ENGINE CONTROL MODULE MAIN PROCESSOR MALFUNCTION CIRCUIT
Refer to Inspection Procedure - Power Supply System and Ignition Switch-IG System
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CIRCUIT OPERATION
Refer to Inspection Procedure - Power Supply System and Ignition Switch-IG System
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TECHNICAL DESCRIPTION
The ECM check whether the microcomputer, which performs the drive control of the throttle valve and injector (high pressure), is normal.
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
DTC SET CONDITIONS <Processor error>
Check Condition
- Ignition switch is "ON" position.
Judgment Criterion
- No surveillance pulse signals is inputted for 0.5 second.
DTC SET CONDITIONS <Direct injection driver communication error (ECM and IC)>
Check Condition
- Ignition switch is "ON" position.
- Battery positive voltage is between 10 and 16.5 volts.
Judgment Criterion
- When communication error between the microcomputer and the direct fuel injection injector driver continues.
FAIL-SAFE AND BACKUP FUNCTION
- Throttle opening degree position is in default position.
OBD-II DRIVE CYCLE PATTERN
- Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
- MFI relay failed.
- Shorted MFI relay circuit or connector damage.
- Open or shorted ignition switch-IG circuit, harness damage or connector damage.
- ECM failed.