Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read ESL DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read ESL DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR BCM DTCS
1. With the scan tool, check for BCM DTCs.
  Are any BCM communication or voltage related DTCs set?
  
  Yes
  - Repair BCM DTCs. Refer to DIAGNOSTIC CODE INDEX .
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR AN OPEN FUSE F49 (7.5A)
1. Turn the ignition off.
2. Remove Fuse F49 (7.5A) from the BCM.
3. Inspect Fuse F49 (7.5A) for an open.
  Is Fuse F49 (7.5A) open?
  
  Yes
  - Go To 6
  No
  - Go To 4
CHECK THE (F948) FUSED IGNITION CIRCUIT VOLTAGE
1. Install Fuse F49 (7.5A) in the BCM.
2. Disconnect the ESL Module harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (F948) Fused Ignition circuit at the ESL Module harness connector.
  Is the voltage above 9.5 volts?
  
  Yes
  - Go To 5
  No
  - Go To 8
CHECK THE (F948) FUSED IGNITION CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
1. Turn the ignition off.
2. Disconnect the BCM C7 harness connector.
3. Check for continuity between the (F948) Fused Ignition circuit and all other circuits at the BCM C7 harness connector.
  Is there continuity between the (F948) Fused Ignition circuit and any other circuit?
  
  Yes
  - Repair the (F948) Fused Ignition circuit for a short to another circuit.
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Go To 9
CHECK THE (F948) FUSED IGNITION CIRCUIT FOR A SHORT TO GROUND
1. Disconnect the ESL Module harness connector.
2. Remove Fuse F49 (7.5A) from the BCM.
3. Check for continuity between ground and the (F948) Fused Ignition circuit at the ESL harness connector.
  Is there continuity between ground and the (F948) Fused Ignition circuit?
  
  Yes
  - Repair the (F948) Fused Ignition circuit for a short to ground and replace Fuse F49 (7.5A).
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Go To 7
CHECK FOR A SHORTED BCM
1. Install a new Fuse F49 (7.5A) in the BCM.
2. Turn the ignition on.
3. Check Fuse F49 (7.5A) for an open.
  Is the fuse open?
  
  Yes
  - Go To 10
  No
  - Go To 9
CHECK THE (F948) FUSED IGNITION CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the BCM C7 harness connector.
3. Measure the resistance of the (F948) Fused Ignition circuit between the ESL Module harness connector and the BCM C7 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 10
  No
  - Repair the (F948) Fused Ignition circuit for an open or high resistance.
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
CHECK RELATED ESL MODULE HARNESS CONNECTIONS
1. Disconnect all Electronic Steering Lock (ESL) harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. 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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all ESL harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read ESL DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Electronic Steering Lock (ESL) in accordance with the Service Information.
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  - Test complete.
CHECK RELATED BCM HARNESS CONNECTIONS
1. Disconnect all BCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. 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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all BCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read ESL DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Perform the ESL VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  - Test complete.