Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection — Idle check and procedure (Cont'd)
EF & EC-394flowchartEngine temperature substitution uses 2.5 kΩ resistor (manual path) or CONSULT ACTIVE TEST ENG TEMPERATURE set to 20°C. Page is in the SR tab of the EF & EC section.
Exhaust gas sensor harness / engine temperature substitution (Cont'd)
1
C
2
Check exhaust gas sensor harness:
1) Turn off engine and disconnect battery ground cable.
2) Disconnect E.C.U. S.M.J. harness connector from E.C.U.
3) Disconnect exhaust gas sensor harness connector and connect main harness side terminal for exhaust gas sensor to ground with a jumper wire.
4) Check for continuity between terminal No. 19 of E.C.U. S.M.J. harness connector and body ground.
Continuity exists ........... O.K.
Continuity does not exist ... N.G.
N.G.
Repair or replace harness.
Repair or replace harness.
E
O.K.
3
Connect E.C.U. S.M.J. harness connector to control unit.
4
Connect battery ground cable.
5
1) Select "ENG TEMPERATURE" in "ACTIVE TEST" mode.
2) Set "ENGINE TEMP" to 20°C (68°F) by touching "Qu" and "Qd" and "UP", "DOWN".
OR
6
Start engine and warm it up until water temperature indicator points to middle of gauge.
7
D