DTC P0691 COOLING FAN 1 CONTROL CIRCUIT LOW
|
|
DTC P0691 COOLING FAN 1 CONTROL CIRCUIT
LOW
|
Detect the open or short circuit of the radiator
fan circuit.
Judge NG when the ECM output level differs
from the actual terminal level.
|
Secondary
Parameters
|
Enable
Conditions
|
None
|
|
Always perform the diagnosis continuously.
Abnormality Judgment
Judge NG when the cumulative time of completing
the malfunction criteria below becomes more than 2.5 seconds.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
After
starting the engine
|
1
seconds or more
|
Engine
speed
|
≥ 500
rpm
|
Ignition
switch
|
ON
|
Battery
voltage
|
≥ 10.9
V
|
Terminal
voltage level when ECM transmits OFF signal
|
Low level
|
Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
Normality Judgment
Judge OK and clear NG when the malfunction
criteria below are completed.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
After
starting the engine
|
1
seconds or more
|
Engine
speed
|
≥ 500
rpm
|
Ignition
switch
|
ON
|
Battery
voltage
|
≥ 10.9
V
|
Terminal
voltage level when ECM transmits OFF signal
|
High level
|
|
•
|
When the OK idling cycle was completed 40 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
|
|
•
|
When the OK driving cycle was completed 3 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
None
|
ECM OPERATION
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
