Lexus IS250 IS220d GSE20 ALE20 - A960E AUTOMATIC TRANSMISSION
INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
INSPECT TRANSMISSION CONTROL SWITCH
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0705 | (A) Any 2 or more signals of the following are ON simultaneously (2-trip detection logic) P input signal is ON. N input signal is ON R input signal is ON. D input signal is ON. (B) Any 2 or more signals of the following are ON simultaneously (2-trip detection logic) NSW (STAR) input signal is ON. R input signal is ON. D input signal is ON. (C) When any of following conditions is met for 2.0 sec. or more in the S position (2-trip detection logic) NSW (STAR) input signal is ON. P input signal is ON. N input signal is ON. R input signal is ON. (D) All switches are OFF simultaneously for P, R, N and D positions (2-trip detection logic) |
Open or short in park/neutral position switch circuit Park/neutral position switch ECM |
MONITOR DESCRIPTION
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that engine can be started only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N, D, or S). The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
| DATA LIST |
- HINT:
- Using the intelligent tester Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to shorten labor time.
- NOTICE:
- In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
Warm up the engine.
Turn the engine switch off.
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) position.
Turn on the tester.
Select the item "Enter / Powertrain / ECT / Data List".
Follow the instructions on the tester and read the Data List.
| Item | Measurement Item/ Range (display) | Normal Condition | Diagnostic Note |
| Neutral Position SW Signal | PNP Switch Status/ ON or OFF | Shift lever position is; P and N: ON Except P and N: OFF | When the shift lever position displayed on the Intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect. |
| Shift SW Status (R Range) | PNP Switch Status/ ON or OFF | Shift lever position is; R: ON Except R: OFF | ↑ |
| Shift SW Status (P Range) | PNP Switch Status/ ON or OFF | Shift lever position is; P: ON Except P: OFF | ↑ |
| Shift SW Status (N Range) | PNP Switch Status/ ON or OFF | Shift lever position is; N: ON Except N: OFF | ↑ |
| Shift SW Status (D Range) | PNP Switch Status/ ON or OFF | Shift lever position is; D and S: ON Except D and S: OFF | ↑ |
| Sports Mode Selection SW | Sport Mode Select Switch Status/ ON or OFF | Shift lever position is; S, "+" and "-": ON Except S, "+" and "-": OFF | - |
| 1.INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY |
Disconnect the park/neutral position switch connector.
Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.
- Standard resistance:
Shift Position Tester Connection Specified Condition P 2 - 6 and 4 - 5 Below 1 Ω Except P ↑ 10 kΩ or higher R 1 - 2 Below 1 Ω Except R ↑ 10 kΩ or higher N 2 - 9 and 4 - 5 Below 1 Ω Except N ↑ 10 kΩ or higher D, S, "+" and "-" 2 - 7 Below 1 Ω Except D, S, "+" and "-" ↑ 10 kΩ or higher
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| OK | |
| 2.INSPECT TRANSMISSION CONTROL SWITCH |
Connect the park/neutral position switch connector.
Disconnect the transmission control switch connector of shift lock control unit assembly.
Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.
- Standard resistance:
Shift Position Tester Connection Specified Condition S, "+" and "-" 3 - 7 Below 1 Ω Except S, "+" and "-" ↑ 10 kΩ or higher
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| OK | |
| 3.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) |
Connect the transmission control switch connector of shift lock control unit assembly.
Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
- Standard voltage:
Shift Position Tester Connection Specified Condition P and N E4-4 (STAR) - Body ground Below 1 V Except P and N ↑ 10 to 14 V
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| OK | |
| 4.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) |
Disconnect the ECM connector.
Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
- Standard voltage:
Shift Position Tester Connection Specified Condition P E4-6 (P) - Body ground 10 to 14 V Except P ↑ Below 1 V N E4-32 (N) - Body ground 10 to 14 V Except N ↑ Below 1 V R E4-8 (R) - Body ground 10 to 14 V * Except R ↑ Below 1 V D and S E4-9 (D) - Body ground 10 to 14 V Except D and S ↑ Below 1 V S, "+" and "-" A6-9 (S) - Body ground 10 to 14 V Except S, "+" and "-" ↑ Below 1 V
- HINT:
- *: The voltage will drop slightly due to the turning on of the back up light.
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| OK | ||
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