MIL Circuit Troubleshooting
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MIL Circuit Troubleshooting
1.
Gauge control module check:
Gauge control module check
?1.
Turn the vehicle to the ON mode.
?2.
Do the gauge control module self-diagnostic function
.
Does the MIL flash?
YES
Go to step 2.
NO
Substitute a known-good gauge control module
, then recheck. If the symptom/indication goes away with a known-good gauge control module,
replace the original gauge control module
.?
2.
PCM check:
PCM check
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Connect the HDS to the data link connector
.
?3.
Turn the vehicle to the ON mode.
?4.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
SCS
Short
Do the current condition(s) match the threshold?
YES
Go to step 3.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or
substitute a known-good PCM
.?
3.
Shorted wire check (SCS line):
Shorted wire check (SCS line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Jump the SCS line with the HDS, and wait more than 1 minute.
SCS Short
?3.
Disconnect the following connector.
PCM connector A (50P)
?4.
Disconnect the HDS from the data link connector.
?5.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PCM connector A (50P): disconnected
Test point 1
PCM connector A (50P) No. 27
Test point 2
Body ground
Is there continuity?
YES
Repair a short in the SCS wire between the PCM (A27) and the data link connector.?
NO
The SCS wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or
substitute a known-good PCM
.?
Troubleshooting Start