Computer Codes:

Diagnosis: EEC-IV .

(Transmission Related)

11 - Computer Self Test passed.
15 - PCM self test of Read Only Memory has failed.
15 - PCM self test of Keep Alive Memory has failed.
23 - TPS sensor out of self-test range
26 - TOT sensor out of self-test range (E4OD)
29 - No signal from VSS
45 - Coil 1 2 or 3 failure.
47 - 4WD switch closed (E4OD)
49 - 1-2 shift error (E4OD)
53 - TPS circuit above maximum voltage
56 - TOT reads -40°F or circuit open (E4OD)
59 - 2-3 shift error (E4OD)
63 - TPS circuit below minimum voltage
65 - Overdrive cancel switch open and no change seen by computer (E4OD)
66 - TOT grounded or reads Max Temperature (E4OD)
67 - Neutral Switch open or A/C is on (turn off A/C during Tests.
67 - Clutch switch circuit failure
67 - MLP sensor out of range or A/C on (E4OD)
69 - 3-4 shift error
73 - Insufficient TPS change during dynamic test
88 - Loss of dual plug input control
91 - Shift solenoid 1 circuit failure (E4OD)
92 - Shift solenoid 2 circuit failure (E4OD)
93 - Coast clutch solenoid circuit failure (E4OD)
94 - Converter clutch solenoid circuit failure (E4OD)
97 - Overdrive cancel indicator light - circuit failure (E4OD)
98 - Electronic pressure control driver open in PCM (E4OD)
98 - Hard fault present
99 - Electronic pressure control circuit failure (E4OD)
111 - System pass
121 - Closed throttle voltage higher or tower than expected
167 - TPS change during dynamic response test is beyond specifications
452 - Insufficient input from vehicle speed sensor
511 - EEC processor ROM test failed
512 - EEC processor Keep Alive Memory test failed
513 - Failure in EEC processor internal voltage
617 - 1-2 shift error (E4OD)
618 - 2-3 shift error (E4OD)
619 - 3-4 shift error (E4OD)
626 - Coast clutch solenoid circuit failure (E4OD)
627 - Converter clutch solenoid circuit failure (E4OD)
628 - Converter clutch error (E4OD)
629 - Converter clutch control circuit failure
631 - Overdrive cancel indicator light circuit failure
632 - Overdrive cancel switch not changing states (E4OD)
633 - 4WD switch is closed
634 - MLP sensor voltage out of self-test range A/C on
636 - TOT sensor voltage out of self-test range
637 - TOT sensor circuit above maximum voltage
638 - TOT sensor circuit below minimum voltage
654 - MLP sensor not in park position
998 - Hard fault present
Abbreviations Defined -
EEC = Electronic Engine Control System
KOEO = Key On Engine Off
KOER = Key On Engine Running
MLP = Manual Lever Position Sensor
PCM = Powertrain Control Module
TPS = Throttle Position Sensor
VSS = Vehicle Speed Sensor