Mazda 6 2002 - Page 238

ON-BOARD DIAGNOSTIC
F141
F
End Of Sie
3 INSPECT COOLING FAN RELAY NO.2 POWER
CIRCUIT FOR OPEN
• Turn ignition switch to ON (Engine OFF).
• Measure voltage between cooling fan relay
No.2 terminal E (harness side) and body
ground.
• Is voltage B+?
Yes Go to next step.
No Replace or replace harness for open, then go to Step 9.
4 INSPECT COOLING FAN RELAY NO.2
• Inspect cooling fan relay No.2.
(See T24 RELAY INSPECTION)
• Is cooling fan relay No.2 okay?
Yes Go to next step.
No Replace cooling fan relay No.2, then go to Step 9.
5 INSPECT COOLING FAN RELAY NO.2
CONTROL CIRCUIT FOR SHORT TO POWER
• Measure voltage between cooling fan relay
No.2 terminal A (harness side) and body
ground.
• Is voltage B+?
Yes Repair or replace harness for short to power, then go to
Step 9.
No Go to next step.
6 INSPECT COOLING FAN RELAY NO.2
CONTROL CIRCUIT FOR SHORT TO GROUND
• Inspect continuity between cooling fan relay
No.2 terminal A (harness side) and body
ground.
• Is there continuity?
Yes Repair or replace harness for open, then go to Step 9.
No Go to next step.
7 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect for poor connection (damaged/pulled-
out pins, corrosion, etc.).
• Is there malfunction?
Yes Repair or replace terminal and/or connector, then go to
Step 9.
No Go to next step.
8 INSPECT COOLING FAN RELAY NO.2
CONTROL CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between cooling fan relay
No.2 terminal A and PCM terminal 4L.
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open, then go to next step.
9 VERIFY TROUBLESHOOTING OF DTC P0480
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
(See F66 KOEO/KOER SELF-TEST.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See F43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
10 VERIFY AFTER REPAIR PROCEDURE
• Perform After Repair Procedure.
(See F66 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F67 DTC TABLE.)
No Troubleshooting completed.
STEP INSPECTION ACTION