CAN register and communication line inspection

■ CAN register and communication line inspection 1 

1. Ignition "OFF".
2. Connect all module connectors in proper locations.
3. Measure resistance between terminal 3 and 11 of Data Link Connector (DLC).

   Specification:  approx. 60 Ω

4. Is the measured resistance within specification?

   YES 

   • Check Module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.
   • go to "CAN register and communication line inspection 2" procedure below.

   NO 

   • If the measured value is out of specification, repair or replace 120Ω CAN register (Inside of ECM/PCM and CLU) and then, go to "Verification of Vehicle Repair " procedure.
   • If the measured value is lower than 10Ω, repair or replace CAN High and CAN Low are short each other. And then, go to "Verification of Vehicle Repair " procedure.
   • go to "CAN register and communication line inspection 2" procedure below.

■ CAN register and communication line inspection 2 

1. Ignition "OFF".
2. Disconnect ECM/PCM and CLU main harness connector.
3. Measure resistance between Pin No. 85 (High) terminal and Pin No. 63 (Low) terminal of ECM. (GAMMA 1.6 T-GDI)
4. Measure resistance between Pin No. 77 (High) terminal and Pin No. 60 (Low) terminal of PCM. (THETA-II 2.0 T-GDI)
5. Measure resistance between Pin No. 77 (High) terminal and Pin No. 60 (Low) terminal of PCM. (THETA-II 2.4 GDI)
6. Measure resistance between Pin No. 32 (High) terminal and Pin No. 33 (Low) terminal of CLU.

   Specification:  About 120 Ω

7. Is the measured resistance within specification?

   YES 

   • go to "CAN communication line inspection " procedure.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • problem still occurs, replace, ECM/PCM or CLU and then go to, "Verification of Vehicle Repair " procedure.