TROUBLE DIAGNOSES — Self-diagnosis (Cont'd) — REVOLUTION SENSOR CIRCUIT CHECK / SPEED SENSOR CIRCUIT CHECK
AT-36flowchartA/T (Automatic Transmission) only. Connector E117 used for A/T control unit harness connection. Terminal 16 for revolution sensor (W wire), terminal 24 for speed sensor (Y/G wire).
Self-diagnosis (Cont'd)
REVOLUTION SENSOR CIRCUIT CHECK
1
CHECK REVOLUTION SENSOR. — Refer to "Electrical Components Inspection".
N.G.
Repair or replace revolution sensor.
O.K.
2
CHECK INPUT SIGNAL. [A]
1. [Connector illustration]
2. Check voltage between A/T control unit terminal (16) and ground while driving. (Measure with A.C. range.)
Voltage:
At 0 km/h (0 MPH): 0V
At 30 km/h (19 MPH): 1V or more
(Voltage rises gradually in response to vehicle speed)
N.G.
Check the following items.
Check the following items.
• Harness continuity between A/T control unit and revolution sensor (Main harness)
• Harness continuity between revolution sensor and E.C.U. (Main harness)
• Ground circuit for E.C.U. — Refer to section EF & EC.
O.K.
3
Perform self-diagnosis again after driving for a while.
N.G.
1. Perform A/T control unit input/output signal inspection.
1. Perform A/T control unit input/output signal inspection.
2. If N.G., recheck A/T control unit pin terminals for damage or connection of A/T control unit harness connector.
O.K.
INSPECTION END
SPEED SENSOR CIRCUIT CHECK
1
CHECK INPUT SIGNAL. [A]
1. [Connector illustration]
2. Check voltage between A/T control unit terminal (24) and ground while driving at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or more.
Voltage: Varies from 0V to 5V
N.G.
Check the following items.
Check the following items.
• Speed sensor and ground circuit for speed sensor — Refer to section EL.
• Harness continuity between A/T control unit and speed sensor (Main harness)
O.K.
2
Perform self-diagnosis again after driving for a while.
N.G.
1. Perform A/T control unit input/output signal inspection.
1. Perform A/T control unit input/output signal inspection.
2. If N.G., recheck A/T control unit pin terminals for damage or connection of A/T control unit harness connector.
O.K.
INSPECTION END
| Specification | Value |
|---|---|
| Revolution sensor output voltage at A/T control unit terminal 16 — at 0 km/h (0 MPH)A.C. range, vehicle stopped | 0V |
| Revolution sensor output voltage at A/T control unit terminal 16 — at 30 km/h (19 MPH)A.C. range, vehicle driving at 30 km/h (19 MPH); voltage rises gradually in response to vehicle speed | 1 or moreV |
| Speed sensor output voltage at A/T control unit terminal 24 — at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or moreVehicle driving at 2-3 km/h (1-2 MPH) | Varies from 0 to 5V |
Revolution sensor output voltage at A/T control unit terminal 16 — at 0 km/h (0 MPH)A.C. range, vehicle stopped
0V
Revolution sensor output voltage at A/T control unit terminal 16 — at 30 km/h (19 MPH)A.C. range, vehicle driving at 30 km/h (19 MPH); voltage rises gradually in response to vehicle speed
1 or moreV
Speed sensor output voltage at A/T control unit terminal 24 — at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or moreVehicle driving at 2-3 km/h (1-2 MPH)
Varies from 0 to 5V
Revolution Sensor — A/T Control Unit Connection
Revolution sensorA/T control unitW
Revolution sensorA/T control unit
Speed Sensor — A/T Control Unit Connection
Speed sensorA/T control unitY/G