Diagnostic Procedure 25 (Cont'd) - Engine Temperature Sensor
EF & EC-477flowchartApplies to SR20DE. Harness connector callouts differ for L.H.D. vs R.H.D. models. CONSULT DATA MONITOR or manual voltage check are alternatives for power supply check.
Engine Temperature Sensor (Code No. 13) Inspection
1
INSPECTION START
2
CHECK POWER SUPPLY. 1) Start engine and warm it up sufficiently. 2) Select engine temperature sensor signal in "DATA MONITOR" mode with CONSULT. 3) Stop engine. 4) When restarting engine make sure that CONSULT indicates "ENG.TEMP SEN" is 50C (122F) or more. OR 1) Disconnect engine temperature sensor harness connector. 2) Turn ignition switch "ON". 3) Check voltage between terminal (b) and ground. Voltage: Approximately 5V
N.G.
Check the following. - Harness connectors 7, 222 (L.H.D. models) - Harness connectors 11, 215 (R.H.D. models) - Harness continuity between E.C.U. and engine temperature sensor. If N.G., repair harness or connectors.
Check the following. - Harness connectors 7, 222 (L.H.D. models) - Harness connectors 11, 215 (R.H.D. models) - Harness continuity between E.C.U. and engine temperature sensor. If N.G., repair harness or connectors.
O.K.
3
CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Check harness continuity between terminal (a) and engine ground. Continuity should exist.
N.G.
same as step 2
O.K.
4
CHECK COMPONENT (Engine temperature sensor). Refer to "Electrical Components Inspection". (See page EF & EC-630.)
N.G.
Replace engine temperature sensor.
O.K.
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.