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Quick Diagnostic Chart

X: Applied

TROUBLESHOOTING PART DESCRIPTION

Troubleshooting item Starter motor malfunction (Mechanical or electrical) Starter circuit including ignition switch is open Starter relay or related circuit malfunction Improper engine oil level Low or dead battery Charging system malfunction Improper engine compression Improper valve timing Hydrolocked engine Improper engine oil viscosity Improper dipstick Base engine malfunction Flywheel (MTX)/Drive plate (ATX) is seized Improper tension or damaged drive belts Improper engine coolant level Water and anti-freeze mixture is improper Cooling system malfunction (Radiator, hoses, overflow system, thermostat etc.) Cooling fan system malfunction
1 Blown fuses                                    
2 Check engine light illuminates                                    
3 Will not crank X X X   X X     X       X          
4 Hard to start/long crank/erratic start/erratic crank X                               X  
5 Engine stalls After start/at idle             X X                    
6 Cranks normally but will not start             X X                    
7 Slow return to idle                                 X  
8 Engine runs rough/rolling idle             X X                    
9 Fast idle/runs on                                    
10 Low idle/stalls during deceleration                                    
11 Engine stalls/quits Acceleration/cruise             X X                    
Engine runs rough Acceleration/cruise             X X                    
Misses Acceleration/cruise             X X                    
Buck/jerk Acceleration/cruise/deceleration             X X                    
Hesitation/stumble Acceleration             X X                    
Surges Acceleration/cruise             X X                    
12 Lack/loss of power Acceleration/cruise             X X                    
13 Knocking/pinging Acceleration/cruise             X                   X  
14 Poor fuel economy             X X                 X  
15 Emission compliance             X X       X         X  
16 High oil consumption/leakage                   X X X            
17 Cooling system concerns Overheating                           X X X X X
18 Cooling system concerns Runs cold                                 X X
19 Exhaust smoke             X         X         X  
20 Fuel odor (in engine compartment)                                    
21 Engine noise       X               X   X        
22 Vibration concerns (engine)                           X        
23 A/C does not work sufficiently                                    
24 A/C is always on or A/C compressor runs continuously                                    
25 A/C is not cut off under wide open throttle conditions                                    
26 Exhaust sulphur smell                                    
27 Fuel refill concerns                                    
28 Fuel filling shut off concerns                                    
29 Spark plug condition             X                      
30 ATX concerns Upshift/downshift/engagement (See SYMPTOM TROUBLESHOOTING ITEM TABLE [FS5A-EL] .)

X: Applied

TROUBLESHOOTING PART DESCRIPTION

Troubleshooting item Engine and transaxle mounts are improperly installed Cooling fan sheet is improperly installed Cruise control system operation improperly (Vehicles with cruise control system) Fuel quality Variable valve timing system malfunction Variable tumble system malfunction Engine overheating Air cleaner element clogged Air leakage from intake-air system (Loose tubes, cracks breakage) Intake air temperature is too hot Idle learning of drive-by-wire control system is not completed Drive-by-wire control system improper operation Throttle body malfunction (stuck open or close, restriction) Drive-by-wire control system operates with brake override system Variable intake-air system malfunction Vacuum leakage (vacuum hose damage, misrouting) Ignition coil malfunction (e.g. open, short or cracks) Initial ignition timing misadjustment (CKP sensor and crankshaft pulley misadjustment) Spark plug malfunction
1 Blown fuses                                      
2 Check engine light illuminates         X X           X              
3 Will not crank                                      
4 Hard to start/long crank/erratic start/erratic crank       X     X X X     X       X X X X
5 Engine stalls After start/at idle       X X     X X     X       X X X X
6 Cranks normally but will not start       X X     X X     X       X X   X
7 Slow return to idle                 X       X            
8 Engine runs rough/rolling idle       X X   X   X   X X X     X X   X
9 Fast idle/runs on                 X     X X            
10 Low idle/stalls during deceleration                 X     X       X      
11 Engine stalls/quits Acceleration/cruise     X X X X X X X     X X     X     X
Engine runs rough Acceleration/cruise       X X X X X X     X X     X     X
Misses Acceleration/cruise X     X X X X X X     X X     X     X
Buck/jerk Acceleration/cruise/deceleration X     X X X X X X     X X X   X     X
Hesitation/stumble Acceleration X     X X X X X X     X X X   X     X
Surges Acceleration/cruise       X X X X X X     X X X   X     X
12 Lack/loss of power Acceleration/cruise       X X X X X X X   X X X X X     X
13 Knocking/pinging Acceleration/cruise       X     X                        
14 Poor fuel economy       X X X   X             X       X
15 Emission compliance               X X             X X   X
16 High oil consumption/leakage                                      
17 Cooling system concerns Overheating                                      
18 Cooling system concerns Runs cold                                      
19 Exhaust smoke               X                 X   X
20 Fuel odor (in engine compartment)                                      
21 Engine noise                 X             X      
22 Vibration concerns (engine) X X                                  
23 A/C does not work sufficiently                                      
24 A/C is always on or A/C compressor runs continuously                                      
25 A/C is not cut off under wide open throttle conditions                                      
26 Exhaust sulphur smell       X X                     X      
27 Fuel refill concerns                                      
28 Fuel filling shut off concerns                                      
29 Spark plug condition               X                     X
30 ATX concerns Upshift/downshift/engagement (See SYMPTOM TROUBLESHOOTING ITEM TABLE [FS5A-EL] .)

