I have an 1989 4runner 3vze 4x4 automatic with the usual temp sensor issues and the code 52 . I have replaced the knock sensor and harness. I want to know which sensors talk to what ecm/tcm, and what was the fix that Toyota engineered to fix the sensor Pod problems. My 4runner continues to show code 52 after 3 to 5 days of clearing the code and the overdrive will not stay engaged. My engine
temp gauge in the dash typically shows low engine temp.
JA: Sometimes things that you think will be really complicated end up being easy to fix with a Toyota. The Toyota Mechanic I'm going to connect you with knows all the tricks and shortcuts. Are you hoping to fix this yourself?
JA: Great! What have you tried so far?
Customer: New sensors and disconnected the ecm to check for bad conections
JA: Is there anything else important you think the Toyota Mechanic should know about your Toyota?
Customer: If I let the truck worm up in the drive way, it will shift very smoothly and the overdrive will work until I drive , which will make the engine tempo drop.then it will shift out of overdrive. if I don't worm it up in the drive, then it will shift hard until the engine warms up. the overdrive will not work
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Toyota Mechanic about your situation and then connect you two.