K71 Transmission Control Module: Scan Tool Information (10L1000 (MGM, MGU))
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
K71 Transmission Control Module - Scan Tool Parameter
| Parameter | System State | Expected Value |
|---|---|---|
| Operating Conditions: Ignition = On | ||
| 9V Reference 1 Circuit Status | - | OK |
| 9V Reference 2 Circuit Status | - | OK |
| Calculated Line Pressure | Ignition On - Engine Off | 550 kPa (80 PSI) |
| Ignition On - Engine Running | 550 kPa (80 PSI) | |
| 48 km/h (30 MPH) | 500 kPa (73 PSI) | |
| 80 km/h (50 MPH) | 524 kPa (76 PSI) | |
| Calculated Throttle Position | 0 km/h (0 MPH) | 0% |
| 48 km/h (30 MPH) | 10% | |
| 80 km/h (50 MPH) | 13% | |
| Control Module Voltage Signal | Ignition On - Engine Off | 12.60 V |
| Ignition On - Engine Running | 14.40 V | |
| Current Gear | P | Park |
| R | Reverse | |
| N | Neutral | |
| D | 1 - 10 | |
| L | 1 - 10 | |
| Driver Shift Control Mode | S3 Transmission Shift Lever = P, R, N, D | Inactive |
| S3 Transmission Shift Lever = L, M, S | Active | |
| Driver Shift Request | No Button Pressed | Inactive |
| Upshift - Pressed | Up | |
| Downshift - Pressed | Down | |
| Engine Coolant Temperature | Ignition On - Engine Off | 41°C (105°F) |
| Ignition On - Engine Running | 52°C (126°F) | |
| 48 km/h (30 MPH) | 87°C (189°F) | |
| 80 km/h (50 MPH) | 94°C (201°F) | |
| Engine Speed | Ignition On - Engine Off | 0 RPM |
| Ignition On - Engine Running | 582 RPM | |
| 48 km/h (30 MPH) | 1173 RPM | |
| 80 km/h (50 MPH) | 1277 RPM | |
| Engine Torque | Ignition On - Engine Off | -41 Nm (-30 lb ft) |
| Ignition On - Engine Running | 15 Nm (11 lb ft) | |
| 48 km/h (30 MPH) | 58 Nm (43 lb ft) | |
| 80 km/h (50 MPH) | 136 Nm (100 lb ft) | |
| Gear Command | P | Park |
| R | Reverse | |
| N | Neutral | |
| D | 1 - 10 | |
| L | 1 - 10 | |
| Gear Ratio | 1 | 4.68:1 |
| 2 | 2.98:1 | |
| 3 | 2.15:1 | |
| 4 | 1.77:1 | |
| 5 | 1.52:1 | |
| 6 | 1.27:1 | |
| 7 | 1.00:1 | |
| 8 | 0.85:1 | |
| 9 | 0.69:1 | |
| 10 | 0.64:1 | |
| R | 4.86:1 | |
| High Side Driver 1 Circuit High Voltage Test Status | - | OK |
| High Side Driver 1 Circuit Low Voltage Test Status | - | OK |
| High Side Driver 1 Circuit Open Test Status | - | Not Run |
| High Side Driver 1 Command | Engine Running | Disabled |
| Engine = Running | Enabled | |
| High Side Driver 2 Circuit High Voltage Test Status | - | OK |
| High Side Driver 2 Circuit Low Voltage Test Status | - | OK |
| High Side Driver 2 Circuit Open Test Status | - | Not Run |
| High Side Driver 2 Command | Engine Running | Disabled |
| Engine = Running | Enabled | |
| Ignition 1 Signal | - | On |
| Ignition Accessory Signal | - | On |
| Ignition Voltage | Ignition On - Engine Off | 12.60 V |
| Ignition On - Engine Running | 14.40 V | |
| Park System Status | P | Park |
| R, N, D, L, S | Out of Park | |
| Power Mode | - | Run |
| Propulsion System Status | Engine Running | Active |
| Engine Off | Inactive | |