X: Applied

TROUBLESHOOTING PART DESCRIPTION

Troubleshooting item Erratic signal to ignition coil CKP sensor is damaged (e.g. open or short circuit) Crankshaft pulley is damaged Improper gap between CKP sensor and crankshaft Fuel pump malfunction (Mechanically or electrically) Pressure regulator malfunction Fuel hoses restriction or clogging Fuel injectors malfunction (Leakage or clogging, inoperative) Fuel leakage from fuel system (including insulator, fuel injector O-ring) Fuel filters restriction or clogging CMP sensor is damaged (e.g. open or short circuit) Camshaft is damaged Improper air/fuel ratio mixture control Exhaust system restriction or clogging Catalytic converter malfunction EGR system malfunction Fuel-filler cap malfunction EVAP control system malfunction Fuel into evaporative purge hose
1 Blown fuses                                      
2 Check engine light illuminates   X                 X   X            
3 Will not crank                                      
4 Hard to start/long crank/erratic start/erratic crank X X X X X X X   X X       X   X   X  
5 Engine stalls After start/at idle X X X X X X X X X         X   X   X  
6 Cranks normally but will not start X X X X X X X X X         X   X   X  
7 Slow return to idle                                      
8 Engine runs rough/rolling idle X X X X X X X X X X X X   X   X   X  
9 Fast idle/runs on                                      
10 Low idle/stalls during deceleration                                   X  
11 Engine stalls/quits Acceleration/cruise X X X X X X X X X X X X X X   X   X X
Engine runs rough Acceleration/cruise X X X X X X X X X X X X X X   X   X X
Misses Acceleration/cruise X X X X X X X X X X X X X X   X   X X
Buck/jerk Acceleration/cruise/deceleration X X X X X X X X X X X X X X   X   X X
Hesitation/stumble Acceleration X X X X X X X X X X X X X X   X   X X
Surges Acceleration/cruise X X X X X X X X X X X X X X   X   X X
12 Lack/loss of power Acceleration/cruise X X X X X X X X     X X   X   X   X  
13 Knocking/pinging Acceleration/cruise X       X X X                        
14 Poor fuel economy X       X X X     X       X          
15 Emission compliance X       X X X     X X X X X X X X X  
16 High oil consumption/leakage                                      
17 Cooling system concerns Overheating                                      
18 Cooling system concerns Runs cold                                      
19 Exhaust smoke X       X X X X   X X X              
20 Fuel odor (in engine compartment)         X X     X X               X  
21 Engine noise                           X          
22 Vibration concerns (engine)                                      
23 A/C does not work sufficiently                                      
24 A/C is always on or A/C compressor runs continuously                                      
25 A/C is not cut off under wide open throttle conditions                                      
26 Exhaust sulphur smell         X X X     X               X  
27 Fuel refill concerns                                      
28 Fuel filling shut off concerns                                      
29 Spark plug condition X       X X X X X       X X          
30 ATX concerns Upshift/downshift/engagement (See SYMPTOM TROUBLESHOOTING ITEM TABLE [FS5A-EL] .)

