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.

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 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  After starting the engine	1 second or more
  Engine speed	"GREATER THAN EQUAL TO" 500 rpm
  Ignition switch	ON
  Battery voltage	"GREATER THAN EQUAL TO" 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 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  After starting the engine	1 second or more
  Engine speed	"GREATER THAN EQUAL TO" 500 rpm
  Ignition switch	ON
  Battery voltage	"GREATER THAN EQUAL TO" 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

• When the OK driving cycle was completed 3 times in a row
• When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)