I have a P1193 Possible bad IAT connector, I checked the voltage
and it came up at 00.6 . How do i fix this problem of a high voltage ? It is a 2003 Chrysler Voyager LX with a 3.3 L Engine.
Chrysler Code p1193 – Inlet Air Temperature Sensor Voltage High
When monitored: With the ignition on and the battery voltage greater than 10.4 volts.
Set Condition: The inlet air temperature (IAT) sensor circuit voltage at the PCM goes above 4.9 volts for 5 seconds.
Code P1193 Possible Causes
- IAT Sensor voltage above 4.6 volts
- (K21) IAT sensor signal circuit shorted to battery voltage
- IAT Sensor internal failure
- (K21) IAT Sensor signal circuit open
- (K900) Sensor ground circuit open
- PCM
How to test the IAT for Code P1193
- Turn the ignition ON. With the DRBIII, read the IAT voltage. Is the voltage above 4.6 volts?
- Yes -> Go To 2
- No -> Refer to the intermittent condition and perform Powertrain Verification Test Ver – 5
2. Turn the ignition OFF. Disconnect the IAT Sensor harness connector. Turn the ignition ON. Measure the voltage of the (K21) IAT Sensor Signal circuit in the IAT Sensor harness connector.
Is the voltage above 5.2 volts?
- Yes -> Repair the short to voltage in the (K21) IAT Sensor Signal circuit. then Perform Powertrain Verification Test Ver – 5.
- No -> Go To 3
3. Turn the ignition OFF. Disconnect the IAT harness connector. Connect a jumper wire between the (K21) IAT Sensor Signal circuit and the (K900) Sensor Ground circuit in the IAT harness connector. Turn the ignition ON. With the DRBIII, read IAT Voltage.
Is the voltage below 1.0 volts?
- Yes -> Replace the IAT Sensor. Perform Powertrain Verification Ver – 5.
- No -> Go To 4
4. Turn the ignition OFF. Disconnect the IAT harness connector. Disconnect the PCM harness connector. Measure the resistance of the (K21) IAT Sensor Signal circuit between the IAT Sensor harness connector and the PCM harness connector.
Is the re4sistance below 5.0 ohms?
- Yes -> Go To 5
- No -> Repair the open in the (K21) Sensor Signal circuit. Perform Powertrain Verification Ver – 5.
5. Turn the ignition OFF. Disconnect the IAT Sensor harness connector. Disconnect the PCM harness connector. Measure the resistance of the (K900) IAT Sensor Ground circuit between the IAT Sensor harness connector and the PCM harness connector.
Is the re4sistance below 5.0 ohms?
- Yes -> Go To 6
- No -> Repair the open in the (K900) Sensor Ground circuit. Perform Powertrain Verification Ver – 5.
6. NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits. If there are no possible causes remaining, view repair.
- REPAIR – Replace and program the PCM.
- Perform Powertrain Verification Ver – 5.