FZJ80 intermittent no start/no crank

Joined
Aug 4, 2017
Messages
477
Location
Colorado
For the past month I have been having an intermittent no start no crank condition.
  • I turn the key to start, there's a click, and no crank.
  • Happens about 5-10% of the time. In the ~10 times it's happened, 9 of them have been after I was driving for a while already and stopped for gas/errand/food or something and then it can't restart.
  • I have a second aux AGM battery. The first few times this happened I just jumped the two batteries together and it started (thinking the amps would give it a little more persuasion if the starter was getting old). Recently that hasn't worked (or maybe it never worked and it was a placebo). If I wait for a while (10-15 minutes), it has always cranked eventually and runs great.
  • Lights, radio, windows, blower all work.
  • Battery voltage is great. Had the battery tested, and it's above the rated CCA.
  • No CEL until today. Today I had a tough time getting it started. When I got it started, it had CEL codes P0335, P0340, P0385, all Crankshaft Position Sensor codes.
  • Battery connection seems solid.
So obviously I am thinking starter motor, with the theory that heat from driving is giving an early signal of the starter failing. I got a new Denso starter motor today, and I was on my way back to the house when I couldn't start again (the new starter was literally in the passenger seat) and got the CEL codes. I'm going to replace that tomorrow, but I want to make sure I have looked at all possibilities. When I got home, I was able to start it 10 times in a row, cranking strong, no CEL.
 
Joined
Jan 1, 2014
Messages
208
Location
San Diego
I was experiencing almost the exact same scenario (minus the CEL codes) about 3 months ago. Replaced what I thought might of been a weak starting battery (4 years old) but that didn't do it. Inspected fusible links and those looked fine. Ended up replacing the starter and it has been good ever since.
 
Joined
Apr 19, 2016
Messages
67
Location
Texas
I had a similar issue which was caused by a bad starter. I had replaced the battery and fusible link that could had been the cause with no luck. How I found out that it was the starter was, whenever I was in a no start/no crank situation after stopping at a store, a good couple of smacks with a block of wood and hammer onto the starter will always get the engine running again. Eventually I got around to replacing the starter and haven't came across the issue yet.
 
Joined
Nov 24, 2004
Messages
152
Just experienced the same issue. I'll be sure to give the starter a whack the next time that happens. Haven't had to whack a starter in like a hundred years...lol..
 
Joined
Aug 4, 2017
Messages
477
Location
Colorado
Happy to report no problems since I put in a rebuilt Denso starter last week. Did many many starts since then and the starter sounds crisp! I was in some pretty remote areas this weekend, and I gotta say, I wish I had a manual. The starter is a single point of failure on an automatic.
 

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