Allison

Main code 69 indicates the ECU has malfunctioned. ECU, open driver, C solenoid circuit

To assist in tracking ECU reliability, the subcode has been included to indicate the cause of the ECU malfunction. Most codes, except Code 69 34, can be cleared; but they will probably recur. Replacing the ECU corrects the problem.

Main code 69 indicates the ECU has malfunctioned. ECU, open driver, C solenoid circuit

To assist in tracking ECU reliability, the subcode has been included to indicate the cause of the ECU malfunction. Most codes, except Code 69 34, can be cleared; but they will probably recur. Replacing the ECU corrects the problem.

DIAGNOSTIC RESPONSE:
Inhibits retarder operation if not using J1939 datalink

CIRCUIT DESCRIPTION:
The TCM may be calibrated to receive a Retarder Modulation Request (RMR) signal from a retarder request sensor, sometimes called a resistance module or RMR device.

NOTE: A TCM calibration with the retarder feature can be specified to:
1. Only receive an analog RMR on W156.
2. Only receive the RMR message on SAE J1939.
3. Receive both an analog RMR signal and a SAE J1939 RMR message.

The TCM is connected to the retarder request sensor by:
1. A 5V reference voltage (W112),
2. Retarder request signal (W156), and
3. Analog ground (W158).

The TCM provides a 5V reference voltage to the retarder request sensor. A voltage driver network in the sensor produces a retarder request signal in response to inputs from the retarder control device(s). The TCM interprets this signal as a percent retarder requested.

CONDITIONS FOR RUNNING THE DTC:
1. Retarder and analog RMR source must be enabled in calibration.
2. Retarder must be autodetected or CMC Override Retarder Autodetect must be programmed to ‘Present’.
3. After TCM initializes normally and engine speed is above 200 rpm, this DTC test will run at 0.25 second intervals.
4. DTC not active.

CONDITIONS FOR SETTING THE DTC:
DTC C1312 sets if the TCM is calibrated to receive the retarder request signal, and the signal voltage is less than 0.3V for five seconds.

ACTION TAKEN WHEN THE DTC SETS:
When DTC C1312 is active, the following conditions occur:
1. The TCM does not illuminate the CHECK TRANS light.
2. DTC is stored in TCM history.
3. TCM will inhibit retarder operation if not using datalink for RMR message.

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without failure.

DIAGNOSTIC AIDS:
DTC C1312 indicates the TCM has detected a voltage signal from the retarder request sensor in the low error zone and may be caused by the following:
1. Open or short to ground in W112 or W156 circuits.

NOTE: Shorts or opens in W112 typically will log other sensor failed low DTCs that are using W112 (5V), such as the Oil Level Sensor (OLS), Electronic Brake System (EBS) pressure sensor, or analog Throttle Position Sensor (TPS). Shorts or opens in W156 (RMR analog signal) only causes DTC C1312.

2. Non-retarder application has autodetected retarder or had the CMC Override Retarder Autodetect set to ‘Present’.
3. Missing RMR module.
4. Defective sensor sharing 5V supply.
5. 5V wire open or grounded in transmission internal harness.
6. Broken or defective connector assemblies allowing pushed back pins to short together.
7. Unlocked connectors, missing seal plugs allowing moisture in connectors.
8. TCM issue.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.

DIAGNOSTIC RESPONSE:
May inhibit retarder operation if not using J1939 datalink

CIRCUIT DESCRIPTION:
The TCM may be calibrated to receive a Retarder Modulation Request (RMR) signal from a retarder request sensor, sometimes called a resistance module or RMR device.

NOTE: A TCM calibration with the retarder feature can be specified to:
1. Only receive an analog RMR on W156.
2. Only receive the RMR message on SAE J1939.
3. Receive both an analog RMR signal and a SAE J1939 RMR message.

The TCM is connected to the retarder request sensor by:
1. A 5V reference voltage (W112),
2. Retarder request signal (W156), and
3. Analog ground (W158).

The TCM provides a 5V reference voltage to the retarder request sensor. A voltage divider network in the sensor produces a retarder request signal in response to inputs from the retarder control device(s). The TCM interprets this signal as a percent retarder requested.

CONDITIONS FOR RUNNING THE DTC:
1. Retarder and analog RMR source must be enabled in calibration.
2. Retarder must be autodetected or CMC Override Retarder Autodetect must be programmed to ‘Present’.
3. After TCM initializes normally and engine speed is above 200 rpm, this DTC test will run at 0.25 second intervals.
4. DTC not active.

CONDITIONS FOR SETTING THE DTC:
DTC C1313 sets if the TCM is calibrated to receive the retarder request signal, and the signal voltage is more than 4.7V for five seconds.

ACTION TAKEN WHEN THE DTC SETS:
When DTC C1313 is active, the following conditions occur:
1. The TCM does not illuminate the CHECK TRANS light.
2. DTC is stored in TCM history.
3. TCM will inhibit retarder operation if not using datalink for RMR message.

