SYSTEM SETUP & ANALYSIS

DIAGNOSTIC SERVICE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133 Service Codes List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

FLASHING PATTERNS OF ENGINE CHECK LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

DIAGNOSTIC SERVICE CODES Service Codes List Figure218

The error codes will be displayed on the instrument panel as a flashing light sequences on icon (Item 1) [Figure218].

See the following chart for the codes, the conditions and the flashing sequence.

Flash Examples: (4) 4 long flashes, (4-1) four long flashes followed by one short flash, (4-4) four long flashes followed by four short flash.

See [Figure218] for additional information on following the flashing code sequence.

1

P-86955A

FLASHES ITEM

4 Coolant temperature sensor failure 5 Accelerator sensor failure

6 Speed sensor failure

7 Rack position sensor failure

CONDITIONS OPERATION WHEN FAILURE OCCURS ACTION

Sensor voltage is 4.8V or more, or 0.2V or less. Engine runs with a coolant temperature of 30°C Correct failure.

Sensor voltage is 4.6V or more, or 0.2V or less.

Engine start signal (E8) is on, but the engine speed is zero. Engine speed decreases by 480 RPM or more in 40 ms

Correlation between rack actuator output and rack position exceeds threshold upper limit by 0.32 sec. or more. [Without optional backup accelerator sensor] Engine runs at 1500 RPM. (Option can change) [With optional backup accelerator sensor] Select backup accelerator sensor: No limitation Backup accelerator sensor failure: Engine runs at 1500 RPM. (Option can change) [With optional backup speed sensor] Backup speed sensor becomes active; speed is limited to 1800 RPM.(Option can change) Backup speed sensor failed: Engine stops. [Without optional backup speed sensor] Engine stops. Engine runs with limited output and speed. (Rack position control is inactive and speed control is active). Correct failure.

Turn key OFF.

Turn key OFF.

Correlation between rack actuator output and rack position exceeds threshold upper limit by 0.16 sec. or more.

8 Rack actuator failure

Rack actuator current is too high.Engine stops. Turn key Rack actuator current is too low. OFF. Engine accelerates with minimum rack actuator output Engine stalls while rack position sensor is failed. 9 Over speed Idling engine speed exceeds high idling speed plus 600 RPM. Engine stops. Turn key OFF.

1-1 Backup speed sensor failure Engine start signal (E8) is on, but the engine speed is zero. Engine speed decreases by 480 RPM or more in 40ms. Engine continues to run while main speed sensor is used. Backup speed sensor failed: Engine stops. Turn key OFF.

1-2 CAN communication failure CAN communication packets cannot be received.

1-3 EGR valve failure Low status is detected even though port is off.

1-4 CSD solenoid valve failure High status is detected even though port is on. High status is detected even though port is off. Low status is detected even though port is on.

1-5 Air heater relay failure High status is detected even though port is off.

1-6 Main relay failure Low status is detected even though port is on. Power is not shut off even though main relay is off. Last value is retained. Backup sensor becomes active. Correct failure.

Engine runs with limited output (92%) and speed (1800 RPM) Turn key OFF.

Engine continues to run with port being off.Turn key OFF.

Engine runs with air heater relay being off.Turn key OFF.

Engine runs normally. Correct failure. Or turn key OFF.

1-7 Rack actuator relay failure

1-8 Backup accelerator sensor failure

1-9 Atmospheric pressure sensor failure 2-1 Oil pressure switch failure 2-2 Charge switch failure Low status is detected even though port is off. High status is detected even though port is on. Sensor voltage is 4.6V or more, or 0.2V or less.

Sensor voltage is 4.6V or more, or 0.2V or less. Engine stops. Turn key OFF.

Engine continues to run while main accelerator sensor is used. Main accelerator sensor failure: Engine runs at 1500 RPM. (Option can change) Atmospheric pressure compensation is canceled. Correct failure.

Turn key OFF.

Oil pressure switch fails to turn on when engine is off. Charge switch fails to turn on when engine is off. Engine runs normally. (Option can change)Turn key OFF. Engine runs normally. Turn key OFF.

2-3 Power supply voltage abnormal E-ECU supply voltage exceeds 10.0V. E-ECU supply voltage exceeds 16.0V. Engine runs normally. Correct failure.

2-4 Sensor 5V failure Monitoring voltage is approx. 0 V.Engine runs normally. Turn key Monitoring voltage is 4.5 V or less. OFF. Monitoring voltage is 5.5 V or more.

2-5 E-ECU overheat alarm E-ECU temperature exceeds 105°C. Alarm is canceled when E-ECU temperature decreases to 100°C. (option can change)

3-1 Oil pressure low

Oil pressure switch fails to turn off when engine is running. 3-2 Charge failureCharge switch fails to turn off when engine is running.

3-3 Coolant temperature abnormal Coolant temperature switch turns on. Engine runs normally. (Option can change)Correct failure.

Engine runs normally. (Option can change)Correct failure. Engine runs normally. Turn key OFF. Engine runs normally. (Option can change)Turn key OFF.

3-4 Air cleaner blockage alarm 3-5 Oily water separator alarm 3-6 Coolant temperature high alarm

4-1 E-ECU failure [ROM error] 4-1 E-ECU failure [EEPROM error] 4-1 E-ECU failure [EEPROM failure] 4-1 E-ECU failure [Mapping error] 4-1 E-ECU failure [E-ECU temperature sensor failure] Air cleaner switch turns on. Engine runs normally. (Option can change)Turn key OFF.

Oily water separator switch turns on. Engine runs normally. (Option can change)Turn key OFF.

Coolant temperature is 115°C or higher. alarm is canceled when Coolant temperature decreases to 110°C. (Option can change) Flash ROM suffers checksum error. Engine runs normally. Correct failure.

Engine stops. Turn key OFF. Reading /Writing fails. Engine runs normally. Turn key EEPROM suffers checksum error. OFF.

E-ECU fails to communicate with sub CPU. Engine runs normally. Turn key OFF.

Map format is invalid. Engine stops. Turn key OFF.

Sensor voltage is 4.6V or more, or 1.0V or less. Engine runs normally. Correct failure.

When detecting these failures, the E-ECU (Engine control unit) flashes the engine check lamp to alert the operator to the occurrence of failure conditions. The engine check lamp will illuminate for 2 sec. when the E-ECU is power on. This allows checking if the E-ECU is supplied with power normally.

Flashing patterns of the engine check lamp are shown in [Figure218]. When accelerator sensor failure (flashing 5 time) and EGR valve failure (flashing 1-3 times) occur, the engine check lamp flashes as shown in [Figure218]. When two or more failures have occurred simultaneously, the engine check lamp scrolls through all the failure modes, then repeats.

Figure 219