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Component Description
NFEC1258
Malfunction Indicator Lamp (MIL) is located on the instrument panel. When the ignition switch is turned ON
without engine running, MIL will light up. This is a bulb check. When the engine is started, MIL should go off.
If MIL remains on, the on board diagnostic system has detected an engine system malfunction.
On Board Diagnosis Logic
NFEC1259
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0650
0650
Malfunction indicator
(MIL) control circuit
I An excessively high voltage is sent to ECM
through the MIL circuit under the condition
that calls for MIL light up.
I An excessively low voltage is sent to ECM
through the MIL circuit under the condition
that calls for MIL not to light up.
I Harness or connectors
(MIL circuit is open or shorted.)
I MIL
FAIL-SAFE MODE
ECM enters in fail-safe mode when both DTC P0650 and another DTC, which calls for MIL to light up, are
detected at the same time.
Detected items Engine operating condition in fail-safe mode
MIL circuit Engine speed will not rise more than 2,500 rpm due to the fuel cut.
DTC Confirmation Procedure
NFEC1260
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
SEF058Y
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-459.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0650 MIL (CIRCUIT)
Component Description
EC-457
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