DTC P058C: Battery Monitor Module Temperature Monitoring Performance: Notes

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is any of DTC P0116, P0117, P0118, P0125, P058A or P058E displayed? (Current code or history code)

Yes: Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

No: Go to 2.
CHECK FREEZE FRAME DATA .
Using the Subaru Select Monitor, read the values in [Battery Terminal Voltage], [Battery Charge/Discharge Current] and [Estimated Battery Temperature].

NOTE: For detailed operation procedures, refer to "COMMON (DIAGNOSTICS)". Ref. to COMMON (DIAGNOSTICS)>FREEZE FRAME DATA .

Is [Battery Terminal Voltage] 14.3 V, is [Battery Charge/Discharge Current] 0 A, and is [Estimated Battery Temperature] 20°C (68°F)? (Check the value that is before confirming malfunction)

NOTE: If it is fixed to the failsafe value ([Battery Terminal Voltage]: 14.3 V, [Battery Charge/Discharge Current]: 0 A, [Estimated Battery Temperature]: 20°C (68°F)) before confirming malfunction, it can be judged that DTC was detected due to malfunction occurrence during self-diagnosis of the battery sensor. Therefore, check P058A.

Yes: Check for DTC P058A. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P058A BATTERY MONITOR MODULE PERFORMANCE .

No: Go to 3.
CHECK FOR REPRODUCTION OF FAILURE .
1. Using the Subaru Select Monitor, read the values in [Engine Coolant Temperature 1] and [Ambient Temperature].
  NOTE: For detailed operation procedures, refer to "COMMON (DIAGNOSTICS)". Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR .
2. Leave the ignition switch in OFF position until the difference between [Engine Coolant Temperature 1] and [Ambient Temperature] is reduced to 10 [°C] (18°F) or less.
3. Leave the battery for 5 seconds or more with the battery sensor connector disconnected, and then reconnect the connector.
4. Turn the ignition switch to ON.
5. Using the Subaru Select Monitor, read the values of [Estimated Battery Temperature] and [Engine Coolant Temperature 1].
NOTE: For detailed operation procedures, refer to "COMMON (DIAGNOSTICS)". Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR .

Is the difference between [Estimated Battery Temperature] and [Engine Coolant Temperature 1] 36 [°C] (65°F) or more?

Yes: Replace the battery sensor. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY SENSOR .

No: Even if DTC is detected, it has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.