Inspection Procedure

1. Operate the intelligent tester according to the step on the display and select "DATA LIST".

   ENGINE 

   DATA LIST - ENGINE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ENGINE SPD	Engine speed/Min.: 0 rpm, Max.: 16,383 rpm	Almost the same as actual engine speed (When engine is running)	-

   OK: 

   Engine speed display on the tester is almost the same as the actual engine speed. 

NG: GO TO ENGINE CONTROL SYSTEM

OK: Go to next step 

1. Disconnect the C6 meter connector.
2. Using an oscilloscope, check the signal waveform of the meter.
   WAVEFORM REFERENCE
   
   

   Tester Connection	Tool Setting	Vehicle Condition
   C6-26 - Body ground	5V/DIV., 10 ms./DIV.	Engine idle speed

   Fig 1: Identifying C6 Combination Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   As shown in  Fig 1 . 

NG: Go to step 3 

OK: REPLACE COMBINATION METER ASSEMBLY 

1. Disconnect the C6 meter connector.
2. Disconnect the E5 ECM connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   C6-26 - E5-1	Below 1 Ω
   C6-26 - Body ground	10 kΩ or higher

   Fig 2: Identifying Combination Meter And ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE ECM