Diagnostic Test

CHECK THE MODULE STATUS ON THE CAN C BUS
1. Turn the ignition on.
2. With the scan tool, read the CAN topology on the Vehicle View screen.
  Does the Vehicle View screen indicate that the Module is active on the bus?
  
  Yes
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
  No
  - Go To 2
CHECK THE (F948) FUSED IGNITION CIRCUIT FOR AN OPEN OR SHORT TO GROUND
NOTE:
The CAN bus will remain active with the scan tool connected and the ignition off.

NOTE:
Leave the scan tool connected

and on the Vehicle View screen.
1. Turn the ignition off.
2. Disconnect the Electronic Steering Lock (ESL) Module harness connector.
3. With a 12-volt test light connected to ground, check the (F948) Fused Ignition circuit at the ESL Module harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (F948) Fused Ignition circuit for an open or short to ground.
  - Perform the ESL MODULE VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
CHECK THE (Z935) GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. With a 12-volt test light connected to 12 volts, check the (Z935) Ground circuit at the ESL Module harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the (Z935) Ground circuit for an open or high resistance.
  - Perform the ESL MODULE VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
CHECK THE (D253) CAN C2 BUS (+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the voltage on the (D253) CAN C2 Bus (+) circuit at the ESL Module harness connector.
  Is the voltage below 2.5 volts?
  
  Yes
  - Repair the (D253) CAN C2 Bus (+) circuit for an open or high resistance.
  - Perform the ESL MODULE VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (D252) CAN C2 BUS (-) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the voltage on the (D252) CAN C2 Bus (-) circuit at the ESL Module harness connector.
  Is the voltage below 1.3 volts?
  
  Yes
  - Repair the (D252) CAN C2 Bus (-) circuit for an open or high resistance.
  - Perform the ESL MODULE VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .
  No
  - Replace the Electronic Steering Lock (ESL) Module in accordance with the Service Information.
  - Perform the ESL MODULE VERIFICATION TEST. Refer to ELECTRONIC STEERING LOCK (ESL) VERIFICATION TEST .