Inspection Procedure

1. Disconnect the cruise control ECU connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between terminal OD of cruise control ECU and body ground.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION (1 OF 2)
   
   

   Condition	Tester Connection	Specified Condition
   IG switch ON	C16-14 (OD) Body ground	10 to 14 V
   IG switch OFF		Below 1 V

OK : CHECK AND REPLACE CRUISE CONTROL ECU ASSEMBLY 

Fig 1: Identifying Cruise Control ECU Connector

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NG : GO TO NEXT STEP 

1. Measure the voltage between terminal OD1 of ECM and body ground.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION (2 OF 2)
   
   

   Condition	Tester Connection	Specified Condition
   IG switch ON	E5-18 (OD1) - Body ground	10 to 14 V
   IG switch OFF		Below 1 V

OK : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Measuring Voltage Between Terminal OD1 Of ECM And Body Ground

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : GO TO NEXT STEP 

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

   Standard resistance (Check for short) 

   TESTER CONNECTION AND SPECIFIED CONDITION (STANDARD RESISTANCE (CHECK FOR SHORT))
   
   

   Tester Connection	Specified Condition
   E6-10 (OD1) - Body ground	10 k or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Checking Harness And Connector (OD1 - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE