IGNITION SWITCH EXPRESSION
The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.
|Expression||Ignition Switch (position)||Engine Switch (condition)|
|Ignition Switch off||Lock||Off|
|Ignition Switch ON||ON||On (IG)|
|Ignition Switch ACC||ACC||On (ACC)|
INITIALIZATION AND REGISTRATION
If the ECM is replaced, register the ECU communication ID for Engine Immobiliser System (w/o Entry and Start System) (Refer to the Service Bulletin for Registration).
When the cable is disconnected from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected.
|System Name||See Procedure|
|Stop and Start System|
|Simple Intelligent Parking Assist System|
|Power Door Lock Control System|
When replacing the ECM and/or any other components in the following chart, perform the corresponding utility items on the GTS.
When the ECM and other component(s) are replaced at the same time, perform the following utility items by following the instructions shown on the GTS display, starting with the ECM.
|Replacement Part||Utility Item|
|No. 1 crankshaft position sensor plate||
Crank Time Compensation Reset
|Air fuel ratio sensor||
A/F Sensor Compensation Reset
Supply pump assembly
Suction control valve
Supply Pump Initialization
|Exhaust manifold converter sub-assembly (DPF catalyst)||
Catalyst Record Clear
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.
CATALYST RECORD OF DPF THERMAL DETERIORATION
The ECM stores the history data of DPF catalyst thermal deterioration. This data is updated continuously and is then converted to an 8-digit code and is stored in the EEPROM. If the ECM determines that replacement of the DPF catalyst is required based on the thermal deterioration data, the DTC is stored to inform the driver.
When only the DPF catalyst is replaced.
After replacing the DPF catalyst, clear the thermal deterioration data stored in the ECM.
When only the ECM is replaced.
After replacing the ECM, input the original thermal deterioration data stored before replacement.
Read the thermal deterioration data stored in the ECM before replacement, and store the data in the GTS.
If the thermal deterioration data cannot be read, be sure to replace the DPF catalyst with a new one and initialize the ECM.
After replacing both the DPF catalyst and the ECM, clear the thermal deterioration data stored in the new ECM.
Clearing the thermal codes is required because initialization codes are stored in a new ECM. Failure to do this will cause a DTC to be stored.
INJECTOR COMPENSATION CODE
Each injector assembly has different fuel injection characteristics. In order to optimize fuel injection performance, the ECM compensates for these differences by adjusting the fuel injection duration of each injector according to its compensation code. Injector compensation codes are unique, 30-digit, alphanumeric values printed on the head portion of each injector assembly.
If an incorrect injector compensation code is input into the ECM, the engine may rattle or engine idling may become rough. In addition, engine failure may occur and the life of the engine may be shortened.
PILOT QUANTITY LEARNING
By performing "Pilot Quantity Learning", the injection volume for each cylinder is precisely adjusted so that the engine runs smoothly. The "Pilot Quantity Learning" information is stored in the EEPROM of the ECM.
If an incorrect pilot quantity learning value is input into the ECM, the engine may rattle or engine idling may become rough.
DIFFICULT TO START ENGINE, ENGINE STALLING, BLACK SMOKE EMITTED ROUGH IDLING, EXCESSIVE ENGINE VIBRATION, ENGINE KNOCKING, LACK OF POWER OR HESITATION
Check if the customer problem is described below. If so, refer to the appropriate troubleshooting section.
Engine is difficult to start or stalls.
Black smoke is emitted.
Rough idling or excessive engine vibrations.
Engine knocking or rattling.
Lack of power or hesitation.
WHEN USING GTS
Observe the following items for safety reasons:
Before using the GTS, read the instruction manual.
Prevent the GTS cable from being caught on the pedals, shift lever or steering wheel when driving with the GTS connected to the vehicle.
When driving the vehicle for testing purposes using the GTS, two persons are required. One is for driving the vehicle, and the other operates the GTS.