| Shift Limiting Active Reason | - | None |
| TCC Pressure Control Solenoid Valve Command | 0 km/h (0 MPH) | 0.00 kPa (0.00 PSI) |
| 48 km/h (30 MPH) | 334 kPa (48 PSI) | |
| 80 km/h (50 MPH) | 317 kPa (46 PSI) | |
| TCC Slip Speed | Ignition On - Engine Off | 0 RPM |
| Ignition On - Engine Running | 30 RPM | |
| 48 km/h (30 MPH) | 1 RPM | |
| 80 km/h (50 MPH) | 47 RPM | |
| Tow/Haul Mode | Inactive | Inactive |
| Active | Active | |
| Transmission Control Solenoid Valve 1 - 9 Calibration Data | - | Valid |
| Transmission Control Solenoid Valve 1 - 9 Control Circuit High Voltage Test Status | - | Not Run or OK |
| Transmission Control Solenoid Valve 1 - 9 Control Circuit Low Voltage Test Status | - | Not Run or OK |
| Transmission Control Solenoid Valve 1 - 9 Control Circuit Open Test Status | - | Not Run or OK |
| Transmission Control Solenoid Valve 1 Current | Ignition On - Engine Off | 0.75 A |
| Ignition On - Engine Running | 0.98 A | |
| 48 km/h (30 MPH) | 0.99 A | |
| 80 km/h (50 MPH) | 0.98 A | |
| Transmission Control Solenoid Valve 1 Current Command | Ignition On - Engine Off | 0.76 A |
| Ignition On - Engine Running | 0.98 A | |
| 48 km/h (30 MPH) | 1.02 A | |
| 80 km/h (50 MPH) | 0.97 A | |
| Transmission Control Solenoid Valve 1 Pressure Command | Ignition On - Engine Off | 0.00 kPa (0.00 PSI) |
| Ignition On - Engine Running | 136 kPa (20 PSI) | |
| 48 km/h (30 MPH) | 0 kPa (0 PSI) | |
| 80 km/h (50 MPH) | 0 kPa (0 PSI) | |
| Transmission Control Solenoid Valve 2 Current | Ignition On - Engine Off | 0.82 A |
| Ignition On - Engine Running | 0.98 A | |
| 48 km/h (30 MPH) | 0.99 A | |
| 80 km/h (50 MPH) | 0.92 A | |
| Transmission Control Solenoid Valve 2 Current Command | Ignition On - Engine Off | 0.83 A |
| Ignition On - Engine Running | 0.98 A | |
| 48 km/h (30 MPH) | 1.02 A | |
| 80 km/h (50 MPH) | 0.92 A | |
| Transmission Control Solenoid Valve 2 Pressure Command | Ignition On - Engine Off | 0.00 kPa (0.00 PSI) |
| Ignition On - Engine Running | 2, 200 kPa (320 PSI) | |
| 48 km/h (30 MPH) | 0.00 kPa (0.00 PSI) | |
| 80 km/h (50 MPH) | 2, 200 kPa (320 PSI) | |
| Transmission Control Solenoid Valve 3 Current | Ignition On - Engine Off | 0.75 A |
| Ignition On - Engine Running | 1.01 A | |
| 48 km/h (30 MPH) | 1.05 A | |
| 80 km/h (50 MPH) | 0.88 A | |
| Transmission Control Solenoid Valve 3 Current Command | Ignition On - Engine Off | 0.76 A |
| Ignition On - Engine Running | 1.02 A | |
| 48 km/h (30 MPH) | 1.06 A | |
| 80 km/h (50 MPH) | 0.89 A | |
| Transmission Control Solenoid Valve 3 Pressure Command | Ignition On - Engine Off | 0 kPa (0 PSI) |
| Ignition On - Engine Running | 0 kPa (0 PSI) | |
| 48 km/h (30 MPH) | 2, 200 kPa (320 PSI) | |
| 80 km/h (50 MPH) | 2, 200 kPa (320 PSI) | |
| Transmission Control Solenoid Valve 4 Current | Ignition On - Engine Off | 1.2 A |
| Ignition On - Engine Running | 0.89 A | |
| 48 km/h (30 MPH) | 0.69 A | |
| 80 km/h (50 MPH) | 0.88 A | |
