Engine Fails To Reach Normal Operating Temperature; Pressure Cap Testing - Suzuki XL7 2007 Service Manual

1F-19 Engine Cooling System:

Engine Fails To Reach Normal Operating Temperature

Step
1. Ensure that the cooling system is full.
2. Allow the engine to cool.
3. Start the engine.
1
4. Turn the air conditioning system off.
5. Inspect the engine cooling fan(s).
Is the electric cooling fan on?
1. Diagnose and repair the cooling fan system. Refer to
"Cooling Fan Always On".
2
2. Verify the customer complaint.
Does the engine still fail to reach normal operating
temperature?
Install the Scan Tool to the DLC. Compare the Scan Tool
coolant temperature reading to the I/P cluster coolant
3 temperature.
Is the I/P cluster coolant temperature close to the reading on
the Scan Tool?
1. Diagnose and repair the coolant temperature gage
system.
4
2. Verify the customer complaint.
Does the engine still fail to reach normal operating
temperature?
Inspect the thermostat for proper operation. Refer to
5 "Thermostat Diagnosis".
Is the thermostat operating properly?
1. Replace the thermostat. Refer to "Thermostat
Replacement".
6
2. Verify the customer complaint.
Does the engine still fail to reach normal operating
temperature?

Pressure Cap Testing

Special tool
• J 24460-01 Cooling System Pressure Tester
• J 42401 Radiator Cap/Surge Tank Test Adapter
WARNING
!
To avoid being burned, do not remove the
radiator cap or surge tank cap while the
engine is hot. The cooling system will release
scalding fluid and steam under pressure if
radiator cap or surge tank cap is removed
while the engine and radiator are still hot.
1. Remove the pressure cap.
2. Wash the pressure cap sealing surface with water.
Action
3. Use the J 24460-01 (1) with J 42401 (2) in order to
Yes
Go to Step 2
Go to Step 3
Go to Step 5
Go to Step 5
Go to Step 1
Go to Step 1
test the pressure cap.
No
Go to Step 3
System OK
Go to Step 4
System OK
Go to Step 6
System OK