Symptom Troubleshooting Chart - Automatic Transmission External Controls

SYMPTOM TROUBLESHOOTING CHART - AUTOMATIC TRANSMISSION EXTERNAL CONTROLS

Problem	Possible Cause	Action
Shift interlock system does not release/lock properly	Clutch pedal position (CPP) switch connector jumper missing or incorrectly installed. Circuit(s) Fuse(s) Shift lock actuator Brake pedal position (BPP) switch	See AUTOMATIC TRANSMISSION EXTERNAL CONTROLS PINPOINT TEST 1: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE / LOCK PROPERLY .
Shift control is out of proper gear relationship	Transmission shift cable and bracket Retainer bracket Shift control linkage	See AUTOMATIC TRANSMISSION EXTERNAL CONTROLS PINPOINT TEST 2: SHIFT CONTROL IS OUT OF PROPER GEAR RELATIONSHIP .
Transmission range indicator does not correspond to the gear	Transmission shift cable bracket	Tighten bolts holding transmission shift cable bracket. See SHIFT CABLE AND BRACKET ADJUSTMENT .
Transmission control indicator linkage		Adjust PRNDL at the steering housing. See SHIFT CABLE AND BRACKET ADJUSTMENT .
Transmission shift cable loose from the transmission retainer bracket		Reinstall transmission shift cable into bracket. Replace if damaged. See SHIFT CABLE AND BRACKET REMOVAL / INSTALLATION .
Shift linkage		Verify the transmission shift cable adjustment. Adjust the transmission shift cable if necessary. See SHIFT CABLE AND BRACKET ADJUSTMENT . Verify digital transmission range (DTR) sensor for proper adjustment. See DIGITAL TRANSMISSION RANGE SENSOR REMOVAL / INSTALLATION .
Clip securing the transmission shift cable to the shift control selector lever		Install the clip properly.
	Internal transmission damage	Repair as necessary
Transmission range indicator lamp does not illuminate	Bulb Circuit(s)	See SYMPTOM TROUBLESHOOTING CHART -- INSTRUMENT CLUSTER .
Transmission Control (OD ON/OFF) switch (TCS) inoperative	Blown fuse Damaged TCS or TCS not cycled during self test Damaged powertrain control module (PCM) Internal transmission concerns Circuitry open/shorted	See TRANSMISSION CONTROL SWITCH (TCS) REMOVAL / INSTALLATION . See AUTOMATIC TRANSMISSION EXTERNAL CONTROLS PINPOINT TEST 3: THE TRANSMISSION CONTROL SWITCH (OVER-DRIVE OD, ON/OFF) IS NOT OPERATING PROPERLY .
Transmission control (OD ON/OFF) indicator lamp (TCIL) does not illuminate	Burned out bulb Circuitry open/shorted Damaged powertrain control module	See AUTOMATIC TRANSMISSION EXTERNAL CONTROLS PINPOINT TEST 4: TRANSMISSION CONTROL INDICATOR LAMP (TCIL) (OVER-DRIVE OD, ON/OFF) DOES NOT ILLUMINATE .
Transmission control (OD ON/OFF) indicator lamp (TCIL) stays illuminated or flashes	Circuitry open/shorted Damaged powertrain control module	See AUTOMATIC TRANSMISSION EXTERNAL CONTROLS PINPOINT TEST 5: TRANSMISSION CONTROL INDICATOR LAMP (TCIL) STAYS ILLUMINATED .
Water enters inside the vehicle	Cable assembly grommet	Secure grommet to dash panel.
Torn cable assembly grommet		Install a new transmission selector lever cable.
Excessive shift effort	Cable bracket	Adjust cable. Tighten cable bracket screws.
Transmission selector lever cable		Install a new transmission selector lever cable.
Selector lever will not shift	Selector lever cable	Reinstall transmission selector lever cable.
Lock tab		Repair/ install a new lock tab.
Broken transmission selector lever cable		Install a new transmission selector lever cable.
Internal transmission concerns		Repair as necessary.