Mystique L4-122 2.0L DOHC VIN 3 SFI (1995)
Code 631 - 640: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO)
KOER refers to Key On Engine Running (KOER)
DTC refers to Diagnostic Trouble Code (DTC)
DTCs should be diagnosed in the order they are received.
DTC 625
Electronic Pressure Control driver open in Powertrain Control Module.
KOEO Hard Code ................................................................................................................................................................................... Go to TC10
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TC - Transmission Solenoids/TC10 - Check
VPWR to Solenoid
KOEO Memory Code ............................................................................................................................................................................. Go to TG90
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TG - Electronic Transmission - Continuous
Memory Service Codes/TG90 - Perform Drive Cycle Test
DTC 626
Coast Clutch Solenoid (CCS) circuit failure during KOEO self-test.
KOEO Hard Code ..................................................................................................................................................................................... Go to TC1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TC - Transmission Solenoids/TC1 - Enter
Output State Diagnostic Test Mode
DTC 627
Torque Converter Clutch solenoid circuit failure.
KOEO Hard Code ..................................................................................................................................................................................... Go to TC1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TC - Transmission Solenoids/TC1 - Enter
Output State Diagnostic Test Mode
DTC 628
Excessive converter clutch slippage.
KOEO Memory Code ............................................................................................................................................................................. Go to TG90
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TG - Electronic Transmission - Continuous
Memory Service Codes/TG90 - Perform Drive Cycle Test
DTC 629
Torque Converter Clutch solenoid circuit failure.
KOEO Hard Code ..................................................................................................................................................................................... Go to TC1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TC - Transmission Solenoids/TC1 - Enter
Output State Diagnostic Test Mode
DTC 631
Transmission Control Indicator Lamp circuit failure during KOEO self-test.
KOEO Hard Code ..................................................................................................................................................................................... Go to TB3
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TB - 4X4 Low/Transmission Control
TCIL-TCS-TCSM/TB3 - Diagnostic Trouble Codes 97, 623 and 631
DTC 632
Transmission Control Switch circuit did not change states during KOER self-test.
KOER Hard Code ..................................................................................................................................................................................... Go to TB2
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TB - 4X4 Low/Transmission Control
TCIL-TCS-TCSM/TB2 - Diagnostic Trouble Codes 65, 632 and 653
DTC 633
4x4L switch closed during KOEO self-test.
KOEO Hard Code ..................................................................................................................................................................................... Go to TB1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/TB - 4X4 Low/Transmission Control
