Diagnostic Information For MIL Illuminated Wit DTC P1825 Or P182E Found Current Or As History Code In TCM No PRNDL Display Potential No Engine Crank - keywords adjust cable shift

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The following diagnostic information will aid the technician if the MIL is illuminated with DTC P1825, P182E or P1915. The DTC may be current or a history code in the TCM along with a no PRNDL display and the potential for no engine crank.

1. Use the Tech 2® to capture and record Freeze Frame/Failure Data for all DTCs set. Review the data to determine:

•	Vehicle speed, commanded gear, transmission temperature, throttle position, transmission ratio, transmission input and output speed sensor RPM when DTC set (use to attempt to duplicate failure)

•	IMS A/B/C/P and IMS state.

2. Using the Tech 2®, navigate to transmission data and scroll down to IMS. With the ignition ON and the engine OFF, observe the IMS A/B/C/P switch states and IMS state for each shift lever detent position. The IMS logic chart is available in document 1413812 and shows the correct states.
3. If all IMS readings are normal, monitor the PNP status in the engine data list to isolate a possible open or short to ground on the dedicated PNP signal between the TCM and the ECM.
4. If the DTC does not reset and original freeze frame data reports an IMS A/B/C/P position of LLLH the condition is most likely caused by an incorrectly adjusted shift linkage. Important: Typical Freeze Frame operating conditions: ISS and OSS both =0 RPM or ISS and OSS both >0 RPM and/or vehicle is in some drive gear (transmission gear ratio matches one of the forward gear ratio's)

•	Using a Tech2, with the shift lever in the D position, pull backward firmly / hard on the shifter to verify that the IMS A/B/C/P position remains at the correct HLLH reading. If it toggles to LLLH or LLLL the linkage is not adjusted properly.

•	Perform Shift Control Linkage Adjustment as detailed in eSI

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.