Question about Jeep Cherokee
The DTC 24 indicates the
TPS is either too high or too low. Obtaining the codes with a scan tool will
narrow it down to exactly which it is. DTC 12 indicates battery input to the
Powertrain Control Module (PCM) was disconnected during the last 50 key starts.
So it would seem that you tried to clear the code by disconnecting the
battery.The TPS supplies the PCM and Transmission Control Module (TCM) with a
signal for proper operation. If the signal is missing or bad, then it is very
possible the transmission will not shift into Overdrive.With the key ON, you should have about 4.5 volts at the orange (or
white/black) wire at the TPS connector. If not, you have a problem with the PCM
or the wire going from the PCM to the TPS.If it's good then check voltage at the
orange/dark blue wire. Voltage should go from 0 to 5.0 in a smooth and steady
manner as you open the throttle. If it doesn't, you have a bad TPS. Then check
the TPS ground at the brown/yellow wire and make sure the ground is good. If
not, repair the ground wire as required.I would recommend using an analog
(needle type) voltmeter to do these tests. A digital meter is too slow to
properly see the voltage rise.We need to try and get codes out of the
Transmission Control Module (TCM). 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-OFF-ON-OFF-ON 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. And the possible codes are:
11 No Engine Speed Sensor Signal-12 No Output Shaft Sensor Signal-13 No Vehicle Speed Sensor Signal
14 Governor Pressure Sensor Signal-15 Throttle Position Signal-16 Transmission Temperature Sensor
17 Overdrive Off Switch Circuit-18 System Voltage Out of Limits-19 Standby Voltage Out of Limits
21 Governor Pressure Solenoid Circuit-22 3-4 Solenoid Circuit-23 Torque Converter Clutch Circuit
24 Overdrive Off Lamp Circuit-25 EEPROM Checksum Error
26 Governor Pressure Sensor Offset Drift-55 End of Message
If you still get no codes, then we have to explore a mechanical problem inside the transmission. Possibly the overdrive solenoid not venting or a lower valve body malfunction.
Instead of getting dtc codes from the display of jeep.Get the actual codes detected before going for any part replacement.
If the problem repeats again n again then its advisable to get car scanned at diagnosis center to get error codes, At diagnosis center you will receive the error code.As per the error code it will detect the exact faulty part in the car due to which the problem is occurring.For more help :--- at www.autozone.com its absolutely free to get car scanned.
Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
Posted on Jul 19, 2010
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Posted on Jan 02, 2017
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