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P1488

Read the instructions below then start the fault diagnostic procedure.

Symptom: Incorrect radiator fan function.

P1488


Cooling Fan 2 Control Circuit, Open

Fault symptoms


• Incorrect radiator fan function.


On-Board Diagnostics

Type of diagnosis:


- Continuous.


Enable criteria:


- Engine running.

- Radiator fan circuit NOT activated.


Fault criteria:


- No voltage on the control module output for more than 0.6 s.


System reaction to a fault:


- Radiator fan speed set to LOW.


OK report:


- Fault criteria NOT fulfilled for 0.6 s.


Check the wiring

A fault in the control module's female connector can generate a DTC. Check the contact for oxidation, dislodge pins and pin clamping force.

Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this. Check switches, connectors and crimp connections for oxidation, dislodged pins and pin clamping force.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Diagnostic tool functions related to this fault are:


• Read value:

• Fan control, output 2

• Activate:

• Fan control, output 2


For more information, see also:

- "Read Values" menu for a description of read values.

- "Activate" menu for a description of applications.