LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2022 >> Gladiator Mojave, Part Time T/Case Control, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 33 (3.0L Diesel - DTCS P26A3-00 To U0121-00) >> DTC Troubleshooting >> P26E4-00-Starter Control 2 Circuit >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
  2. CHECK THE PCR CONTROL RELAY AND PDC FOR PROPER OPERATION 
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, back probe the PCR Control Relay (T762) Control circuit at the PDC connector.
    3. Using a 12-volt test light connected to ground, probe the PCR Control Relay (T760) Output circuit at the PDC connector to verify the relay is closing when energized. The test light should illuminate when the relay is closed.
      NOTE:

      The relay may also make an audible click when closing.

      Does the PCR Control Relay close when the control circuit is grounded?

      Yes 

      • Go To  3

      No 

      • Go To  5
  3. CHECK THE PCR CONTROL RELAY (T762) CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the PCR Control Relay (T762) Control circuit between the PDC harness connector and the PCM C1 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the PCR Control Relay (T762) Control circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  4. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

  5. CHECK THE BATTERY SUPPLY VOLTAGE TO THE PDC 
    1. Using the wiring information as a guide, measure the main Battery supply voltage at the PDC terminal.

      Is Battery voltage present?

      Yes 

      • Go To  6

      No 

  6. CHECK THE BATTERY SUPPLY VOLTAGE TO THE PCR CONTROL RELAY COIL 
    1. Remove the Stop/Start Relay form the PDC.
    2. Connect a fused jumper between terminal 30 and terminal 87 of the Stop/Start Relay.
    3. Using the wiring information as a guide, back probe and measure the voltage on the PCR Control Relay (T762) Control circuit at the PDC terminal.

      Is Battery voltage present?

      Yes 

      • Replace the Power Distribution Center (PDC) in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

      No 

      • Check all fuses in the PDC. If a fuse is found to be open, replace the fuse and retest. If no problems are found with the fuses, replace the Power Distribution Center (PDC) in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
scientia non olet · About LEMON Manuals