Diagnosis System

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in Fig 1 , it is possible to enter the diagnostic check mode.

Fig 1: A/C Control Switch Operation Flow Diagram
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CHECK DLC3

The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAEJ1962 and matches the ISO 9141-2 format.

Fig 2: Identifying Terminals Of DLC3

DLC3 TERMINAL CONNECTION/VOLTAGE OR RESISTANCE

Terminal No.	Connection/Voltage or Resistance	Condition
7	Bus + Line/Pulse generation	During transmission
4	Chassis Ground - Body Ground/1 Ω or less	Always
5	Signal Ground - Body Ground/1 Ω or less	Always
16	Battery Positive - Body Ground/9 to 14 V	Always