CIRCUIT DESCRIPTION:The TCM receives input on throttle position from either a TPS or a signal transmitted by the engine electronic controls. Vehicles not equipped with electronically-controlled engines have a TPS attached to the engine fuel control linkage. The TPS continuously sends the exact throttle position to the TCM. The TPS is a sliding resistor sensor (potentiometer) actuated by a mechanical linkage. The TCM delivers a constant voltage to one terminal of the TPS resistive strip. The other TPS terminal connects to ground. The resistor contacts of the TPS are connected to provide a regulated voltage signal input to the TCM....

CIRCUIT DESCRIPTION:The TCM receives input on throttle position from either a TPS or a signal transmitted by the engine electronic controls. Vehicles not equipped with electronically-controlled engines have a TPS attached to the engine fuel control linkage. The TPS continuously sends the exact throttle position to the TCM. The TPS is a sliding resistor sensor (potentiometer) actuated by a mechanical linkage. The TCM delivers a constant voltage to one terminal of the TPS resistive strip. The other TPS terminal connects to ground. The resistor contacts of the TPS are connected to provide a regulated voltage signal input to the TCM....

CIRCUIT DESCRIPTION:DTC P0218 indicates a sump temperature threshold has been exceeded, this can allow converter out temperatures to reach much higher than acceptable. Torque converter stator One Way Clutch (OWC) function should be tested after achieving high converter out temperatures. If the TCM detects a high Transmission Fluid Temperature (TFT) for an extended period of time, then DTC P0218 sets. ACTION TAKEN WHEN THE DTC SETS:1. The CHECK TRANS light is not illuminated (non-OBD II strategy).2. The TCM forces Variable Modulated Main off.3. The TCM freezes shift adapts (DNA).4. The TCM records the operating conditions when the conditions for setting...

CIRCUIT DESCRIPTION:The TCM requires a switched ignition voltage input. This switched ignition voltage signal originates from the ignition switch or an ignition relay to supply voltage to wire 163 in the 80-way connector at the TCM. DTC P0561 when the TCM detects large variations in system voltage and variations near the low system voltage threshold. This DTC is only enabled with GM L96 applications. ACTION TAKEN WHEN THE DTC SETS:When DTC P0561 is active, the following conditions occur:1. DTC is stored in the TCM history.2. No response.3. The TCM forces the Variable Modulated Main off.4. The TCM freezes shift adapts...

CIRCUIT DESCRIPTION:The TCM requires a switched ignition voltage input to operate. This switched ignition voltage signal originates from the ignition switch or an ignition relay to supply voltage to wire 163 in the 80-way connector at the TCM. DTC P0562 is set when the TCM detects low ignition voltage by comparing to a calibration value. This DTC is only enabled with GM L96 applications. ACTION TAKEN WHEN THE DTC SETS:1. The TCM does not illuminate the CHECK TRANS light.2. No response.3. The TCM forces Variable Modulated Main off.4. The TCM freezes shift adapts (DNA).5. The TCM inhibits TCC engagement.6. DTC...