DTC P0691:00 [MZ-CD 1.6]
id0102g8069100
DTC P0691:00 |
Cooling fan control relay No.1 control circuit low |
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DETECTION CONDITION
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• The PCM monitors the cooling fan relay No.1 control signal. If the voltage at PCM terminal 312 remains low for 0.5 s. while the cooling fan relay No.1 control circuit is not actuated, the PCM determines that there is a cooling fan relay No.1 control circuit short to ground.
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POSSIBLE CAUSE
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• Cooling fan relay No.1 terminal malfunction
• Short to ground in the wiring harness between cooling fan relay No.1 terminal E and PCM terminal 312
• PCM connector or terminal malfunction
• PCM malfunction
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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INSPECT COOLING FAN RELAY NO.1 TERMINAL CONDITION
• Remove the cooling fan relay No.1.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminals, then go to Step 6.
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No
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Go to the next step.
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4
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INSPECT PCM CONNECTOR CONDITION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector and/or terminals, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT COOLING FAN RELAY NO.1 CONTROL SIGNAL CIRCUIT FOR SHORT TO GROUND
• Switch the ignition to off.
• Disconnect the cooling fan relay No.1 and PCM connectors.
• Inspect continuity between cooling fan relay No.1 terminal E (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace for a possible short to ground, then go to the next step.
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No
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Intermittent concern exists.
Go to the next step.
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6
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VERIFY THAT DTC P0691:00 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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7
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VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
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No
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DTC troubleshooting completed.
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