| Transmission Control Solenoid Valve 4 Current Command | Ignition On - Engine Off | 1.2 A |
| Ignition On - Engine Running | 0.89 A | |
| 48 km/h (30 MPH) | 0.70 A | |
| 80 km/h (50 MPH) | 0.89 A | |
| Transmission Control Solenoid Valve 4 Pressure Command | Ignition On - Engine Off | 0 kPa (0 PSI) |
| Ignition On - Engine Running | 0 kPa (0 PSI) | |
| 48 km/h (30 MPH) | 2, 200 kPa (320 PSI) | |
| 80 km/h (50 MPH) | 173 kPa (25 PSI) | |
| Transmission Control Solenoid Valve 5 Current | Ignition On - Engine Off | 0.04 A |
| Ignition On - Engine Running | 0.04 A | |
| 48 km/h (30 MPH) | 0.46 A | |
| 80 km/h (50 MPH) | 0.58 A | |
| Transmission Control Solenoid Valve 5 Current Command | Ignition On - Engine Off | 0.04 A |
| Ignition On - Engine Running | 0.04 A | |
| 48 km/h (30 MPH) | 0.47 A | |
| 80 km/h (50 MPH) | 0.59 A | |
| Transmission Control Solenoid Valve 5 Pressure Command | Ignition On - Engine Off | 0 kPa (0 PSI) |
| Ignition On - Engine Running | 0 kPa (0 PSI) | |
| 48 km/h (30 MPH) | 2200 kPa (320 PSI) | |
| 80 km/h (50 MPH) | 170 kPa (25 PSI) | |
| Transmission Control Solenoid Valve 6 Current | Ignition On - Engine Off | 0.57 A |
| Ignition On - Engine Running | 0.54 A | |
| 48 km/h (30 MPH) | 0.53 A | |
| 80 km/h (50 MPH) | 1.20 A | |
| Transmission Control Solenoid Valve 6 Current Command | Ignition On - Engine Off | 0.57 A |
| Ignition On - Engine Running | 0.54 A | |
| 48 km/h (30 MPH) | 0.54 A | |
| 80 km/h (50 MPH) | 1.20 A | |
| Transmission Control Solenoid Valve 6 Pressure Command | Ignition On - Engine Off | 0 kPa (0 PSI) |
| Ignition On - Engine Running | 2, 200 kPa (320 PSI) | |
| 48 km/h (30 MPH) | 2, 200 kPa (320 PSI) | |
| 80 km/h (50 MPH) | 2, 200 kPa (320 PSI) | |
| Transmission Control Solenoid Valve 7 Current | Ignition On - Engine Off | 0.01 A |
| Ignition On - Engine Running | 0.78 A | |
| 48 km/h (30 MPH) | 0.54 A | |
| 80 km/h (50 MPH) | 1.20 A | |
| Transmission Control Solenoid Valve 7 Current Command | Ignition On - Engine Off | 0.01 A |
| Ignition On - Engine Running | 0.78 A | |
| 48 km/h (30 MPH) | 0.54 A | |
| 80 km/h (50 MPH) | 0.51 A | |
| Transmission Control Solenoid Valve 8 Current | Ignition On - Engine Off | 0.00 A |
| Ignition On - Engine Running | 0.00 A | |
| 48 km/h (30 MPH) | 0.52 A | |
| 80 km/h (50 MPH) | 0.50 A | |
| Transmission Control Solenoid Valve 8 Current Command | Ignition On - Engine Off | 0.00 A |
| Ignition On - Engine Running | 0.78 A | |
| 48 km/h (30 MPH) | 0.54 A | |
| 80 km/h (50 MPH) | 1.20 A | |
| Transmission Control Solenoid Valve 9 | - | OfforOn |
| Transmission Fluid Temperature | Ignition On - Engine Off | 33°C (91°F) |
| Ignition On - Engine Running | 42°C (108°F) | |
| 48 km/h (30 MPH) | 49°C (120°F) | |
| 80 km/h (50 MPH) | 63°C (145°F) | |
| Transmission Hot Mode | - | No |
| Transmission Input Speed Sensor Direction | Forward | Forward |
| Reverse | Reverse | |
| Transmission Input Speed Sensor Direction Signal | Forward | 0.05 ms |
