NO. 4 MIL ILLUMINATES
MIL ILLUMINATES POSSIBLE CAUSE TABLE
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
Is the resistance
114-126 ohms
?
4
MIL illuminates
POSSIBLE CAUSE
PCM malfunction
Instrument cluster malfunction
Connector or pin malfunction
Short circuit in wiring harness between CAN-L, CAN-H and GND
Open circuit in CAN wiring harness (CAN-L, CAN-H)
CAN wiring harness (CAN-L, CAN-H) short each other
STEP
INSPECTION
ACTION
1
Start the engine.
Does the MIL turn off?
Yes Troubleshooting completed.
No
Go to the next step.
2
Are there a number of warning lights
illuminated?
Yes Go to Step 4.
No
Go to the next step.
3
Start the instrument cluster input/output check
mode.
Does the MIL turn off with a check code other
than 26?
Yes Inspect the PCM.
No
Replace the instrument cluster.
4
Disconnect the negative battery cable.
Measure the resistance between the DLC-2
terminals F and E.
Is the resistance
54-66 ohms
?
Yes Go to the next step.
No
Go to Step 6.
5
Inspect the DLC-2 terminals F and E for short
to power supply or GND.
Is there any malfunction?
Yes
Inspect the wiring harness and CAN
system-related module. Repair or
replace the malfunctioning part.
No
Replace the instrument cluster.
Turn the ignition switch off.
Inspect the instrument cluster connector
terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).
Are the terminals normal?
Yes Go to the next step.
2007 Mazda MX-5 Miata Sport
2007 ACCESSORIES & BODY, CAB Symptom Troubleshooting (Instrument Cluster) - MX-5 Miata
Microsoft
Thursday, July 09, 2009 3:31:09 PM
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