[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P0606 ENGINE-ECU MAIN PROCESSOR MALFUNCTION
Code No. P0606: Engine-ECU Main Processor Malfunction
 
 
 
 
OPERATION
  • Check Inspection Procedure - engine-ECU power supply, engine control relay, ignition switch-IG1 system (Refer to ).
 
 
FUNCTION
  • The engine-ECU check whether the microcomputer, which performs the drive control of the throttle valve and injector (high pressure), is normal.
 
 
TROUBLE JUDGEMENT
Check Condition
  • Ignition switch is "ON" position.
Judgement Criterion
  • A communication error between the microcomputer and the system LSI is detected.
Check Conditions
  • Ignition switch is "ON" position.
  • Battery positive voltage is more than 6.3 V.
Judgement Criterion
  • A failure of reference voltage for A/D convert is detected.
Check Condition
  • Ignition switch is "ON" position.
Judgement Criterion
  • The error counter of ROM exceeds 100 times.
Check Conditions
  • Ignition switch is "ON" position.
  • Battery backup voltage is more than 10 V and is less than 16.5 V.
Judgement Criterion
  • When communication error between the microcomputer and the direct injection injector driver continues.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Throttle opening degree position is in default position.
 
 
PROBABLE CAUSES
  • Failed engine control relay
  • Short circuit in the engine control relay circuit or loose connector contact.
  • Open/short circuit or harness damage in the ignition switch (IG1) circuit or loose connector contact.
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Check battery.
  • Battery check (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).
Is the check result normal?
Go to Step 2.
Replace the battery.
 
STEP 2. Perform voltage measurement at engine-ECU connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal IGN and body earth.
OK: System voltage
Is the check result normal?
Go to Step 3.
Repair the connector(s), or check and repair of open circuit, and short circuit in EIG1 to IGN line between ETACS-ECU connector and engine-ECU connector.
 
STEP 3. Check of damage in EIG1 to IGN line between ETACS-ECU connector and engine-ECU connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Check engine control relay itself.
  • Engine control relay continuity check (Refer to ).
Is the check result normal?
Go to Step 5.
Replace the engine control relay.
 
STEP 5. Check of short circuit in C/R line between engine control relay connector and engine-ECU connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. M.U.T.-IIISE diagnosis code
  • Reconfirmation of diagnosis code.
Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).