Distance Control ECU Power Source Circuit: Procedure

1. Disconnect the distance control ECU connector.
   Fig 1: Identifying Distance Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A8-12 (GND) - Body ground	Always	Below 1 Ω
   A8-10 (SGND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Distance Control ECU)

3. Reconnect the distance control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the distance control ECU connector.
   Fig 2: Identifying Distance Control ECU 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
   A8-1 (+B) - Body ground	Engine switch on (IG)	10 to 14 V
   A8-1 (+B) - Body ground	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Distance Control ECU)

3. Reconnect the distance control ECU connector.

NG → See step   3 

OK → See step   9 

1. Remove the IG1 relay from the instrument panel J/B.
   Fig 3: Identifying IG1 Relay Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

3. Reinstall the IG1 relay.

NG → REPLACE IG1 RELAY 

OK: Go to next step 

1. Disconnect the distance control ECU connector.
2. Remove the IG1 relay from the instrument panel J/B.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A8-1 (+B) - 3 (IG1 relay)	Always	Below 1 Ω

4. Reinstall the IG1 relay.
5. Reconnect the distance control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DISTANCE CONTROL ECU - INSTRUMENT PANEL J/B) 

OK: Go to next step 

1. Remove the IG1 relay from the instrument panel J/B.
   Fig 4: Identifying IG1 Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   5 (IG1 relay) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Instrument Panel J/B

3. Reinstall the IG1 relay.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 RELAY POWER SOURCE CIRCUIT) 

OK: Go to next step 

1. Remove the IG1 relay from the instrument panel J/B.
   Fig 5: Identifying IG1 Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (IG1 relay) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Instrument Panel J/B

3. Reinstall the IG1 relay.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 RELAY - BODY GROUND) 

OK: Go to next step 

1. Disconnect the main body ECU connector.
2. Remove the IG1 relay from the instrument panel J/B.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (IG1 relay terminal) - E61-3 (IG1D)	Always	Below 1 Ω
   2 (IG1 relay terminal) - E61-3 (IG1D) - Body ground	Always	10 kΩ or higher

4. Reconnect the main body ECU connector.
5. Reinstall the IG1 relay.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 RELAY - MAIN BODY ECU) 

OK → See step   8