F2–210
TROUBLESHOOTING
End Of Si e
NO.17 COOLING SYSTEM CONCERNS-OVERHEATING
A6E408018881219
Diagnostic Procedure
17
COOLING SYSTEM CONCERNS-OVERHEATING
DESCRIPTION • Engine runs at higher than normal temperature/overheats.
POSSIBLE
CAUSE
• Cooling fan No.2 malfunction
• Cooling fan No.1 malfunction
• Low drive belt tension
• Drive belt damage
• Improper coolant level
• Thermostat malfunction
• Radiator clogging
• Improper water/anti-freeze mixture
• Improper or damaged radiator cap
• Radiator hose damage
• Coolant leakage (engine internal, turbocharger, external)
• A/C system malfunction
• EGR system malfunction
• Coolant heater system malfunction
STEP INSPECTION RESULTS ACTION
1 Inspect following:
• Engine coolant level
• Coolant leakage (around heater unit in
passenger compartment, coolant hoses and/
or radiator, and around coolant heater unit.)
• Water and anti-freeze mixture
• Radiator condition
• Collapsed or restricted radiator hoses
• Radiator pressure cap
• Drive belt tension
• Drive belt
• Fan rotational direction
Are all items okay?
Yes Go to next step.
No Service as necessary.
Repeat Step 1.
2 Perform self-test function using WDS or
equivalent.
Turn engine switch to ON.
Retrieve any DTC.
Is DTC displayed?
Yes DTC is displayed:
Go to appropriate DTC test.
Communication error message is displayed:
Inspect for following:
• Open circuit between PCM control relay and PCM
terminal 53 or 79
• Open circuit PCM control relay and PCM terminal
69
• PCM control relay stuck open
• Open or poor GND circuit (PCM terminal 65, 85,
103 or 104)
• Poor connection vehicle body GND
No No DTC is displayed:
Go to next step.
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