INSPECTION CHART FOR TROUBLE SYMPTOMS


Item
 Trouble Symptom
 Inspection Procedure No.
Communication with M.U.T.-III is impossible
 Communication between M.U.T.-III and engine-ECU is not possible.
 1
Engine warning lamp
 The engine warning lamp does not illuminate right after the ignition switch is turned to the "ON" position.
 2
The engine warning lamp remains illuminating and never goes out.
 3
Starting
 Starting impossible (starter not operative)
 The starter is not operable.
 4 *1, 5 *2
Starting impossible
(starter operative but no initial combustion)
 The starter is operative and cranks the engine, but no initial combustion occurs in the cylinders to start the engine.
 6
Starting impossible (initial combustion but no complete combustion)
 Initial combustion occurs, but the engine stalls soon due to the incomplete combustion.
 7
Improper starting (long time to start)
 The engine starts, but it takes too long for cranking.
Improper idling
 Unstable idling
(rough idling, hunting)
 The engine speed is not constant and fluctuates during the idling. Usually, this malfunction can be judged from the shaking tachometer pointer or vibrations transmitted to the steering wheel, shift lever, vehicle body and so on.
 8
Improper idling speed (too high or too low)
 The idling speed is not within the normal range.
Engine stalls 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 when the accelerator pedal is depressed in the idling speed, or during the operation.
 9
The engine stalls when decelerating
 The engine stalls at the deceleration.
Driving
 Engine does not revolve up
 The engine speed does not increase even when the accelerator pedal is depressed.
 10
Hesitation, sag

 The response of vehicle speed (engine speed) is delayed when the accelerator pedal is depressed to accelerate vehicle speed, or the vehicle speed (engine speed) is temporarily dropped during the acceleration.
This phenomenon is called "hesitation" and a serious hesitation is called "sag".
 11
Poor acceleration
 The engine operates smoothly at a constant-speed run, but the vehicle does not accelerate properly as the throttle valve opening changes. In addition, vehicle will not run in the specified maximum speed.
Stumble
 The engine speed increase is delayed when the accelerator pedal is initially depressed at the starting.
Surge
 At a constant-speed or acceleration the vehicle is subject to repeated jerking (in terms of the drive speed) in the driving direction.
The feeling of impact or vibration when accelerating
 The driver feels a sudden impact when the vehicle is accelerated.
 12
The feeling of impact or vibration when decelerating
 The driver feels a sudden impact when the vehicle is decelerated.
 13
Knocking
 Sharp sound like a hammer striking on the cylinder walls during the driving can be heard and wrongly affects the driving.
 14
Ignition timing deviation
 The basic ignition timing is deviated from the datum value.
 15
Stopping
 Run on (dieseling)
 The engine continues to run after the ignition switch is in "LOCK " (OFF) position.
 16
Exhaust gas
 Odour, white smoke, black smoke and high-concentration CO/HC during idling.
 The exhaust has an abnormal odour. Either white or black exhaust gas comes out. The concentration of CO & HC is high during the idling.
 17
Charging performance
 Battery run down
 The battery is soon rundown.
Or, the charging ability of battery is small.
 18
Cooling performance
 Overheating
 The temperature of engine cooling water is extremely high.
 19
ECO mode indicator
 In running, the ECO mode indicator shows nothing.
 20
note *1: M/T - Vehicles without AS&G
note *2: M/T - Vehicles with AS&G, CVT

PROBLEM SYMPTOMS TABLE


warning When touching the throttle valve, surely shut off the driving circuits of the throttle valve. In the event that the throttle valve is operated, a finger might be injured as the result of being caught by the throttle valve.
caution During troubleshooting if the ignition switch is turned to ON with the connectors, etc. disconnected, some diagnosis code may be saved in other system. After the troubleshooting is completed, always make sure the diagnosis codes of the entire systems. If it is found that some diagnosis codes have been set, erase them.
note When the racing (2,000 to 5,000 r/min or more) continues on the vehicle stopped with no load during the specified time or more, the increase in the engine speed might be limited. This comes from the engine protection and control functions and is not a malfunction.
Inspection Procedure No.
 Inspection Item
 Reference Page
1
 Communication with engine-ECU is not possible
2
 The engine warning lamp does not illuminate right after the ignition switch is turned to the "ON" position
3
 The engine warning lamp remains illuminating and never goes out
4
 Starting impossible (starter not operative) <M/T - Vehicles without AS&G>
5
 Starting impossible (starter not operative) <M/T - Vehicles with AS&G>
 Refer to GROUP 17 - Auto Stop & Go (AS&G) System <M/T> - Symptom Chart
Starting impossible (starter not operative) <CVT>
 Refer to GROUP 17 - Auto Stop & Go (AS&G) System <CVT> - Symptom Chart
6
 Starting impossible (starter operative but no initial combustion)
7
 Starting impossible (initial combustion but no complete combustion)
Improper starting (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)
The engine stalls when decelerating
10
 Engine does not revolve up
11
 Hesitation, sag
Poor acceleration
Stumble
Surge
12
 The feeling of impact or vibration when accelerating
13
 The feeling of impact or vibration when decelerating
14
 Knocking
15
 Ignition timing deviation
16
 Run on (dieseling)
17
 Odour, white smoke, black smoke and high-concentration CO/HC during idling
18
 Battery run down
19
 Overheating
20
 In running, the ECO mode indicator shows nothing <Vehicles with ECO mode indicator>
21
 Engine-ECU power supply, engine control relay, ignition switch-IG1 system
22
 Fuel pump system
23
 A/C compressor relay system
24
 Ignition circuit system
25
 Oil pressure switch system