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...
P1682 —
Communication
problem - EMS
message missing
— 5 N/A N/A Y Y N N/A
Possible cause:
Damaged circuit wires, damaged connector, damaged MPEM output pins. ECM not connected.
Service action:
Check system circuits 2-10 and 2-11.
Check for 12 volts between system circuit A-11 and ground.
Check 5A fuses.
Check connection.
P1683 — — COM RAM Fault 15 Flash N/A — — — —
Possible cause:
Damaged ECM.
Service action:
No service action available for fault P1683, symptom 88.
P1690 —
VTS control up
circuit open
circuitorshorted
to ground
— 15 Off N/A Y Y N N/A
Possible cause:
Damaged VTS, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Check for 12 volts between system circuits 2-7 and 2-1 when VTS UP is activated.
P1691 —
VTS control up
circuit shorted
to battery
— 15 Off N/A Y Y N N/A
Possible cause:
Damaged VTS, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Check for 12 volts between system circuits 2-7 and 2-1 when VTS UP is activated.
P1692 —
VTS control down
circuit open
circuitorshorted
to ground
— 15 Off N/A y y N N/A
Possible cause:
Damaged VTS, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Check for 12 volts between system circuits 2-6 and 2-1 when VTS DOWN
is activated.
P1693 —
VTS control down
circuit shorted
to battery
— 15 Off N/A y y N N/A
Possible cause:
Damaged VTS, damaged circuit wires, damaged connector or damaged MPEM output pins.
Service action:
Check for 12 volts between system circuits 2-6 and 2-1 when VTS DOWN is activated.
464 smr2004-Complete Line Up
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