[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION CHART FOR TROUBLE SYMPTOMS | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION CHART FOR TROUBLE SYMPTOMS
Items | Trouble symptom | Inspection procedure No.
--- | --- | ---
Communication with MUT-II/III is impossible | Communication with all system is not possible | 1
Communication with engine-A/T-ECU only is not possible | 2
Engine warning lamp | The engine warning lamp does not illuminate right after the ignition switch is turned the "ON" position | 3
The engine warning lamp remains illuminating and never goes out | 4
Starting | Starting impossible (No initial combustion) | The starter is impossible to operate. | 5
Starting impossible (Starter operative but no initial combustion) | The starter is operative and cranks the engine, but none of initial combustion is in the cylinders and the engine is not started. | 6
Starting impossible (Initial combustion but no complete combustion) | The initial combustion occurs, but the engine stalls soon due to the incomplete combustion. | 7
Improper starting (Long time to start) | It is long cranking to start the engine.
Improper idling | Unstable idling (Rough idling, hunting) | The engine speed is not constant and changeable during the idling. Usually, the judgment can be based on the movement of the tachometer pointer, also on the vibration transmitted to the steering wheel, sift lever, vehicle body and so on. | 8
Improper idling speed | The proper idling speed is not satisfied.
Engine stalled during idling (Die out) | The engine stalls during the idling in no relation to the vehicle movement.
Engine stalls | The engine stalls when starting the car (Pass out) | The engine stalls during the operation, or when the accelerator pedal is depressed from the idling. | 9
The engine stalls when decelerating | The engine stalls at the deceleration. | 10
Driving | Engine does not revolve up | The engine speed is not higher when the accelerator pedal is depressed. | 11
Hesitation, sag | The response of vehicle speed (engine speed) is delayed when the accelerator pedal is depressed, or the vehicle speed (engine speed) is temporarily dropped during the acceleration. These phenomena are called "hesitation" and the serious hesitation is called "sag". | 12
Poor acceleration | The engine cannot obtain the acceleration corresponding to the degree of throttle opening although the engine is smooth at the constant speed.
Stumble | The engine speed increase is delayed when the accelerator pedal is initially depressed at the starting.
Surge | The vehicle body is repeated to vibrate jollity in the forward and backward directions at the constant speed or acceleration.
The feeling of impact or vibration when accelerating | The large impact feeling occurs at the acceleration. | 13
The feeling of impact or vibration when decelerating | The large impact feeling occurs at the deceleration. | 14
Knocking | Sharp sound like a hammer striking on the cylinder walls during the driving can be heard and wrongly affects the driving. | 15
Ignition timing offset | The basic ignition timing is deviated from the datum value. | 16
Stopping | Run on (Dieseling) | The engine continues to run after the ignition switch is in "LOCK (OFF)" position. | 17
Exhaust gas | Odor, white smoke, black smoke, high-concentration CO/HC during idling | The exhaust gas is extremely rank odor, white smoke or black smoke. The concentration of CO & HC is high during the idling. | 18
Charging performance | Battery rundown | The battery is soon rundown or the charging ability of battery is small. | 19
Cooling performance | Overheating | The temperature of engine cooling water is extremely high. | 20
Abnormal rotation of fan Motor | The fan motor is abnormally rotated when the ignition switch is in "ON" position in no relation to the engine cooling water temperature. | 21
A/C performance | Poor A/C Performance | The temperature of air cooling from A/C is not efficient or very far from the target temperature. | 22
PROBLEM SYMPTOMS TABLE
Inspection procedure No. | Trouble symptom | Reference page
--- | --- | ---
1 | Communication with all system is not possible |
2 | Communication with engine-A/T-ECU only is not possible |
3 | The engine warning lamp does not illuminate right after the ignition switch is turned the "ON" position |
4 | The engine warning lamp remains illuminating and never goes out |
5 | Starting impossible (No initial combustion) |
6 | Starting impossible (Starter operative but no initial combustion) |
7 | Starting impossible (Initial combustion but no complete combustion) |
Starting impossible (Long time to start)
8 | Unstable idling (Rough idling, hunting) |
Improper idling speed (Too high or too low)
Engine stalls during idling (Die out)
9 | The engine stalls when starting the car (pass out) |
10 | The engine stalls when decelerating |
11 | Engine does not revolve up |
12 | Hesitation, sag |
Poor acceleration
Stumble
Surge
13 | The feeling of impact or vibration when accelerating |
14 | The feeling of impact or vibration when decelerating |
15 | Knocking |
16 | Ignition timing offset |
17 | Run on (Dieseling) |
18 | Odor, white smoke, black smoke, high-concentration CO/HC during idling |
19 | Battery rundown |
20 | Overheating |
21 | Abnormal rotation of fan motor |
22 | Poor A/C performance |
23 | Engine-A/T-ECU power supply, engine control relay, ignition switch-IG1 system |
24 | Fuel pump system |
25 | Fan control relay system |
26 | A/C switch system |
27 | A/C compressor relay system |
28 | A/C load signal system |
29 | A/C pressure sensor system |
30 | Ignition circuit system |
31 | Accelerator pedal position switch circuit system |

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION CHART FOR TROUBLE SYMPTOMS | PRINT PAGE / INDEX / PRIOR / NEXT

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