Trouble Diagnoses — Self-diagnosis (Cont'd)
AT-46flowchartA/T (Automatic Transmission) specific diagnostic procedure. Connector E117 referenced with terminal 7 (kickdown switch) and terminal 4 (idle switch). Diagram reference SAT754B. Wire color Y/W (Yellow with White stripe) noted at A/T control unit terminal.
Self-diagnosis (Cont'd)
Self-diagnosis Cont'd — Kickdown Switch and Idle Switch Circuit Check
1
A (continued from previous page)
2
C — CHECK KICKDOWN SWITCH CIRCUIT.
1. [See figure — kickdown switch illustration]
2. Check voltage between A/T control unit terminal 7 and ground while depressing accelerator pedal slowly. (after warming up engine)
Voltage:
When releasing accelerator pedal: 3 - 8V
When depressing accelerator pedal fully: 1V or less
N.G.
Check the following items.
Check the following items.
• Kickdown switch
• Harness continuity between A/T control unit and kickdown switch (Main harness)
• Harness continuity of ground circuit for kickdown switch
O.K.
3
D — CHECK IDLE SWITCH CIRCUIT.
• Check voltage between A/T control unit terminal 4 and ground in the same way as kickdown switch circuit.
Voltage:
When releasing accelerator pedal: 8 - 15V
When depressing accelerator pedal fully: 1V or less
N.G.
Perform self-diagnosis (Mode IV) for engine control. Check idle switch circuit.
O.K.
4
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 |
|---|---|
| A/T control unit terminal 7 voltage — releasing accelerator pedalAfter warming up engine, kickdown switch circuit check | 3 - 8V |
| A/T control unit terminal 7 voltage — depressing accelerator pedal fullyAfter warming up engine, kickdown switch circuit check | 1 or lessV |
| A/T control unit terminal 4 voltage — releasing accelerator pedalIdle switch circuit check | 8 - 15V |
| A/T control unit terminal 4 voltage — depressing accelerator pedal fullyIdle switch circuit check | 1 or lessV |
A/T control unit terminal 7 voltage — releasing accelerator pedalAfter warming up engine, kickdown switch circuit check
3 - 8V
A/T control unit terminal 7 voltage — depressing accelerator pedal fullyAfter warming up engine, kickdown switch circuit check
1 or lessV
A/T control unit terminal 4 voltage — releasing accelerator pedalIdle switch circuit check
8 - 15V
A/T control unit terminal 4 voltage — depressing accelerator pedal fullyIdle switch circuit check
1 or lessV