For 1990-2009 cars
Automatic Transmission Components
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice

### Circuit Description

The WOT switch signal circuit pulls up to B+ within the TCM. The switch connects to ground. When you depress the accelerator pedal beyond the equivalent of about a 89% throttle angle, the switch closes, pulling the signal voltage low. The TCM interprets this signal voltage as WOT Active.

### Conditions for Running the DTC

• | No Throttle position sensor default values are set.

• | The engine speed is greater than 500 RPM but less than 8160 RPM.

• | The throttle angle is less than 89%.

• | The WOT is Active.

### Conditions for Setting the DTC

A DTC P1835 stores.

### Action Taken When the DTC Sets

• | The MIL/STL will not illuminate.

• | The TCM memory stores the DTC at the time of the first failure.

### Conditions for Clearing the MIL/DTC

• | The Kickdown function enables with the throttle limit.

• | A History DTC clears after forty consecutive warm-up cycles if no failures are present by this or any other non-emission related diagnostic.

• | The scan tool clears the MIL/DTC.

### Diagnostic Aids

Use the Connector Test Adapter Kit J 35616-A for any test that requires probing the TCM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.

Check for the following conditions:

• | Poor connections at the TCM or at the component. Inspect the harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. Refer to Engine Electrical, Troubleshooting Procedures, Checking Terminal Contact for proper procedure.

• | Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving any related connectors and any wiring harnesses. A change in the display may help to locate the fault.

### Test Description

The number(s) below refer to the step number(s) on the Diagnostic Table.

1. In the previous step, the parameter did not change during the functional test. This step determines whether the circuit has failed high or failed low.

#### DTC P1835 - WOT Switch Circuit

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to Step 2 | Go to Powertrain On Board Diagnostic (OBD) System Check
2 |

1. Turn off the engine.
2. Turn on the ignition.
3. Observe the WOT Switch on the scan tool.
4. Depress the accelerator pedal fully and then release several times while observing the scan tool.

Does the WOT Switch indicate Off when the accelerator pedal is released, and On when the accelerator is at WOT?

--

No trouble found

Refer to Diagnostic Aids

Go to Step 3

3 | Does the WOT Switch parameter always indicate Off? | -- | Go to Step 4 | Go to Step 7
4 |

1. Disconnect the WOT switch.
2. Use a fused jumper in order to jumper the signal circuit to the ground circuit in the WOT switch harness connector.

Does the scan tool indicate On?

--

Go to Step 12

Go to Step 5

5 | Use a fused jumper in order to jumper the signal circuit to a known good ground. Does the scan tool indicate On? | -- | Go to Step 9 | Go to Step 6
6 |

1. Turn off the ignition.
2. Disconnect the TCM.
3. Use a DVM J 39200 in order to check the continuity of the WOT switch signal circuit from the WOT switch harness connector to the TCM harness connector.

Is the continuity indicated?

--

Go to Step 14

Go to Step 10

7 | Disconnect the WOT switch. Does the scan tool indicate Off? | -- | Go to Step 13 | Go to Step 8
8 |

1. Turn off the ignition.
2. Disconnect the TCM.
3. Use a DVM J 39200 in order to check the continuity between the WOT switch signal circuit and ground.

Is the continuity indicated?

--

Go to Step 11

Go to Step 15

9 | Repair the ground circuit to the WOT switch. Is the action complete? | -- | Go to Step 16 | --
10 | Repair the open/high resistance WOT switch signal circuit. Is the action complete? | -- | Go to Step 16 | --
11 | Repair the WOT switch signal circuit shorted to ground. Is the action complete? | -- | Go to Step 16 | --
12 | Check the WOT harness connector for a poor connection or poor terminal tension. Refer to Engine Electrical, Troubleshooting Procedures, Checking Terminal Contact for proper procedure. Was a problem found and corrected? | -- | Go to Step 16 | Go to Step 13
13 | Replace the WOT switch. Is the action complete? | -- | Go to Step 16 | --
14 | Check the TCM harness connector for a poor connection or poor terminal tension. Refer to Engine Electrical, Troubleshooting Procedures, Checking Terminal Contact for proper procedure. Was a problem found and corrected? | -- | Go to Step 16 | Go to Step 15
15 | Replace the TCM. Refer to Automatic Transmission, On Vehicle Service, TCM . Is the action complete? | -- | Go to Step 16 | --
16 |

1. Clear the DTCs with the scan tool.
2. Turn off the ignition for 15 seconds.
3. Start the engine.
4. Operate the vehicle within the conditions for this diagnostic to run. Refer to Conditions for Running the DTC.
5. Check for any DTCs.

Is DTC P1835 set?

--

Go to Step 2

Go to Step 17

17 | Were there any additional DTCs noted during the Powertrain or Transmission OBD System Check that have not been diagnosed? | -- | Go to the applicable DTC table | Go to Step 18
18 | Does the Transmission now function properly? | -- | System OK | Go to Functional Test