SYSTEM SETUP & ANALYSIS

DIAGNOSTIC SERVICE CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129 Service Codes List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

FLASHING PATTERNS OF ENGINE CHECK LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

Service Codes List

Figure220

2

1

The error codes will be displayed on the instrument panel as a flashing light sequences on icon (Item 1) [Figure220].

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 [Figure 221] for additional information on following the flashing code sequence.

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 seconds or more. [Without optional back-up accelerator sensor] Engine runs at 1500 rpm. (Option can change) [With optional back-up accelerator sensor] Select back-up accelerator sensor: No limitation Back-up accelerator sensor failure: Engine runs at 1500 rpm. (Option can change) [With optional back-up speed sensor] Back-up speed sensor becomes active; speed is limited to 1800 rpm.(Option can change) Back-up speed sensor failed: Engine stops. [Without optional back-up 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 seconds 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 Back-up speed sensor failure

1-2 CAN communication failure Engine start signal (E8) is on, but the engine speed is zero. Engine speed decreases by 480 rpm or more in 40ms. CAN communication packets cannot be received. Engine continues to run while main speed sensor is used. Back-up speed sensor failed: Engine stops.

Last value is retained. Back-up sensor becomes active. Turn key OFF.

Correct failure.

1-3 EGR valve failure

1-4 CSD solenoid valve failure

1-5 Air heater relay failure

1-6 Main relay failure Low status is detected even though port is off. 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. High status is detected even though port is off. Low status is detected even though port is on. Power is not shut off even though main relay is off.

1-7 Rack actuator relay failure

1-8 Back-up accelerator sensor 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.

1-9 Atmospheric pressure sensor failure Sensor voltage is 4.6V or more, or 0.2V or less.

2-1 Oil pressure switch failure 2-2 Charge switch failure 2-3 Power supply voltage abnormal Oil pressure switch fails to turn on when engine is off. Charge switch fails to turn on when engine is off. E-ECU supply voltage exceeds 10.0V. E-ECU supply voltage exceeds 16.0V. 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. 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.

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

3-1 Oil pressure lowOil pressure switch fails to turn off when engine is running. Engine runs normally. (Option can change) Correct failure.

3-2 Charge failure Charge switch fails to turn off when engine is running. Engine runs normally. Turn key OFF.

3-3 Coolant temperature abnormal Coolant temperature switch turns on. 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] 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) Engine runs normally. Correct failure.

Flash ROM suffers checksum error.

Engine stops. Turn key OFF. Reading /Writing fails. Engine runs normally. Turn key EEPROM suffers checksum OFF. 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] 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 seconds 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 [Figure 221]. When accelerator sensor failure (flashing 5 time) and EGR valve failure (flashing 1 - 3 times) occur, the engine check lamp flashes as shown in [Figure 221]. When two or more failures have occurred simultaneously, the engine check lamp scrolls through all the failure modes, then repeats.

Figure 221