Lexus ES: Shift Paddle Switch Circuit
DESCRIPTION
Moving the shift lever to S enables the shift range to be selected. The shift range can be selected by operating the "+" or "-" shift paddle switch.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (SPORT SHIFT SWITCH STATUS) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List.
(e) According to the display on the Techstream, read the Data List.
Powertrain > Engine > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Sport Shift Up SW | Sport shift up switch status | ON or OFF |
| - |
| Sport Shift Down SW | Sport shift down switch status | ON or OFF |
| - |
| Tester Display |
|---|
| Sport Shift Up SW |
| Sport Shift Down SW |
| Result | Proceed to |
|---|---|
| Data List values are normal | A |
| Data List values are not normal | B |
| A | .gif) | CHECK FOR INTERMITTENT PROBLEMS |
|
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| 2. | CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH CIRCUIT) |
(a) Disconnect the A28 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A28-20 (SFTU) - A28-28 (ECCS) | "+" (Up shift) shift paddle switch operated and held | Below 2.5 Ω |
| "+" (Up shift) shift paddle switch not operated | 1 MΩ or higher | |
| A28-19 (SFTD) - A28-28 (ECCS) | "-" (Down shift) shift paddle switch operated and held | Below 2.5 Ω |
| "-" (Down shift) shift paddle switch not operated | 1 MΩ or higher |
| NG | | GO TO STEP 4 |
|
| 3. | CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) |
(a) Disconnect the A28 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A28-10 (E1) - Body ground | Always | Below 1 Ω |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND) |
| 4. | CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) |
(a) Disconnect the G20 spiral cable sub-assembly connector.
(b) Disconnect the A28 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A28-20 (SFTU) - G20-8 (SUP) | Always | Below 1 Ω |
| A28-19 (SFTD) - G20-1 (SDN) | Always | Below 1 Ω |
| A28-28 (ECCS) - G20-2 (ECC) | Always | Below 1 Ω |
| A28-20 (SFTU) or G20-8 (SUP) - Body ground | Always | 10 kΩ or higher |
| A28-19 (SFTD) or G20-1 (SDN) - Body ground | Always | 10 kΩ or higher |
| A28-28 (ECCS) or G20-2 (ECC) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) |
|
| 5. | INSPECT SPIRAL CABLE SUB-ASSEMBLY |
(a) Inspect the spiral cable sub-assembly.
Click here
| NG | | REPLACE SPIRAL CABLE SUB-ASSEMBLY |
|
| 6. | INSPECT SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY) |
| (a) Remove the shift paddle switch LH (transmission shift switch assembly). Click here |
|
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-1 (SDN) - A-2 (ECC) | "-" (Down shift) shift paddle switch operated and held | Below 2.5 Ω |
| "-" (Down shift) shift paddle switch not operated | 1 MΩ or higher | |
| A-1 (SDN) - A-3 (ECC1) | "-" (Down shift) shift paddle switch operated and held | Below 2.5 Ω |
| "-" (Down shift) shift paddle switch not operated | 1 MΩ or higher |
| NG | | REPLACE SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY) |
|
| 7. | INSPECT SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY) |
| (a) Remove the shift paddle switch RH (transmission shift switch assembly). Click here |
|
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| B-1 (SUP) - B-2 (ECC) | "+" (Up shift) shift paddle switch operated and held | Below 2.5 Ω |
| "+" (Up shift) shift paddle switch not operated | 1 MΩ or higher |
| NG | | REPLACE SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY) |
|
| 8. | INSPECT NO. 1 SWITCH WIRE |
| (a) Install the transmission shift switch assembly. Click here |
|
(b) Disconnect the z5 No. 1 switch wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| z5-2 (SUP) - z5-3 (ECC) | "+" (Up shift) shift paddle switch operated and held | Below 2.5 Ω |
| "+" (Up shift) shift paddle switch not operated | 1 MΩ or higher | |
| z5-4 (SDN) - z5-3 (ECC) | "-" (Down shift) shift paddle switch operated and held | Below 2.5 Ω |
| "-" (Down shift) shift paddle switch not operated | 1 MΩ or higher |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE NO. 1 SWITCH WIRE |
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