1.CHECK DTC. Read the DTC of the meter using the Subaru Select Monitor. Read Diagnostic Trouble Code (DTC) | Is DTC B1507 a current malfunction- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION |
2.CHECK CURRENT DATA. Using the Subaru Select Monitor, display «Ambient air temperature» from «Data monitor». Read Current Data | | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION |
3.CHECK HARNESS (OPEN CIRCUIT). 1) Turn the ignition switch to OFF. 2) Disconnect the meter connector and ambient sensor connector. 3) Using the tester, measure the resistance between terminals. Connector & terminal (i10) No. 23 — (B480) No. 2: (i10) No. 24 — (B480) No. 1: | Is the resistance 10 - or less- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION | Repair the open circuit of harness or replace harness. |
4.CHECK HARNESS (GROUND SHORT CIRCUIT). Using the tester, measure the resistance between terminals. Connector & terminal (i10) No. 23 — Chassis ground: (i10) No. 24 — Chassis ground: | Is the resistance 10 - or less- | Repair the short circuit of harness or replace harness. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION |
5.CHECK AMBIENT SENSOR. Perform the inspection of ambient sensor unit. Ambient Sensor | | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION | Replace the sensor. Ambient Sensor |
6.CHECK CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect connectors. | Is there poor contact of connector- | Repair or replace the poor contact of connector. | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. |
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