Difficult To Start
NOTE:
On Celica and ECHO, starter signal circuit testing information is not available from manufacturer.
Difficult To Start, Cranks Normal
- Check starter signal circuit. See STARTER SIGNAL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article.
- On all models except Camry CNG, Land Cruiser and Tundra V8, check fuel pump control circuit. See FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. On Land Cruiser, perform DTC P1200: FUEL PUMP RELAY/ECU CIRCUIT test in SELF-DIAGNOSTICS - LAND CRUISER article. On Camry CNG, check fuel shutoff valve circuit. See DTC P1190: FUEL PRESSURE REGULATOR MALFUNCTION test in SELF-DIAGNOSTICS - CAMRY CNG article. On Tundra V8, check fuel pump control circuit. See DTC P1200: FUEL PUMP RELAY CIRCUIT test in SELF-DIAGNOSTICS - TUNDRA V8 article.
- Check engine compression. See appropriate 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.
- On all models except Camry CNG, Land Cruiser and Tundra V8, check fuel pump control circuit. See FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. On Land Cruiser, perform DTC P1200: FUEL PUMP RELAY/ECU CIRCUIT test in SELF-DIAGNOSTICS - LAND CRUISER article. On Camry CNG, check fuel shutoff valve circuit. See DTC P1190: FUEL PRESSURE REGULATOR MALFUNCTION test in SELF-DIAGNOSTICS - CAMRY CNG article. On Tundra V8, check fuel pump control circuit. See DTC P1200: FUEL PUMP RELAY CIRCUIT test in SELF-DIAGNOSTICS - TUNDRA V8 article.
Difficult To Start When Hot
- Check starter signal circuit. See STARTER SIGNAL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article.
- On all models except Camry CNG, Land Cruiser and Tundra V8, check fuel pump control circuit. See FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. On Land Cruiser, perform DTC P1200: FUEL PUMP RELAY/ECU CIRCUIT test in SELF-DIAGNOSTICS - LAND CRUISER article. On Camry CNG, check fuel shutoff valve circuit. See DTC P1190: FUEL PRESSURE REGULATOR MALFUNCTION test in SELF-DIAGNOSTICS - CAMRY CNG article. On Tundra V8, check fuel pump control circuit. See DTC P1200: FUEL PUMP RELAY CIRCUIT test in SELF-DIAGNOSTICS - TUNDRA V8 article.