DTC P0480 [MZ-CD 1.6 (Y6) (EURO4 emission level)]

id0102g6807400

DTC P0480

Cooling fan control performance problem
DETECTION CONDITION
•  If the PCM recognizes any of the following conditions concerning cooling fan control, the PCM determines that there is a malfunction in the cooling fan control.
―  Cooling fan speed which fan control module controls is detected six times to be slower than cooling fan speed which PCM requires
―  PCM cannot recognize trigger signal even though fan auto configuration conditions which PCM performs are met
―  Fan auto configuration which PCM performs fails
POSSIBLE CAUSE
•  Fan control module connector or terminal malfunction
•  Open circuit in wiring harness between following fan control module terminal and ground
―  Terminal 1A
―  Terminal 2A
•  Open circuit in wiring harness between the followings;
―  Battery positive post—fan control module terminal 1D
―  Fan control module terminal 1C—PCM terminal 318
•  Short to ground in wiring harness between FAN1/FAN2 fuse and cooling fan control module terminal 1D
•  PCM connector or terminal malfunction
•  Open circuit in wiring harness between fan control module terminal 1C and PCM terminal 318
•  Fan control module malfunction
•  Resistance of cooling fan rotation is excessive
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the following PENDING CODE/DTC also present?
•  P0480, P0691, P0692
Yes
Go to the applicable DTC inspection
(See DTC P0480 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC P0691 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC P0692 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
No
Go to the next step.
4
INSPECT FAN CONTROL MODULE CONNECTOR CONDITION
•  Switch the ignition to OFF.
•  Disconnect the fan control module connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
5
INSPECT FAN CONTROL MODULE GROUND CIRCUIT FOR OPEN
•  Disconnect battery negative terminal.
•  Fan control module component connector is disconnected.
•  Inspect for continuity between fan control module terminals 1A and 2A (wiring harness-side) and body ground.
•  Is there any continuity?
Yes
Go to the next step.
No
Repair or replace wiring harness and/or ground point for a possible open circuit, then go to Step 11.
6
INSPECT FAN CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN OR SHORT TO GROUND
•  Reconnect the battery negative terminal.
•  Fan control module connector is disconnected.
•  Switch the ignition to ON (engine off).
•  Measure the voltage at the fan control module terminal 1D (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Verify the FAN1 and FAN2 fuse condition.
•  If the FAN1 and/or FAN2 fuse is blown, repair or replace wiring harness for a possible short to ground circuit.
•  If the FAN1 and FAN2 fuse is normal, repair or replace wiring harness for a possible open circuit.
Then go to Step 11.
7
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
8
INSPECT COOLING FAN CONTROL SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Disconnect the battery negative terminal.
•  Fan control module and PCM connectors are disconnected.
•  Inspect for continuity between fan control module terminal 1C (wiring harness-side) and ground.
•  Is there any continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 11.
No
Go to the next step.
9
INSPECT COOLING FAN CONTROL SIGNAL CIRCUIT FOR OPEN
•  Battery negative terminal is disconnected.
•  Fan control module and PCM connectors are disconnected.
•  Inspect for continuity between fan control module terminal 1C (wiring harness-side) and PCM terminal 318 (wiring harness-side).
•  Is there any continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 11.
10
INSPECT THROTTLE VALVE CONTROL AND FEEDBACK SIGNAL CIRCUITS FOR SHORT TO POWER SUPPLY
•  Reconnect the battery negative terminal.
•  Fan control module and PCM connectors are disconnected.
•  Turn the ignition switch ON (engine off).
•  Measure the voltage at fan control module terminal 1C (wiring harness-side).
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
No
Replace the cooling fan component, then go to the next step.
(See COOLING FAN COMPONENT REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
11
VERIFY THAT DTC P0480 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?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
12
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
No
DTC troubleshooting completed.