Mazda RX-8 Workshop Manual page 321

< Previous Next >
2011 - RX-8 - Engine
DTC P0482 [13B-MSP]
DTC P0482 Cooling fan relay No.4 and No.5 control circuit problem
DETECTION
CONDITION
POSSIBLE
CAUSE
The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the
cooling fan relay No.4/No.5 off. If the control voltage is low, the PCM determines that the
cooling fan No.4/No.5 control circuit voltage is low.
The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the
cooling fan relay No.4/No.5 on. If the control voltage is high, the PCM determines that the
cooling fan No.4/No.5 control circuit voltage is high.
Diagnostic support note
This is a continuous monitor (other).
The MIL does not illuminate.
PENDING CODE is available if the PCM detects the above malfunction condition during the
first drive cycle.
FREEZE FRAME DATA (Mode 2/Mode 12) is not available.
The DTC is stored in the PCM memory.
Cooling fan relay No.4/No.5 terminal malfunction
Short to ground or open circuit in cooling fan relay No.4/No.5 power supply circuit
Short to ground in wiring harness between main relay terminal C and
cooling fan relay No.4 terminal A
Short to ground in wiring harness between main relay terminal C and
cooling fan relay No.5 terminal A
Cooling fan relay No.4/No.5 related fuse malfunction
Open circuit in wiring harness between main relay terminal C and cooling
fan relay No.4 terminal A
Open circuit in wiring harness between main relay terminal C and cooling
fan relay No.5 terminal A
Short to ground in wiring harness between cooling fan relay No.4 terminal E and PCM
terminal 1R
Short to ground in wiring harness between cooling fan relay No.5 terminal E and PCM
terminal 1R
Cooling fan relay No.4/No.5 malfunction