DTC P0480 [MZI-3.7 (PCM CONNECTOR (2 TYPES))]

id0102e3807400

DTC P0480

Fan control circuit
DETECTION CONDITION
•  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.
POSSIBLE CAUSE
•  Fan control module connector or terminal malfunction
•  PCM connector or terminal malfunction
•  Fan control module malfunction
•  PCM malfunction
―  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.2 terminal A and cooling fan relay No.2 terminal E
―  Open circuit between fan control module No.1 terminal 1C and body ground
―  Open circuit between fan control module No.2 terminal C and body ground
―  Short to power supply between fan control module No.1 terminal 1B 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.1 terminal 1B 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 1B and PCM terminal 1AM
―  Open circuit between fan control module No.2 terminal B and PCM terminal 1AM

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT FAN CONTROL MODULE CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect fan control module connector.
•  Inspect for poor connection (such as damaged, pulled-out pins, corrosion, etc.).
•  Are there any malfunction?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
4
INSPECT FAN CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to the ON position (Engine off).
•  Measure voltage between the following circuits:
―  Fan control module No.1 terminal 1A (wiring harness-side) and body ground.
―  Fan control module No.2 terminal A (wiring harness-side) and body ground.
•  Are there voltage B+?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to Step 10.
5
INSPECT FAN CONTROL MODULE GROUND CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch off.
•  inspect for continuity between the following circuits:
―  Fan control module No.1 terminal 1C (wiring harness-side) and body ground.
―  Fan control module No.2 terminal C (wiring harness-side) and body ground.
•  Are there continuity?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to Step 10.
6
INSPECT FAN CONTROL CIRCUIT FOR SHORT TO POWER
•  Turn the ignition switch to the ON position (Engine off).
•  Measure the voltage between the following circuits:
―  Fan control module No.1 terminal 1B (wiring harness-side) and body ground.
―  Fan control module No.2 terminal B (wiring harness-side) and body ground.
•  Are there voltage B+?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
7
INSPECT FAN CONTROL CIRCUIT FOR SHORT TO GROUND
•  Turn the ignition switch off.
•  Inspect continuity between the following circuits:
―  Fan control module No.1 terminal 1B (wiring harness-side) and body ground.
―  Fan control module No.2 terminal B (wiring harness-side) and body ground.
•  Are there continuity?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
9
INSPECT FAN CONTROL CIRCUIT FOR OPEN CIRCUIT
•  Inspect continuity between the following circuits:
―  Fan control module No.1 terminal 1B (wiring harness-side) and PCM terminal 1AM (wiring harness-side).
―  Fan control module No.2 terminal B (wiring harness-side) and PCM terminal 1AM (wiring harness-side).
•  Are there continuity?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0480 HAS BEEN COMPLETED
•  Verify that all disconnected connectors reconnected.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the “KOEO or KOER self-test”.
•  Are any DTCs present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7 (PCM CONNECTOR (2 TYPES))].)
No
Troubleshooting completed.