Cold Start Injector Circuit [04/2013 - 08/2015]: Procedure
WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT COLD START FUEL INJECTOR ASSEMBLY
- Inspect the cold start fuel injector assembly.
Refer to INSPECTION [04/2013 - 08/2015]
Result
Proceed to OK NG
Result:
NG
REPLACE COLD START FUEL INJECTOR ASSEMBLY. Refer to REMOVAL [04/2013 - 08/2015]
Result:
OK
See step 2
- Inspect the cold start fuel injector assembly.
- INSPECT ECM (STJ1 VOLTAGE)
- Turn the engine switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A77-24 (STJ1) - Body ground Engine switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [04/2013 - 08/2015]
Result:
NG
See step 3
- CHECK HARNESS AND CONNECTOR (COLD START FUEL INJECTOR ASSEMBLY - ECM)
- Disconnect the cold start fuel injector assembly connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F42-1 (STJ1) - A77-24 (STJ1) Always Below 1 Ω F42-1 (STJ1) or A77-24 (STJ1) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - COLD START FUEL INJECTOR ASSEMBLY)
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR