EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-60 90-860074--1 FEBRUARY 2002
MIL [Malfunction Indicator Lamp (Diagnostic Lamp)]
MODELS WITH LATE (21 PIN) CONNECTOR
Scan Code:
P1650
Blink Code: 1242
Malfunction Indicator Lamp: OFF
ECM
75476
75305
26
d
e
2
2
3
1
BLK
RED
BLU/TAN
BLK
RED
RED
RED
RED
BRN
BLK
ORN
ORN
YEL/RED
BLU/BLK
PPL/YEL
PPL
YEL
TAN
GRN
PPL/YEL
GRY
BLK
M
PPL
PPL
a
b
c
f
BRN/WHT
YEL
a-Electrical Box
b-Pin M of Instrumentation Harness 21 Pin Connector
c-Pin 2 of ECM 12 Pin Harness Connector
d-MIL
e-Instrument Panel
f-ECM Supplied Ground Circuit
CIRCUIT DESCRIPTION:
The MIL (Malfunction Indicator Lamp) is controlled by the ECM. The lamp is supplied 12
volts with the key in the ON/RUN position. A ground (–) path is closed when the ECM
determines that a malfunction (trouble code) has occurred. The lamp is illuminated.
CKT PIN
NAME
26 ECM controlled Ground (–) for dash panel MIL
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