Dead ISF (no start condition)
01-26-17, 10:44 AM
#16
Driver School Candidate
Thread Starter
Join Date: Jul 2016
Location: ca
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
Do the brake lights come on when you press on the brakes?
Lexus has a very detailed troubleshooting flowchart for this on TIS. It is very odd the dealership techs "can't figure it out" when they have a very structured approach to no start conditions. Definitely sounds like a fuse/relay/switch issue though. If you weren't in the San Diego area, I'd be really curious to take a look at it, but I have no plans to be in California any time soon.
Lexus has a very detailed troubleshooting flowchart for this on TIS. It is very odd the dealership techs "can't figure it out" when they have a very structured approach to no start conditions. Definitely sounds like a fuse/relay/switch issue though. If you weren't in the San Diego area, I'd be really curious to take a look at it, but I have no plans to be in California any time soon.
01-26-17, 02:18 PM
#17
Driver School Candidate
Thread Starter
Join Date: Jul 2016
Location: ca
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
1/26 2pm Update:
Spoke to the mechanic working on the car, there is a wire from the jumper box in front of the battery that is not getting power into the cabin. That particular wire controls everything on the driver side. He is only getting 2volts on the wire vs the 12v needed. He did a direct wire from the jumper box to where the wire is connected and the car started right up.
He is still trying to diagnose where the interruption is coming from. The trouble is this particular wire is loomed in the harness that is behind the engine and into the dash.
No corrosion noted, water damage or rodent damage noted so far.
Spoke to the mechanic working on the car, there is a wire from the jumper box in front of the battery that is not getting power into the cabin. That particular wire controls everything on the driver side. He is only getting 2volts on the wire vs the 12v needed. He did a direct wire from the jumper box to where the wire is connected and the car started right up.
He is still trying to diagnose where the interruption is coming from. The trouble is this particular wire is loomed in the harness that is behind the engine and into the dash.
No corrosion noted, water damage or rodent damage noted so far.
01-26-17, 02:21 PM
#18
1/26 2pm Update:
Spoke to the mechanic working on the car, there is a wire from the jumper box in front of the battery that is not getting power into the cabin. That particular wire controls everything on the driver side. He is only getting 2volts on the wire vs the 12v needed. He did a direct wire from the jumper box to where the wire is connected and the car started right up.
He is still trying to diagnose where the interruption is coming from. The trouble is this particular wire is loomed in the harness that is behind the engine and into the dash.
No corrosion noted, water damage or rodent damage noted so far.
Spoke to the mechanic working on the car, there is a wire from the jumper box in front of the battery that is not getting power into the cabin. That particular wire controls everything on the driver side. He is only getting 2volts on the wire vs the 12v needed. He did a direct wire from the jumper box to where the wire is connected and the car started right up.
He is still trying to diagnose where the interruption is coming from. The trouble is this particular wire is loomed in the harness that is behind the engine and into the dash.
No corrosion noted, water damage or rodent damage noted so far.
01-27-17, 01:36 PM
#22
Driver School Candidate
Thread Starter
Join Date: Jul 2016
Location: ca
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
Interedting. My hope now is to find where the disruption is and its reachable. 2 options given are as follows if unable to find the source:
1. Replace complete harness which is 4k in parts alone.
2. Do a direct connection like the by pass wire with the correct gauge wire and run correctly.
we will see. I will be writing a letter to Corporate to ask for assistance.
01-27-17, 01:56 PM
#23
Interedting. My hope now is to find where the disruption is and its reachable. 2 options given are as follows if unable to find the source:
1. Replace complete harness which is 4k in parts alone.
2. Do a direct connection like the by pass wire with the correct gauge wire and run correctly.
we will see. I will be writing a letter to Corporate to ask for assistance.
1. Replace complete harness which is 4k in parts alone.
2. Do a direct connection like the by pass wire with the correct gauge wire and run correctly.
we will see. I will be writing a letter to Corporate to ask for assistance.
01-27-17, 02:20 PM
#24
Driver School Candidate
Thread Starter
Join Date: Jul 2016
Location: ca
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
01-27-17, 10:44 PM
#25
02-02-17, 10:36 AM
#26
Tech Info Resource
iTrader: (2)
Any update on this? I am very curious how a dome light could take out a harness wire without a dead short and without blowing a fuse first.
02-02-17, 11:17 AM
#27
Driver School Candidate
Thread Starter
Join Date: Jul 2016
Location: ca
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
02-02-17, 02:58 PM
#29
Tech Info Resource
iTrader: (2)
That's directly under the steering ECU. What about the black wire with the crimp in the insulation still in the wire bundle? Did that get addressed at the same time? Is that a crease in the protector as well, right over where the black wire looks like the insulation is damaged?
I would be digging hard to be sure this doesn't happen to other wires in the same location. It looks like the plastic tray underneath the steering ECU damaged the protector and the harness to me.
I would be digging hard to be sure this doesn't happen to other wires in the same location. It looks like the plastic tray underneath the steering ECU damaged the protector and the harness to me.
