Am I missing something here?

Tiny
NAINOA
  • MEMBER
  • 1998 TOYOTA 4RUNNER
  • 3.4L
  • 6 CYL
  • 4WD
  • MANUAL
  • 242,000 MILES
I got this diagram of the dlc1 and I noticed I didn’t have #1fp, #4 ox1 #13 vf1 # 14 vf2 #15 ox2 #17 TT and there was one in #21 which the diagram shows nothing supposed to be. What would this cause or in any case affect the vehicle?
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Wednesday, August 2nd, 2023 AT 7:29 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,480 POSTS
Your truck has 2 diagnostic ports. There is the one under the hood that you show and the one under the dash that allows a scan tool to talk to the ECU. The one under the hood connects to the Transmission, ABS and Cruise control. To diagnose problems, you need a scan tool that can connect to both connections as needed. The "missing" pins are now accessed through the under dash ALDLs like to the ECU.
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Wednesday, August 2nd, 2023 AT 4:44 PM

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