DTC P1718 / P1719
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 |
|---|---|
|
P1718: Unable To Engage Gear 1 With Engine Brake Engine brake does not work at 1st gear when driving in M range. (2 D/C detection logic) |
•Line pressure control solenoid valve
•Pressure control solenoid valve “A”, “C” and “D” •Shift solenoid valve “A” and “B” •Valve body assembly •A/T (forward clutch, direct clutch, reverse clutch, B1 brake and/or 1st and reverse brake) •TCM |
|
P1719: Gear 1 With Engine Brake Incorrect Ratio Engine brake does not work at 1st gear when driving in M 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:
•Check that the following conditions are met in this “DTC Confirmation Procedure”.
—DTC P0717, P0722, P1736, P1737, P1738, P1739, U0073 or U0100 is not detected.
—ECM: DTC P0335 is not detected.
•Troubleshoot first unexpected DTCs previously detected in “DTC Confirmation Procedure”.—ECM: DTC P0335 is not detected.
1)Warm up engine to normal operating temperature.
2)Drive vehicle in 1st gear of M range.
3)Release accelerator pedal, and keep vehicle coasting in engine braking condition. (Fuel cut)
4)Repeat Steps 2) – 3) 5 times or more.
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.
|
| 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.
|
| 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.
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Replace valve body assembly.
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| 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 | C2 | C3 | B1 | B2 | |
| P1718 |  |
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| P1719 | |
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Table for Step 4 (Solenoid valve check)
| DTC | Line pressure control solenoid valve | Shift solenoid valve | Pressure control solenoid valve | |||
|---|---|---|---|---|---|---|
| A | B | A | C | D | ||
| P1718 | |
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| P1719 | |
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