What are the overdrive diagnostic codes for 1995 Jeep Grand Cherokee?

Answer 1

A. The first thing we have to do is get the codes out of the Transmission Control Module. Diagnostic trouble flash codes are provided for diagnostic purposes. The lamp in the Overdrive Off Switch is used to signal the various flash codes.To view flash codes, proceed as follows:

Turn ignition key ON and OFF three times, finally leaving the key in the ON position. Leave the Overdrive Off Switch in the normal overdrive (ON) position.

Immediately begin counting the number of flashes displayed by the Overdrive Off Switch indicator lamp.

Flash codes will correspond to Powertrain Control Module codes in duration and spacing.

A code 55 identifies the end of flash code transmission.

Code 11 - No Engine Speed Sensor Signal

Code 12 - No Output Shaft Sensor Signal

Code 13 - No Vehicle Speed Sensor Signal

Code 14 - Governor Pressure Sensor Signal

Code 15 - Throttle Position Signal

Code 16 - Transmission Temperature Sensor

Code 17 - Overdrive Off Switch Circuit

Code 18 - System Voltage Out of Limits

Code 19 - Standby Voltage Out of Limits

Code 21 - Governor Pressure Solenoid Circuit

Code 22 - 3-4 Solenoid Circuit

Code 23 - Torque Converter Clutch Circuit

Code 24 - Overdrive Off Lamp Circuit

Code 25 - EEPROM Checksum Error

Code 26 - Governor Pressure Sensor Offset Drift

Code 55 - End of Message