I'd really like to just get this figured out.
Any help is appreciated. Thanks guys.
-Andy
Update: Problem was resolved with a new battery and grounding the igniter. I can't explain exactly how the battery would fix the no start condition, but it appears to have fixed it.
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