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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "Electronic Stability Program Check" performed?  Go to Step 2. Go to ELECTRONIC STABILITY PROGRAM CHECK .
2  DTC check for ESP® 
  1. Check DTC for ESP®.

Is DTC U1140 and DTC U1073 detected together? 		 Go to DTC U1073: CONTROL MODULE COMMUNICATION BUS OFF  for troubleshooting. Go to Step 3.
3  DTC check for BCM 
  1. Check DTC for BCM.

Is DTC U1073 detected? 		 Go to DTC U1073 (NO. 1073): CONTROL MODULE COMMUNICATION BUS OFF  for troubleshooting. Go to Step 4.
4  Check each control module connectors 
  1. Check connection of connectors of all control modules communicating by means of CAN.
  2. Check DTC for ESP®.

Is DTC U1140 detected? 		 Go to Step 4. Check for intermittent trouble referring to INTERMITTENT AND POOR CONNECTION INSPECTION .
5  CAN communication circuit check 
  1. Turn ignition switch to OFF position.
  2. Disconnect connectors of ESP® control module, BCM and ECM communicating by means of CAN.

Is each CAN communication circuit between ESP® control module, BCM and ECM opened, shorted or high resistance? 		 Repair or replace the CAN communication line. Go to Step 6.
6  DTC check for ESP® 
  1. Turn ignition switch to OFF position.
  2. Disconnect connectors of all control modules communicating by means of CAN.
  3. Connect connectors to ESP® control module and BCM.
  4. Check DTC for ESP®.

Is DTC U1140 detected? 		 Go to Step 7. Go to Step 9.
7  DTC Check for ECM 
  1. Check DTC for ECM.

Is DTC U0140 detected? 		 Go to Step 8. Check ESP® control module power and ground circuit. If circuit is OK, substitute a known-good ESP® control module and check DTC.
8  CAN communication circuit check 
  1. Turn ignition switch to OFF position
  2. Disconnect connectors of ESP® control module, BCM and ECM communicating by means of CAN.
  3. Measure resistance at following terminals.
    • Between "WHT/BLU" and "WHT" wire terminals of ESP® control module connector
    • Between "WHT/RED" and "RED" wire terminals of ESP® control module connector

Is resistance below 1 Ω? 		 Check BCM power and ground circuit. If circuit is OK, substitute a known-good BCM and check DTC. Substitute a known-good ESP® control module and check DTC.
9  CAN communication circuit check 
  1. Turn ignition switch to OFF position.

Is each CAN communication circuit between disconnected control modules (other than ESP® control module and BCM) opened, shorted or high resistance? 		 Repair or replace the CAN communication line. Go to Step 10.
10  DTC check for ESP® 
  1. Connect connectors of disconnected control modules communicating by means of CAN.
  2. Disconnect each connector.
    • ECM
    • TCM (for A/T model)
    • BCM
    • 4WD control module (if equipped)
    • Keyless start control module (if equipped)
    • Steering angle sensor
  3. Check DTC for ESP®.

Is DTC U1140 detected? 		 Check ESP® control module power and ground circuit. If circuits are OK, substitute a known-good ESP® hydraulic unit/control module assembly and check DTC. Check applicable control module power and ground circuit. If circuit is OK, substitute a known-good applicable control module and check DTC.
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