Escort ZX2 L4-2.0L DOHC VIN 3 (2000)
Engine Oil: All Technical Service Bulletins
VCT Solenoid - MIL ON/Trouble Codes Stored
Article No.
00-3-7
02/07/00
^
MALFUNCTION INDICATOR LAMP (MIL) - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P1380, P1381, OR P1383 IN
MEMORY - NO DRIVEABILITY CONCERN S - VEHICLES WITH 2.0L ENGINE
^
ENGINE - 2.0L - ENGINE OIL CONTAMINATION WITH DIAGNOSTIC TROUBLE CODES (DTCS) P1380, P1381, OR P1383 IN MEMORY
- NO DRIVEABILITY CONCERNS
FORD:
1998-2000 CONTOUR, ESCORT ZX2
MERCURY:
1998-2000 MYSTIQUE
1999-2000 COUGAR
ISSUE
The Malfunction Indicator Lamp (MIL) may illuminate with Diagnostic Trouble Codes (DTCs) P1380,.P1381 or P1383 stored in continuous memory on
some vehicles. Driveability concerns may or may not be present. This may be caused by engine oil contamination.
ACTION
Refer to the following Service Procedure for diagnostic and repair procedures.
SERVICE PROCEDURE
The Variable Cam Timing (VCT) sprocket retards the exhaust camshaft up to 30 degrees producing exhaust valve overlap. This controlled overlap
allows exhaust gases to enter the combustion chamber, effectively providing Exhaust Gas Recirculation (EGR) flow to the engine without the use of an
EGR valve. The VCT holds the exhaust camshaft fully advanced by internal spring pressure in its normal, uncontrolled state. For example, if the VCT
solenoid is unplugged. When retard is commanded by the Powertrain Control Module (PCM), engine oil pressure is directed through the VCT solenoid
to overcome internal return spring force in the VCT sprocket.
Parameter Identification Displays (PIDS) Relevant To VCT:
CAMDCR (0 to 99%) is the on-time of the VCT solenoid as requested by the PCM.
CAMERR (0 to 30 Degrees) is how many degrees the exhaust cam is "out" from the requested position. Values "+" mean the cam is not retarded enough
and values "-" indicate the cam is over retarded.
RCAM (-15 to +45 Degrees) represents actual position of the cam relative to the crankshaft.
Normal PID Values (Approximate):
Warm idle (exhaust cam fully advanced/no EGR effect): CAMDCR = 0%, CAMERR 0 degrees, RCAM = -15 degrees.
Warm cruise: CAMDCR = 50%, CAMERR = 0 degrees, RCAM = 40 degrees.
DTC(s):
P1380 - VCT Solenoid Malfunction: Indicates a VCT circuit failure between the PCM and the VCT solenoid, or possible VCT solenoid failure. Consult
the appropriate Electrical and Vacuum Troubleshooting Manual (EVTM) for circuit location and description.
P1381 - VCT Over-Advanced: Indicates the exhaust camshaft would not retard to the position requested by the PCM.
P1383 - VCT Over-Retarded: Indicates the exhaust camshaft would not advance (return) to the position requested by the PCM.
Diagnosing DTCs P1380, P1381, Or P1383:
P1380 and P1381 stored together: Possible open VCT solenoid or circuit between the PCM and VCT. These conditions would not allow the cam to
retard as requested by the PCM.
P1381 or P1383: Must NOT be set together and ONLY in Continuous Memory for the following to be accurate: Possible VCT sprocket is sticking
