Symptom Diagnostic Index
SYMPTOM DIAGNOSTIC INDEX
| No. | TROUBLESHOOTING ITEM | DESCRIPTION | PAGE | |
|---|---|---|---|---|
| 1 | Melting of main or other fuses | - | (See NO.1 MELTING OF MAIN OR OTHER FUSES .) | |
| 2 | MIL comes on | MIL is illuminated incorrectly. | (See NO.2 MIL COMES ON .) | |
| 3 | Will not crank | Starter does not work. | (See NO.3 WILL NOT CRANK .) | |
| 4 | Hard start/long crank/erratic start/erratic crank | Starter cranks engine at normal speed but engine requires excessive cranking time before starting. | (See NO.4 HARD START/LONG CRANK/ERRATIC START/ERRATIC CRANK .) | |
| 5 | Engine stalls | After start/at idle | Engine stops unexpectedly at idle and/or after start. | (See NO.5 ENGINE STALLS-AFTER START/AT IDLE .) |
| 6 | Cranks normally but will not start | Starter cranks engine at normal speed but engine will not run. | (See NO.6 CRANKS NORMALLY BUT WILL NOT START .) | |
| 7 | Slow return to idle | Engine takes more time than normal to return to idle speed. | (See NO. 7 SLOW RETURN TO IDLE .) | |
| 8 | Engine runs rough/rolling idle | Engine speed fluctuates between specified idle speed and lower speed and engine shakes excessively. | (See NO.8 ENGINE RUNS ROUGH/ROLLING IDLE .) | |
| 9 | Fast idle/runs on | Engine speed continues at fast idle after warm-up. Engine runs after ignition switch is turned off. |
(See NO.9 FAST IDLE/RUNS ON .) | |
| 10 | Low idle/stalls during deceleration | Engine stops unexpectedly at beginning of deceleration or recovery from deceleration. | (See NO.10 LOW IDLE/STALLS DURING DECELERATION .) | |
| 11 | Engine stalls/quits | Acceleration/cruise | Engine stops unexpectedly at beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising. | (See NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES .) |
| Engine runs rough | Acceleration/cruise | Engine speed fluctuates during acceleration or cruising. | ||
| Misses | Acceleration/cruise | Engine misses during acceleration or cruising. | ||
| Buck/jerk | Acceleration/cruise/deceleration | Vehicle bucks/jerks during acceleration, cruising, or deceleration. | ||
| Hesitation/stumble | Acceleration | Momentary pause at beginning of acceleration, or during acceleration | ||
| Surges | Acceleration/cruise | Momentary minor irregularity in engine output | ||
| 12 | Lack/loss of power | Acceleration/cruise | Performance poor under load (e.g. power down when climbing hills). | (See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE .) |
| 13 | Knocking/pinging | Acceleration/cruise | Sound is produced when air/fuel mixture is ignited by something other than spark plug (e.g. hot spot in combustion chamber). | (See NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE .) |
| 14 | Poor fuel economy | Fuel economy is unsatisfactory. | (See NO.14 POOR FUEL ECONOMY .) | |
| 15 | Emissions compliance | Fails emissions test | (See NO.15 EMISSION COMPLIANCE .) | |
| 16 | High oil consumption/leakage | Oil consumption is excessive. | (See NO.16 HIGH OIL CONSUMPTION/LEAKAGE .) | |
| 17 | Cooling system concerns | Overheating | Engine runs at higher than normal temperature/overheats. | (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING .) |
| 18 | Cooling system concerns | Runs cold | Engine does not reach normal operating temperature. | (See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD .) |
| 19 | Exhaust smoke | Blue, black, or white smoke from exhaust system | (See NO.19 EXHAUST SMOKE .) | |
| 20 | Fuel odor (in engine compartment) | Gasoline fuel smell or visible leakage | (See NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) .) | |
| 21 | Engine noise | Engine noise from under hood | (See NO.21 ENGINE NOISE .) | |
| 22 | Vibration concerns (engine) | Vibration from under hood or driveline | (See NO.22 VIBRATION CONCERNS (ENGINE) .) | |
| 23 | A/C does not work sufficiently | A/C compressor magnetic clutch does not engage when A/C is turned on. | (See NO.23 A/C DOES NOT WORK SUFFICIENTLY .) | |
| 24 | A/C always on or A/C compressor runs continuously. | A/C compressor magnetic clutch does not disengage. | (See NO.24 A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY .) | |
| 25 | A/C does not cut off under wide open throttle conditions. | A/C compressor magnetic clutch does not disengage under wide open throttle. | (See NO.25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS .) | |
| 26 | Exhaust sulphur smell | Rotten egg smell (sulphur) from exhaust | (See NO.26 EXHAUST SULPHUR SMELL .) | |
| 27 | Fuel refill concerns | Fuel tank does not fill smoothly. | (See NO.27 FUEL REFILL CONCERNS .) | |
| 28 | Fuel filling shut off issues | Fuel does not shut off properly. | (See NO.28 FUEL FILLING SHUT OFF ISSUES .) | |
| 29 | Constant voltage | Incorrect constant voltage | (See NO.29 CONSTANT VOLTAGE .) | |
| 30 | Spark plug condition | Incorrect spark plug condition | (See NO.30 SPARK PLUG CONDITION .) | |
| 31 | ATX concerns | Upshift/downshift/engagement | ATX concerns not related to engine performance | (See DIAGNOSTIC INDEX .) |