Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (DIAGNOSTIC PROCEDURES)
RESPONSIBLE MODULE
FAULT
CODE
INFORMATION
CENTER
MPEM ECM
BEEPER
CODE
WARNING
LIGHT
MESSAGE
DISPLAYED
(info ctr)
FAULT
DETECTED
WHILE ENGINE
NOT RUNNING
FAULT
DETECTED
WHILE ENGINE
RUNNING
LIMP
HOME
MODE
NORMAL
OPERATION
RESUME
WHEN...
P1675 —
Spare output 1
shorted to ground
or open circuit
— 15 N/A N/A Y Y N N/A
Possible cause:
Damaged component, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Connect component or disable spare output 1 in setting page.
P1676 —
Spare output 1
shortedto12V
— 15 N/A N/A Y Y N N/A
Possible cause:
Damaged component, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Connect component or disable spare output 1 in setting page.
P1678 —
Spare output 2
shorted to ground
or open circuit
— 15 N/A N/A Y Y N N/A
Possible cause:
Damaged component, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Connect component or disable spare output 2 in setting page.
P1679 —
Spare output 2
shortedto12V
— 15 N/A N/A Y Y N N/A
Possible cause:
Damaged component, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Connect component or disable spare output 2 in setting page.
P1680 —
Communication
problem detected
by MPEM
— 5 N/A N/A Y Y N N/A
Possible cause:
Damaged circuit wires, damaged connector, damaged MPEM output pins.
Diagnostic connector cap not connected.
Service action:
Connect diagnostic connector cap.
P1681 —
Communication
problem –
instrument
cluster message
missing
— 5 N/A N/A Y Y N N/A
Possible cause:
Damaged circuit wires, damaged connector, damaged MPEM output pins.
Instrument cluster not connected.
Service action:
Check system circuits 1-10 and 1-11.
Check for 12 volts between pins 7 and 8 on the instrument cluster harness connector.
Check 1A fuse.
Connect instrument cluster.
smr2004-Complete Line Up 463
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