Mazda CX-9 Grand Touring 2009 Manual page 1098

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-
6
3.7].)
Are any DTCs present?
DTC P0480 [MZI-3.7]
DTC P0480 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0480 Fan control circuit
DETECTION
CONDITION
POSSIBLE CAUSE
2008 Mazda CX-9 Grand Touring
No
This test inspect the fan control circuit. The DTC sets if the PCM detects the
voltage on the fan control variable circuit is not within the expected range.
Connector or terminal malfunction
Fan control module malfunction
Dual fan control module
Open circuit between fan control module No.1 terminal 1B and PCM
terminal 1AM
Short to power supply between fan control module No.1 terminal 1B and
PCM terminal 1AM
Short to ground circuit between fan control module No.1 terminal 1B and
PCM terminal 1AM
Open circuit between fan control module No.2 terminal B and PCM
terminal 1AM
Short to power supply between fan control module No.2 terminal B and
PCM terminal 1AM
Short to ground circuit between fan control module No.2 terminal B and
PCM terminal 1AM
Open circuit between fan control module No.1 terminal 1A and cooling fan
relay No.1 terminal E
Open circuit between fan control module No.1 terminal 1C and body ground
Open circuit between fan control module No.2 terminal A and cooling fan
relay No.2 terminal E
Open circuit between fan control module No.2 terminal C and body ground
Single fan control module
Open circuit between fan control module terminal 1B and PCM terminal 1
AM
Short to power supply between fan control module terminal 1B and PCM
terminal 1AM
Short to ground circuit between fan control module terminal 1B and PCM
Troubleshooting completed.