TROUBLE DIAGNOSES — Diagnostic Procedure 1
AT-47flowchartApplicable to A/T (Automatic Transmission) equipped vehicles. Diagnostic procedure concerns O.D. OFF indicator lamp circuit and A/T control unit (E117 connector, 16-pin connector). Terminals referenced: 29, 30 (power), 31, 32 (ground), 23 and 29 (lamp circuit). Wire colors: G/L (Green/Blue), G/R (Green/Red).
Diagnostic Procedure 1
SYMPTOM: O.D. OFF indicator lamp does not come on for about 2 seconds when turning ignition switch to "ON".
Diagnostic Procedure 1 — O.D. OFF indicator lamp does not come on for about 2 seconds when turning ignition switch to ON
1
CHECK A/T CONTROL UNIT POWER SOURCE.
1. [Ignition switch ON icon]
2. Check voltage between A/T control unit terminals (29), (30) and ground.
Battery voltage should exist.
N.G.
Check the following items.
Check the following items.
• Harness continuity between ignition switch and A/T control unit (Main harness)
• Ignition switch and fuse — Refer to section EL.
O.K.
2
CHECK A/T CONTROL UNIT GROUND CIRCUIT.
1. [Ignition switch OFF icon]
2. Disconnect A/T control unit 16-pin connector.
3. Check resistance between A/T control unit terminals (31), (32) and ground.
Resistance: Approximately 0Ω
N.G.
Check harness continuity between A/T control unit and ground.
O.K.
3
CHECK LAMP CIRCUIT.
1. [Ignition switch OFF icon]
2. Disconnect A/T control unit 16-pin connector.
3. Check resistance between A/T control unit terminals (23) and (29).
Resistance: 50 - 100Ω
4. Reinstall any part removed.
N.G.
Check the following items.
Check the following items.
• O.D. OFF indicator lamp — Refer to section EL.
• Harness continuity between ignition switch and O.D. OFF indicator lamp (Main harness)
• Harness continuity between power shift indicator lamp and A/T control unit
O.K.
4
Check again.
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