SYMPTOM DIAGNOSTIC INDEX [13B-MSP]


id0103f2800500

•  Confirm trouble symptom using the following diagnostic index, then go to the applicable troubleshooting char.

Diagnostic Index

No.

TROUBLESHOOTING ITEM

DESCRIPTION

PAGE

1
Melting of main or other fuses
2
MIL illuminates
The MIL is illuminated incorrectly.
3
Will not crank
The starter does not work.
4
Hard to start/long crank/erratic start/erratic crank
The starter cranks engine at the normal speed but the engine requires excessive cranking time before starting.
The battery is in the normal condition.
5
Engine stalls
After start/at idle
Engine stops unexpectedly.
6
Cranks normally but will not start
The starter cranks the engine at normal speed but the engine will not run.
Refer to the symptom troubleshooting "No.5 Engine stalls" if this symptom appears after engine stall.
The fuel is in the tank.
The battery is in normal condition.
7
Slow return to idle
The engine takes more time than normal to return to idle speed.
8
Engine runs rough/rolling idle
The engine speed fluctuates between the specified idle speed and a lower speed, and the engine shakes excessively.
The idle speed is too slow and the engine shakes excessively.
9
Fast idle/runs on
The engine speed continues at fast idle after warm-up.
The engine runs after the ignition switch is turned off.
10
Low idle/stalls during deceleration
The engine stops unexpectedly at the beginning of deceleration or recovery from deceleration.
11
Engine stalls/quits
Acceleration/cruise
The engine stops unexpectedly at the beginning of acceleration or during acceleration.
The engine stops unexpectedly while cruising.
Engine runs rough
Acceleration/cruise
The engine speed fluctuates during acceleration or cruising.
Misses
Acceleration/cruise
The engine misses during acceleration or cruising.
Buck/jerk
Acceleration/cruise/ deceleration
The vehicle bucks/jerks during acceleration, cruising, or deceleration.
Hesitation/stumble
Acceleration
The momentary pause at the beginning of acceleration or during acceleration.
Surges
Acceleration/cruise
The momentary minor irregularity in engine output.
12
Lack/loss of power
Acceleration/cruise
The performance is poor under load (e.g. power down when climbing hills).
13
Knocking/pinging/detonation
Acceleration/cruise
A sound is produced when the air/fuel mixture is ignited by something other than the spark plug (e.g. hot spot in combustion chamber).
14
Poor fuel economy
The fuel economy is unsatisfactory.
15
Emission compliance
Fails emissions test.
16
High oil consumption/leakage
The oil consumption is excessive.
17
Cooling system concerns
Overheating
The engine runs at higher than normal temperature/overheats.
18
Cooling system concerns
Runs cold
The engine takes excessive time to reach the normal operating temperature.
19
Exhaust smoke
Blue, black, or white smoke from the exhaust system.
20
Fuel odor (in engine compartment)
Gasoline fuel odor or visible leakage.
21
Engine noise
Engine noise from under the hood.
22
Vibration concerns (engine)
Vibration from under hood or driveline.
23
A/C does not work sufficiently
The A/C compressor magnetic clutch does not engage when the A/C switch is turned on.
24
A/C is always on or A/C compressor runs continuously
The A/C compressor magnetic clutch does not disengage.
25
A/C is not cut off under wide open throttle conditions
The A/C compressor magnetic clutch does not disengage under wide open throttle.
26
Exhaust sulphur smell
Rotten egg smell (sulphur) from exhaust.
27
Spark plug condition
Incorrect spark plug condition.
28
AT concerns
Upshift/downshift engagement
AT concerns not related to engine performance.