TC and CG Terminal Circuit [10/2014 - 10/2015]: Procedure

1. Check if CAN communication system DTCs are output (Refer to DIAGNOSIS SYSTEM [10/2014 - 10/2015] ).

   Result

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] )

Result: 

A 

See step  2

1. Check if DTC C2179/79 is output (Refer to DTC C2179/79: Tire Pressure Monitor ECU Communication Stop [10/2014 - ] ).

   Result

   Result	Proceed to
   DTC C2179/79 is not output.	A
   DTC C2179/79 is output.	B

Result: 

B 

GO TO DTC C2179/79 

(Refer to DTC C2179/79: Tire Pressure Monitor ECU Communication Stop [10/2014 - ] )

Result: 

A 

See step  3

1. Disconnect the A18 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D28-13 (TC) - A18-45 (TC)	Always	Below 1 Ω
   D28-13 (TC) - Body ground	Always	10 kΩ or higher
   A18-45 (TC) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D28-4 (CG) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of DLC3

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Reconnect the A18 ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D28-13 (TC) - D28-4 (CG)	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of DLC3

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 10/2015] )

Result: 

NG 

REPLACE ECM 

(Refer to REMOVAL [10/2014 - ] )