Hino 258 trans light

Phil@WAP

New Recruit
Mechanic
I am working on a 2007 Hino with a transmission light and derate problem. Have gotten a code for no communication with the tcm, have gone through the wiring and made repairs to damaged wires. still having the issue, have swapped the tcm for a known good. no change. any Ideas?
 

Baja

New Recruit
Owner/Operator
I had problem with pin being pushed in on a plug for transmission i could not start on the ignition switch at all
Since that no problem
Just an idea
 

Hino123

Expert Expediter
Researching
load test wires with a headlamp. You can perform a wire overlay. Check the pass through connectors for green pins. No communication could be datalink, power or ground. Load test the power and ground and check resistance at the TCM. Let us know what you find.
 
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