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Malfunction Indicator Lamp Does Not Come On With Ignition Switch On And Engine Stop (But Engine Can Be Started): Troubleshooting

NOTE:
  • Before performed troubleshooting, be sure to read the Precautions of ECM Circuit Inspection.
  • When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the special tool to ECM and/or the ECM connectors referring to INSPECTION OF ECM AND ITS CIRCUITS .
TROUBLESHOOTING CHART

Step Action YES NO
1  MIL power supply check 
  1. Turn ignition switch to ON position.

Do other warning lights come ON? 		 Go to Step 2. Go to Step 4.
2  DTC check 
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ON ignition switch and check DTC.

Is there DTC(s) U0073 and/or U0121? 		 Go to applicable DTC diagnostic flow chart. Go to Step 3.
3  DTC check in ABS or electronic stability program control module 
  1. Check DTC in ABS or ESP® control module.

Is there DTC(s) U1073 and/or U1100? 		 Go to applicable DTC diagnostic flow chart. Substitute a known-good combination meter and recheck. If MIL still remains OFF, substitute a known-good ECM and recheck.
4  Combination meter power supply and ground circuit check 
  1. Turn ignition switch OFF position.
  2. Disconnect connector from combination meter.
  3. Check for proper connection to power supply and ground terminals of combination meter connector.
  4. If connections are OK, check that combination meter circuit is as follows.
    • Circuit voltage between combination meter power supply terminal and vehicle body ground is 10 - 14 V.
    • Wiring harness resistance of combination meter ground terminal and vehicle body ground is less than 3 Ω.

Are they in good condition? 		 Go to Step 5. Repair or replace.
5  CAN communication line circuit check 
  1. Check CAN communication circuit between control modules for open, short, high resistance and connections referring to Step 3 of DTC U0073: CONTROL MODULE COMMUNICATION BUS OFF 

Is circuit in good condition? 		 Substitute a known-good combination meter and recheck. If MIL still remains OFF, substitute a known-good ECM and recheck. Repair or replace.
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