DTC P072A / P073E / P073F
Precautions: Precautions for Diagnosing Trouble · Precautions for Disassembly and Reassembly · Precautions for Transmission / Transaxle · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P072A: Stuck in Neutral TCM detects neutral position even if transmission range sensor signal is D range. (1 D/C detection logic) |
•Pressure control solenoid valve “A”, “B” and “D”
•Shift solenoid valve “A” and “B” •Valve body assembly •A/T (forward clutch, reverse clutch and/or 1st and reverse brake) •TCM |
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P073E: Unable to Engage Reverse TCM detects neutral position even if transmission range sensor signal is R range. (2 D/C detection logic) |
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P073F: Unable to Engage Gear 1 TCM detects neutral position even if transmission range sensor signal is D range. (2 D/C detection logic) |
DTC Confirmation Procedure
WARNING:
If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.
•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test using 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test using 2 persons, a driver and a tester.
NOTE:
Troubleshoot first unexpected DTCs previously detected in “DTC Confirmation Procedure”.
P072A / P073F
1)Warm up engine to normal operating temperature.
2)Drive vehicle in D range for 10 sec.
P073E
1)Warm up engine to normal operating temperature.
2)Drive vehicle in R range for 10 sec.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “A/T Control System Check” performed?
|
Go to Step 2.
|
Go to A/T Control System Check.
|
| 2 |
ATF check
1)Check ATF for level and deterioration.
Is check result OK?
|
Go to Step 3.
|
Refill or change ATF.
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| 3 |
Line pressure check
1)Check applicable line pressure as shown in the following table.
Is check result OK?
|
Go to Step 4.
|
Repair or replace defective parts.
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| 4 |
Solenoid valve check
1)Remove valve body assembly.
2)Check applicable solenoid valve for proper operation as shown in the following table.
Is check result OK?
|
Go to Step 5.
|
Replace valve body assembly.
|
| 5 |
Valve body check
1)Check that each fluid passage is not clogged in valve body assembly.
Is check result OK?
|
Check A/T mechanical systems (clutch, brake or gear etc.)
If OK, substitute a known-good TCM and recheck DTC.
|
Clean or replace valve body assembly.
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Table for Step 3 (Line pressure check)
| DTC | Line pressure | ||
|---|---|---|---|
| C1 | C3 | B2 | |
| P072A |  |
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| P073E | |
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| P073F | |
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Table for Step 4 (Solenoid valve check)
| DTC | Shift solenoid valve | Pressure control solenoid valve | |||
|---|---|---|---|---|---|
| A | B | A | B | D | |
| P072A | |
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| P073E | |
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| P073F | |
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