DTC detecting condition | Trouble area |
---|---|
DTC P0601:
Data write error or check sum error (1 driving cycle detection logic) DTC P0602: Data programming error (1 driving cycle detection logic) |
ECM |
Step | Action | YES | NO |
---|---|---|---|
1 |
DTC recheck
1)
Clear DTC referring to
DTC Clearance:M13A with VVT
.
2)
Turn OFF ignition switch.
3)
Turn ON ignition switch and check DTC.
Is DTC P0601 or P0602 still indicated?
|
Go to Step 2.
|
Intermittent trouble. Check for intermittent referring to
Intermittent and Poor Connection Inspection
.
|
2 |
ECM power and ground circuit check
1)
Check that ECM power supply circuit and ECM ground circuit are in good condition referring to
MIL Does Not Light with Ignition Switch ON and Engine Does Not Start Though It Is Cranked Up:M13A with VVT
.
Are checking results OK?
|
Substitute a known-good ECM and recheck.
|
Repair ECM power or ground circuit.
|