| Reverse | 0.18 ms | |
| Transmission Intermediate Speed Sensor 1 | 0 km/h (0 MPH) | 0 RPM |
| 48 km/h (30 MPH) | 1170 RPM | |
| 80 km/h (50 MPH) | 2754 RPM | |
| Transmission Intermediate Speed Sensor 1 Direction | Forward | Forward |
| Reverse | Reverse | |
| Transmission Intermediate Speed Sensor 1 Direction Signal | Forward | 0.05 ms |
| Reverse | 0.18 ms | |
| Transmission Intermediate Speed Sensor 2 | 0 km/h (0 MPH) | 0 RPM |
| 48 km/h (30 MPH) | 1166 RPM | |
| 80 km/h (50 MPH) | 2754 RPM | |
| Transmission Intermediate Speed Sensor 2 Direction | Forward | Forward |
| Reverse | Reverse | |
| Transmission Intermediate Speed Sensor 2 Direction Signal | Forward | 0.05 ms |
| Reverse | 0.18 ms | |
| Transmission ISS | Ignition On - Engine Off | 0 RPM |
| Ignition On - Engine Running | 551 RPM | |
| 48 km/h (30 MPH) | 1166 RPM | |
| 80 km/h (50 MPH) | 1184 RPM | |
| Transmission OSS | 0 km/h (0 MPH) | 0 RPM |
| 48 km/h (30 MPH) | 1159 RPM | |
| 80 km/h (50 MPH) | 1720 RPM | |
| Transmission Output Speed Sensor Direction | Forward | Forward |
| Reverse | Reverse | |
| Transmission Output Speed Sensor Direction Signal | Forward | 0.05 ms |
| Reverse | 0.18 ms | |
| Transmission Park Valve Lock Solenoid Actuator | Park | Off |
| Out of Park | On | |
| Transmission Park Valve Position Sensor 1 | Park | 2.00 V |
| Out of Park | 0.80 V | |
| Transmission Park Valve Position Sensor 1 Status | Park | Park |
| Out of Park | Out of Park | |
| Transmission Park Valve Position Sensor 2 | Park | 0.80 V |
| Out of Park | 1.98 V | |
| Transmission Park Valve Position Sensor 2 Status | Park | Park |
| Out of Park | Out of Park | |
| Transmission Range Control Valve 1 Position Switch | Park | 0.80 V |
| Out of Park | 1.98 V | |
| Transmission Range Control Valve 1 Position Switch Status | Park | Complete |
| Out of Park | Failed | |
| Transmission Range Sensor 1 | P | 13% |
| R | 47% | |
| N | 61% | |
| D | 75% | |
| L | 86% | |
| Transmission Range Sensor 2 | P | 87% |
| R | 53% | |
| N | 39% | |
| D | 25% | |
| L | 14% | |
| Vehicle Speed | - | Varies |
K71 Transmission Control Module - Scan Tool Control Function
| Control Function | Description |
|---|---|
| High Side Driver 1 - 2 | Overrides the state of the High Side Driver Output |
| Shift Transmission Gear | Overrides the commanded gear output |
| Transmission Control Solenoid Valve 1 - 8 | Overrides the state of the Transmission Control Solenoid Valve - On or Off |
| Transmission Control Solenoid Valve 1 - 8 Current | Overrides the current of the Transmission Control Solenoid Valve - 0 - 1.2 A |
| Torque Converter Clutch - Dynamic Test | Overrides the state of the Transmission Control Solenoid Valve that operates the Torque Converter Clutch, to be used during a road test. |
| Torque Converter Clutch - Static Test | Overrides the state of the Transmission Control Solenoid Valve that operates the Torque Converter Clutch, to be used when the engine is not running. |