Diagnostic Procedure 25 (Cont'd) - ENGINE TEMPERATURE SENSOR (Code No. 13)
EF & EC-299flowchartEngine Temperature Sensor (Code No. 13) diagnostic flow
1
INSPECTION START
2
CHECK POWER SUPPLY. 1) Start engine. 2) Read engine temperature sensor signal in "DATA MONITOR" mode with CONSULT. Engine temperature should gradually rise and reach more than 70degC (158degF) after engine warm-up. -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.
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-348.)
N.G.
Replace engine temperature sensor.
O.K.
5
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.