Inspection and Verification

Verify the customer concern by operating the transmission external control.

Visually inspect for obvious signs of mechanical and electrical damage; refer to the following charts:

VISUAL INSPECTION CHART

Mechanical	Electrical
Shift lock actuator Transmission control switch SST (+/-) switches Shift cable and bracket Park sense switch	Central junction box (CJB) fuse: 204 (5A) 205 (5A) Damaged wiring harness Loose or corroded connections Powertrain control module (PCM)

DIAGNOSTIC TROUBLE CODE CHART

Five Digit DTC	Component	Description	Condition	Symptom	Action
P0815	SST +/-	SST +/- Circuit Input Signal Failed	PCM has detected an incorrect voltage SST input.	May not be able to shift in manual mode.	Go To PINPOINT TEST C .
P1780	TCS	TCS Input Incorrect Per Selected Position	TCS voltage incorrect.	No overdrive cancel when range selector is moved.	Go To PINPOINT TEST A .

If the concern is not visually evident, determine the symptom. GO to SYMPTOM CHART .