Inspection steps

CAUTION: Before performing inspections according to this flow chart, check that no abnormal condition is present in the engine. (Refer to HOW TO TROUBLESHOOT )

Reading diagnostic codes

Using SSM4, check if any diagnostic code related to CAN communication system is output. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )

RESULT DESCRIPTION

Result	Go to
Diagnostic code is not output	A
Diagnostic code is output	B

A: Go to next step

B: To CAN communication system (Refer to HOW TO TROUBLESHOOT )

Implementation of SSM4 active test

Courtesy of SUBARU OF AMERICA, INC.

Using SSM4, display the [Active Test] screen according to the screen and perform check. (Refer to DATA MONITOR/ACTIVE TEST )

NOTE: For TFT meter, go to STEP3.

SSM4 screen: [Each System] →[Combination Meter] →[Active Test]

Item name	Contents of testing	Check item
[Water thermometer]	Coolant temperature indication changeover	127°C {261°F} [Display H] 120°C {248°F} [Display G] 110°C {230°F} [Display F] Intermediate stable range [Display E] 80°C {176°F} [Display D] 70°C {158°F} [Display C] 60°C {140°F} [Display B] 50°C {122°F} [Display A]

Criteria: Each value specified by [Active Test] can be displayed smoothly

NOTE: For TFT meter, go to STEP3.

NG: Replacement of the combination meter ASSY (Refer to REMOVAL )

OK: Go to next step

Reading of SSM4 data (engine coolant temperature)

On the SSM4, navigate to the [Data monitor] display, and check the computer data. (Refer to DATA MONITOR/ACTIVE TEST )

SSM4 screen: [Each System] →[Combination Meter] →[Data monitor]

Item name [Symbol]	Description/display range	Normal value	Remarks
[Coolant Temp.] [Coolant Temp]	Engine coolant temperature input Display range: 0 to 127.5°C {0 to 261.5°F}	Equivalent to ambient temperature: When engine is cold When fully warmed up: 80 to 100°C {176 to 212°F}	If it is abnormal, the coolant temperature signal system may be faulty

Criteria: The normal value of [Data monitor] is almost equal to the value of the water temperature receiver gauge.

NG: Replacement of the combination meter ASSY (Refer to REMOVAL )

OK: Go to next step

Reading the diagnostic code (EFI system)

Using SSM4, check if any diagnostic code related to the EFI system is output. (Refer to CHECKING/CLEARING DTC )

RESULT DESCRIPTION

Result	Go to
Diagnostic code is not output	A
Diagnostic code is output	B

A: Go to next step

B: To EFI system (Refer to HOW TO TROUBLESHOOT )

Reading of SSM4 data (engine coolant temperature)

On the SSM4, navigate to the [Data monitor] display, and check the computer data. (Refer to DATA MONITOR/ACTIVE TEST )

SSM4 screen: [Each System] →[Engine Control System] →[Data monitor]

Item name [Symbol]	Description/display range	Normal value	Remarks
[Coolant Temp] [Coolant Temp]	Indicates the engine coolant temperature Display range: -40 to 215°C {-40 to 419°F}	75 to 100°C {167 to 212°F} After warming-up	Engine coolant temperature after warm-up is 75 to 100°C After the engine is stopped and left unattended for a long time, the engine coolant temperature, intake air temperature and ambient temperature will be almost the same If the engine coolant temperature reads -40°C or 215°C, an open or short circuit may be present in the sensor system

Criteria: The normal value of [Data monitor] is almost equal to the value of the water temperature receiver gauge.

NG: To EFI system (Refer to HOW TO TROUBLESHOOT )

OK: Go to next step

Replacement of combination meter ASSY

Replace with a new or normally functioning combination meter ASSY (Refer to REMOVAL ) and check the operation of the water temperature receiver gauge.

RESULT DESCRIPTION

Result	Go to
Operates normally	A
Operates abnormally	B

A: Go to next step

B: Replacement of the engine control computer (Refer to REMOVAL )

Complete (Internal fault of the combination meter ASSY)