Cold Start Injector Circuit: Procedure

1. Disconnect the E57 cold start injector connector.
   Fig 1: Identifying E57 Cold Start Injector 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
   1 - 2	20°C (68°F)	11.6 to 12.6 Ω

3. Reconnect the cold start injector connector.

NG → See step   4 

OK: Go to next step 

1. Turn the engine switch on (IG).
   Fig 2: Identifying E3 & E4 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	Specified condition
   E3-7 (STJ1) - E4-7 (E1)	11 to 14 V

NG → See step   3 

OK → See step   5 

1. Disconnect the E57 cold start injector connector.
2. Disconnect the E3 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard (Check for open)

   Tester Connection	Specified condition
   E57-1 - E3-7 (STJ1)	Below 1 Ω

   Standard (Check for short)

   Tester Connection	Specified condition
   E57-1 or E3-7 (STJ1) - Body ground	10 kΩ or higher

4. Reconnect the ECM connector.
5. Reconnect the cold start injector connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → CHECK OR REPLACE HARNESS AND CONNECTOR (COLD START INJECTOR - IG2 RELAY)