E.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) - Diagnostic Procedure 17 (Cont'd)
EF & EC-127flowchartE.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) [GA13DS, GA14DS & GA16DS]
Diagnostic Procedure 17 (Cont'd)
Diagnostic Procedure 17 (Cont'd) - Mixture Heater Control
1
INSPECTION START
2
A. CHECK CONTROL FUNCTION. 1) Make sure that engine is cold. [Engine temperature is below 75°C (167°F).] 2) Disconnect mixture heater harness connector. 3) Start engine. 4) Check voltage between terminal 5 and ground. Voltage: Battery voltage. 5) After engine is warmed up sufficiently, recheck voltage between terminal 5 and ground. Voltage: Approximately 0V.
N.G.
C. CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect mixture heater relay. 3) Check voltage between terminals 2, 3 and ground. Voltage: Battery voltage.
O.K.
3
B. CHECK GROUND CIRCUIT. 1) Stop engine. 2) Check harness continuity between terminal 4 and engine ground. Continuity should exist. If N.G., repair harness or connectors.
O.K.
4
CHECK COMPONENT (Mixture heater). Refer to "Electrical Components Inspection". (See page EF & EC-146.) If N.G., replace mixture heater.
O.K.
INSPECTION END