X: Applied

TROUBLESHOOTING PART DESCRIPTION

Troubleshooting item Check valve (two-way) malfunction PCV valve malfunction Non-return valve malfunction Fuel shut off valve malfunction Constant voltage supply circuit malfunction Nonreturn valve malfunction Fuel shut off valve malfunction Main relay malfunction (Mechanically or electrically) PCM or sensor GND circuit open or short ECT sensor malfunction TR switch misadjustment (ATX) TR switch malfunction (ATX) Neutral switch or related circuit malfunction (MTX) CPP switch or related circuit malfunction (MTX) Brake switch or related circuit malfunction MAP sensor or related circuit malfunction A/F sensor, HO2S or related circuit malfunction IAT sensor or related circuit malfunction BARO sensor or related circuit malfunction MAF sensor or related circuit malfunction KS or related circuit malfunction
1 Blown fuses                                          
2 Check engine light illuminates         X         X           X X X X X X
3 Will not crank                     X X                  
4 Hard to start/long crank/erratic start/erratic crank                 X                     X  
5 Engine stalls After start/at idle   X           X                          
6 Cranks normally but will not start               X                          
7 Slow return to idle                   X                      
8 Engine runs rough/rolling idle   X             X                     X  
9 Fast idle/runs on                   X   X X X              
10 Low idle/stalls during deceleration                   X   X X X X         X  
11 Engine stalls/quits Acceleration/cruise X X           X               X X   X X  
Engine runs rough Acceleration/cruise X X           X               X X   X X  
Misses Acceleration/cruise X X           X               X X     X  
Buck/jerk Acceleration/cruise/deceleration X X           X               X X     X  
Hesitation/stumble Acceleration X X           X               X X   X X  
Surges Acceleration/cruise X X           X               X X     X  
12 Lack/loss of power Acceleration/cruise   X                               X   X  
13 Knocking/pinging Acceleration/cruise                   X               X   X X
14 Poor fuel economy   X                                   X  
15 Emission compliance   X                             X        
16 High oil consumption/leakage   X                                      
17 Cooling system concerns Overheating                   X                      
18 Cooling system concerns Runs cold                   X                      
19 Exhaust smoke   X                                      
20 Fuel odor (in engine compartment)                                          
21 Engine noise                                          
22 Vibration concerns (engine)                                          
23 A/C does not work sufficiently                                          
24 A/C is always on or A/C compressor runs continuously                                          
25 A/C is not cut off under wide open throttle conditions                                          
26 Exhaust sulphur smell                                          
27 Fuel refill concerns     X X                                  
28 Fuel filling shut off concerns     X X                                  
29 Spark plug condition                   X             X     X  
30 ATX concerns Upshift/downshift/engagement (See SYMPTOM TROUBLESHOOTING ITEM TABLE [FS5A-EL] .)

X: Applied

TROUBLESHOOTING PART DESCRIPTION

Troubleshooting item TP sensor or related circuit malfunction APP sensor or related circuit malfunction Improper refrigerant charging amount Improper A/C system operation A/C compressor magnetic clutch malfunction Improper load signal input ATX related parts malfunction (ATX) Clutch slippage (MTX) VSS related circuit malfunction Improper ATF level (ATX) Brake dragging Low tire pressure Loose parts Improper balance of wheels and tires Drive line malfunction Suspension malfunction Instrument cluster malfunction Immobilizer system operating Immobilizer system or related circuit malfunction CAN communication error
1 Blown fuses                                        
2 Check engine light illuminates X X             X               X     X
3 Will not crank                                   X X  
4 Hard to start/long crank/erratic start/erratic crank                                        
5 Engine stalls After start/at idle X X X X                 X           X  
6 Cranks normally but will not start X X                                 X  
7 Slow return to idle                                        
8 Engine runs rough/rolling idle     X X                 X              
9 Fast idle/runs on   X       X                           X
10 Low idle/stalls during deceleration X X X X X       X       X             X
11 Engine stalls/quits Acceleration/cruise X X X X     X X X       X              
Engine runs rough Acceleration/cruise X X X X     X X X       X              
Misses Acceleration/cruise X X X X     X X X       X              
Buck/jerk Acceleration/cruise/deceleration X X X X     X X X       X              
Hesitation/stumble Acceleration X X X X     X X X       X              
Surges Acceleration/cruise X X X X     X X X       X              
12 Lack/loss of power Acceleration/cruise X X X X     X X X   X                  
13 Knocking/pinging Acceleration/cruise                                        
14 Poor fuel economy               X   X X X                
15 Emission compliance                                        
16 High oil consumption/leakage                                        
17 Cooling system concerns Overheating     X X                         X      
18 Cooling system concerns Runs cold       X                         X      
19 Exhaust smoke                                        
20 Fuel odor (in engine compartment)                                        
21 Engine noise                     X   X              
22 Vibration concerns (engine)                         X X X X        
23 A/C does not work sufficiently     X X X                              
24 A/C is always on or A/C compressor runs continuously       X X                              
25 A/C is not cut off under wide open throttle conditions   X                                    
26 Exhaust sulphur smell                                        
27 Fuel refill concerns                                        
28 Fuel filling shut off concerns                                        
29 Spark plug condition                                        
30 ATX concerns Upshift/downshift/engagement (See SYMPTOM TROUBLESHOOTING ITEM TABLE [FS5A-EL] .)
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