AUTOMATIC TRANSMISSION ± Troubleshooting <A/T>
23-10
INSPECTION PROCEDURES FOR DIAGNOSIS CODES
Code No. 13, 14 Accelerator pedal position sensor (APS) Probable cause
If the APS output voltage (APS opening voltage) is 4.8 V or higher when the engine
is idling, the output voltage is judged to be too high and diagnosis code No. 13
is output. If the APS output voltage (APS opening voltage) is 0.335 V or lower
when the engine is idling, the output voltage is judged to be too low and diagnosis
code No. 13 is output.
If the APS output voltage (APS power supply voltage) is 3.0 V or lower or if it
is 5.7 V or higher when the engine is idling, the APS is judged to be faulty and
diagnosis code No. 14 is output.
Malfunction of the accelerator pedal position sensor
Malfunction of harness or connector
Malfunction of the A/T-ECU
OK
Replace the A/T-ECU.
OK
Check the trouble symptoms.
NG
Check the harness wire between accel-
erator pedal position sensor and
A/T-ECU.
Accelerator pedal position sensor
check (Refer to GROUP 13A ± On-ve-
hicle Service.)
NG
Check the following connectors:
<L.H. drive vehicles> C-46, C-25, D-34,
D-04
<R.H. drive vehicles> C-46, C-26, D-34,
D-04
NG
Replace
Repair
Repair
OK
NG
Code No. 15, 16 A/T fluid temperature sensor system Probable cause
If the A/T fluid temperature sensor output is 10°C or less (5.6 kΩ or more) even
after running the engine for 15 minutes or more, it is judged that there is an open
circuit in the A/T fluid temperature sensor and diagnosis code No. 15 is output.
If the A/T fluid temperature sensor output is 240°C or more (10 Ω or less), it is
judged that there is a short circuit in the A/T fluid temperature sensor and diagnosis
code No. 16 is output.
Malfunction of the A/T fluid temperature sensor
Malfunction of harness or connector
Malfunction of the A/T-ECU
OK
Replace the A/T-ECU.
OK
Check the trouble symptoms.
Check the harness wire between A/T
fluid temperature sensor and A/T-ECU.
A/T fluid temperature sensor check
(Refer to P.23-43.)
NG
Check the following connectors:
B-03, D-04
NG
Replace
Repair
Repair
OK
NG
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