Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem symptoms. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
SFI system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | Reference |
|---|---|---|
| Engine does not crank (does not start) |
|
STARTER |
|
STARTER RELAY | |
|
IGNITION SWITCH | |
|
VC OUTPUT CIRCUIT | |
| No initial combustion (does not start) |
|
ECM POWER SOURCE CIRCUIT |
|
VC OUTPUT CIRCUIT | |
|
FUEL PUMP CONTROL CIRCUIT | |
|
ECM | |
| Engine cranks normally (difficult to start) |
|
FUEL PUMP CONTROL CIRCUIT |
|
ON-VEHICLE INSPECTION | |
| Cold engine (difficult to start) |
|
DTC P0617 STARTER RELAY CIRCUIT HIGH |
|
FUEL PUMP CONTROL CIRCUIT | |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
| Hot engine (difficult to start) |
|
DTC P0617 STARTER RELAY CIRCUIT HIGH |
|
FUEL PUMP CONTROL CIRCUIT | |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
| High engine idle speed |
|
COMPRESSOR CIRCUIT |
|
ECM POWER SOURCE CIRCUIT | |
|
ECM POWER SOURCE CIRCUIT | |
|
IACV CONTROL CIRCUIT | |
|
- | |
| Low engine idle speed |
|
COMPRESSOR CIRCUIT |
|
FUEL PUMP CONTROL CIRCUIT | |
|
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH | |
|
IACV CONTROL CIRCUIT | |
|
- | |
| Rough idling |
|
ON-VEHICLE INSPECTION |
|
FUEL PUMP CONTROL CIRCUIT | |
|
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH | |
|
IACV CONTROL CIRCUIT | |
|
- | |
| Hunting (when idling) |
|
ECM POWER SOURCE CIRCUIT |
|
ECM POWER SOURCE CIRCUIT | |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
|
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH | |
|
IACV CONTROL CIRCUIT | |
|
- | |
| Hesitation / Poor acceleration (poor driveability) |
|
FUEL PUMP CONTROL CIRCUIT |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
| Surging (poor driveability) |
|
FUEL PUMP CONTROL CIRCUIT |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
| Engine stalls soon after starting |
|
FUEL PUMP CONTROL CIRCUIT |
|
ON-VEHICLE INSPECTION | |
|
ON-VEHICLE INSPECTION | |
|
FUEL INJECTOR | |
| Engine stalls during A/C operation |
|
COMPRESSOR CIRCUIT |
|
ECM | |
| Usable / difficult to refuel |
|
CANISTER |