TROUBLE DIAGNOSES — Diagnostic Procedure 25 (Cont'd)
EF & EC-138flowchartDiagnostic Procedure 25 (Cont'd)
Diagnostic Procedure 25 (engine temperature sensor)
1
INSPECTION START
2
A — 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 50°C (122°F) or more. — OR — 1) Disconnect engine temperature sensor harness connector. 2) Turn ignition switch "ON". 3) Check voltage between temperature sensor terminal (b) and ground. Voltage: Approximately 5V
N.G.
Repair harness or connectors.
O.K.
3
B — 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-171 - 180)
N.G.
Replace engine temperature sensor.
O.K.
Check E.C.U. pin terminals for damage or poor connection of E.C.U. harness connector.
See also
EF & EC-171 - 180