MIL Diagnostic Mode

WARNING: This page is about a different car, the 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

Start engine (if possible). On A/T models, move transmission shift lever through all positions, ending in Park. On all models, turn A/C switch on and then off (if equipped).
Turn engine off. Without starting engine again, turn ignition on, off, on, off and on. MIL will come on for 2 seconds as a bulb check, followed by fault codes. Record 2-digit fault codes displayed by MIL.
For example, Code 23 is displayed as flash, flash, pause, then flash, flash, flash. Fault codes are displayed in numerical order and are separated by 4-second pause.
Once MIL begins flashing fault codes, cycle cannot be stopped. To enter diagnostic mode again, repeat step 1). Code 55 indicates end of fault code display. For more information on self-diagnostics, see appropriate G - TESTS W/ CODES article in ENGINE PERFORMANCE section:
- G - TESTS W/CODES - 3.9L
- G - TESTS W/CODES - 5.2L GASOLINE

After retrieving fault codes, refer to CHARGING SYSTEM FAULT CODES table to identify problem circuit (same description is displayed on the DRB). Test the appropriate circuit, and repair or replace components as necessary. Refer to appropriate test procedure under ON-VEHICLE TESTING .

CHARGING SYSTEM TROUBLE CODES

Code

Description

MIL On

Battery Feed To PCM

41 ⁽¹⁾

Generator Field Control

Yes

44 ⁽¹⁾

Battery Temp. Sensor

Yes

46 ⁽¹⁾

High Battery Voltage

Yes

47 ⁽¹⁾

Low Battery Voltage

Yes

End Of Diagnostic Mode

⁽¹⁾	This code will cause limp-in mode.

NOTE: Only charging system-related codes are listed. For engine-related codes, see appropriate G - TESTS W/ CODES article in ENGINE PERFORMANCE section:

G - TESTS W/CODES - 3.9L
G - TESTS W/CODES - 5.2L GASOLINE