Difficult To Start
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
Difficult To Start, Cranks Normal
- Check starter signal circuit. See STARTER SIGNAL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. For GX470 and LX470 see DTC P0617 in appropriate SELF-DIAGNOSTICS article.
- Check fuel pump control circuit. On all models, see FUEL PUMP CONTROL CIRCUIT under FUEL SYSTEM in appropriate SYSTEM & COMPONENT TESTING article.
- Check engine compression. See BASIC DIAGNOSTIC PROCEDURES article.
Difficult To Start When Cold
- Check starter signal circuit. See STARTER SIGNAL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. For GX470 and LX470 see DTC P0617 in appropriate SELF-DIAGNOSTICS article.
- Check fuel pump control circuit. On all models , see FUEL PUMP CONTROL CIRCUIT under FUEL SYSTEM in appropriate SYSTEM & COMPONENT TESTING article.
Difficult To Start When Hot
- Check starter signal circuit. See STARTER SIGNAL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. For GX470 and LX470 see DTC P0617 in appropriate SELF-DIAGNOSTICS article.
- Check fuel pump control circuit. On all models, see FUEL PUMP CONTROL CIRCUIT under FUEL SYSTEM in appropriate SYSTEM & COMPONENT TESTING article.