Subaru IMPREZA 2004 Service Manual page 494

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
AU:DTC P0502 VEHICLE SPEED SENSOR CIRCUIT LOW INPUT
NOTE:
For the diagnostic procedure, refer to DTC P0503. <Ref. to EN(H4SO)(diag)-186, DTC P0503 VEHICLE
SPEED SENSOR INTERMITTENT/ERRATIC/HIGH, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
Check
Is any other DTC displayed?
EN(H4SO)(diag)-185
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Check the radiator
vant DTC using fan motor connec-
"List of Diagnostic tor for connecting
Trouble Code condition.
(DTC)". <Ref. to If connected
EN(H4SO)(diag)- securely, check
74, List of Diag- radiator fan and
nostic Trouble fan motor. <Ref. to
Code (DTC).> CO(H4SO)-23,
Radiator Main Fan
and Fan Motor.>
and <Ref. to
CO(H4SO)-24,
Radiator Sub Fan
and Fan Motor.>
No