TROUBLE DIAGNOSES - Diagnostic Procedure 2 (Cont'd)
EF & EC-83flowchartDiagnostic Procedure 2 (Cont'd)
1
INSPECTION START
2
Perform self-diagnosis (Mode III). Is Code No. 11 indicated?
No
INSPECTION END
Yes
3
A - CHECK POWER SOURCE.
1) Disconnect crank angle sensor harness connector.
2) Turn ignition switch "ON".
3) Check voltage between terminal b and ground.
Voltage: Battery voltage
N.G.
Repair harness or connectors.
O.K.
4
B - CHECK INPUT SIGNAL.
1) Reconnect crank angle sensor harness connector.
2) Start engine.
3) Check that pulse signals exist in E.C.U. terminals 42, 52 and 41, 51 with logic probe.
Pulse signals should exist.
42, 52: 1° signal
41, 51: 180° signal
O.K.
same as step 2
N.G.
5
C - CHECK CONTINUITY BETWEEN E.C.U. AND CRANK ANGLE SENSOR.
1) Turn ignition switch "OFF".
2) Disconnect E.C.U. harness connector.
3) Disconnect crank angle sensor harness connector.
4) Check continuity between terminal a and ground, terminals c and 42, 52 and terminals d and 41, 51.
Resistance: Approximately 0Ω
O.K.
6
CHECK COMPONENT (Crank angle sensor). Refer to "Electrical Components Inspection". (See page EF & EC-124.)
| Specification | Value |
|---|---|
| Voltage at terminal b (crank angle sensor disconnected, ignition ON)Ignition switch ON, crank angle sensor harness connector disconnected | Battery voltageV |
| Pulse signal at ECU terminals 42, 521° signal, engine running | Should exist |
| Pulse signal at ECU terminals 41, 51180° signal, engine running | Should exist |
| Continuity resistance between terminal a and ground, terminals c and 42/52, terminals d and 41/51Ignition OFF, ECU harness connector and crank angle sensor harness connector disconnected | Approximately 0Ω |
Voltage at terminal b (crank angle sensor disconnected, ignition ON)Ignition switch ON, crank angle sensor harness connector disconnected
Battery voltageV
Pulse signal at ECU terminals 42, 521° signal, engine running
Should exist
Pulse signal at ECU terminals 41, 51180° signal, engine running
Should exist
Continuity resistance between terminal a and ground, terminals c and 42/52, terminals d and 41/51Ignition OFF, ECU harness connector and crank angle sensor harness connector disconnected
Approximately 0Ω