P183F

P183F-INTERNAL MODE SWITCH 1-2 CORRELATION





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

Theory of Operation

The Internal Mode Switch (IMS) is an internal sliding contact switch attached to the valve body. Each switch can be either open or closed, depending on the shift lever position. The Hybrid Control Processor (HCP) can decode this information and determine the shift lever position. Each shift lever position has a certain combination of switches, which will be open and closed. When a switch is open, the HCP will read High. When a switch is closed the HCP will read Low. There are 5 switches, therefore: there are many possible combinations of open and closed switches. The remainder of the codes should never occur, these are called invalid codes. The Transmission Electro Hydraulic Control Module (TEHCM) has its own Transmission Range inputs that are broadcast over the bus. The HCP compares the TEHCM range state to the direct input state. The DTC sets if the TEHCM current gear state does not match the HCP current gear state. The following charts shows the normal switch states for both switches in each shift lever position.

- When Monitored:
Ignition on.

- Set Condition:
The DTC will set if TEHCM state does not match the HCP state.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.











1. CHECK FOR OTHER DTCS

WARNING: On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury Service Precautions

1. With the scan tool, check for other Transmission Range or Loss of Communication DTCs

Are there any other Transmission Range or Loss of Communication DTCs?

Yes

- Perform the appropriate diagnostic procedure before continuing with this procedure for P183F.

No

- Go To 2

2. PERFORM SHIFT LEVER TEST
1. With the scan tool, perform the Shift Lever Position Test.

Did the shift lever test pass?

Yes

- Go To 4

No

- Go To 3

3. CHECK THE SHIFT CABLE AND LINKAGE
1. Check the shift cable and linkage for proper adjustment.

Is the shift cable and linkage properly adjusted?

Yes

- Inspect the internal transmission wire harness, connectors and terminals for corrosion, damage, or terminal push out. If no problems are found, replace the Transmission Range Sensor (TRS).
- Perform the TPIM VERIFICATION TEST Traction Power Inverter Module (TPIM) Verification Test.

No

- Adjust the shift cable and linkage.
- Perform the TPIM VERIFICATION TEST Traction Power Inverter Module (TPIM) Verification Test.

4. CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wiring and connectors while checking for shorted and open circuits.
4. With the scan tool, check the DTC Environmental Data to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the TPIM VERIFICATION TEST Traction Power Inverter Module (TPIM) Verification Test.

No

- Test complete.