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without failure.

DIAGNOSTIC AIDS:
DTC C1313 indicates the TCM has detected a voltage signal from the retarder request sensor in the high error zone and may be caused by the following:
1. A short to battery in W112 or W156 circuits.

NOTE: Shorts to battery in W112 or opens in W158 typically will log other sensor failed high DTCs that are using W112 (5V) and W158 (GND), such as the Oil Level Sensor (OLS), Electronic Brake System (EBS) pressure sensor, or analog Throttle Position Sensor (TPS). Shorts to battery in W156 (RMR analog signal) only causes DTC C1313.

2. Open in W158.
3. Non-retarder application has autodetected retarder with a short to battery condition or had the CMC Override Retarder Autodetect set to ‘Present’ with a short to battery condition.
4. Short to battery for RMR module or circuit.
5. Defective sensor sharing 5V supply shorted to battery.
6. 5V wire shorted to battery in transmission internal harness.
7. Broken or defective connector assemblies allowing pushed back pins to short together.
8. Unlocked connectors, missing seal plugs allowing moisture in connectors.
9. TCM issue.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.

DIAGNOSTIC RESPONSE:
Use default throttle values. Freezes shift adapts

CIRCUIT DESCRIPTION:
The TCM may be calibrated to receive an analog TPS pedal position signal from a TPS. Throttle position information comes from a resistive sensor. The resistive throttle sensor is attached to throttle linkage. This device produces a voltage proportional to throttle position.

NOTE: Refer to Throttle Position Sensor (TPS) Adjustment for the TPS adjustment procedure and signal voltage specifications.

NOTE: The transmission TPS is not the same accelerator pedal sensor that the driver actuates to accelerate the vehicle. The transmission TPS is not used to fuel, accelerate, or decelerate the engine or vehicle. The transmission TPS is only wired to the transmission TCM and is only used for shift scheduling purposes based on the TPS signal amount (shown as TPS voltage in Data Monitor).

NOTE: A throttle source can be specified by:
1. Autodetect of the throttle source (prior to MY 09 new release calibrations). Calibrations that have rolled forward from a previous software release will continue to have the autodetect source available in later CIN versions.
2. Use of CMC Override Throttle Source with the diagnostic tool to set throttle source (Analog, SAE J1939, SAE J1587, PWM, or Autodetect). Choose “Autodetect”‘ from the CMC list only if the calibration is prior to MY 09 or the autodetect feature has rolled into a later CIN version.
3. Communication link type picked during calibration request process for MY 09 and later calibrations

NOTE: New MY 09 and later calibrations that did not maintain autodetect, i.e. did not roll forward from earlier software, should not be re-programmed by the CMC Override Throttle Source. This disables some datalink features for the calibration’s specified communication link type. If a different throttle source is needed, calibrate with a new CIN that enables the desired throttle source.

The TCM is connected to the TPS by:
1. A 5V reference voltage (W112),
2. TPS signal (W144), and
3. Analog ground (W158).

The TCM provides a 5V reference voltage to the TPS. A voltage divider network in the sensor produces a TPS signal in response to the pedal position. The TCM interprets this signal as TPS voltage. At each incremental distance of 0.78 mm (0.007 inch) along the resistive strip, the sensor produces a proportional voltage to the TCM on W144. The varying voltage at W144 is interpreted as pedal position and the driver’s demand for engine torque and vehicle speed. The TCM uses this TPS information for transmission shift scheduling and modulation.

CONDITIONS FOR RUNNING THE DTC:
1. An analog TPS must be the throttle source.
2. After TCM initializes normally and engine speed is above 200 rpm for more than 5 seconds, this DTC test will run at 0.10 second intervals.
3. DTC P0122 not active.

CONDITIONS FOR SETTING THE DTC:
DTC P0122 sets if the TCM has autodetected, forced, or been calibrated to receive an analog TPS signal, and the signal voltage is less than 0.25V for 5 seconds.

ACTION TAKEN WHEN THE DTC SETS:
When DTC P0122 is active, the following conditions occur:
1. The TCM does not illuminate the CHECK TRANS light, unless January 2010 software or later.
2. DTC is stored in TCM history.
3. Default value used for % throttle based on engine torque and engine speed.

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without failure.

DIAGNOSTIC AIDS:
DTC P0122 indicates the TCM has detected a voltage signal from the TPS in the low error zone and may be caused by the following:
1. Open or short to ground in W112 or W144 circuits.

NOTE: Shorts or opens in W112 typically will log other sensor failed low DTCs that are using W112 (5V), such as the Oil Level Sensor (OLS), or Retarder Modulation Request (RMR) Sensor. Shorts or opens in W144 (TPS signal) only causes DTC P0122.

2. Analog TPS source set in calibration or has been autodetected in non-analog TPS applications.
3. Analog TPS source set by CMC Override Throttle Source using the diagnostic tool in non-analog TPS application.
4. Missing, defective, or unplugged TPS.
5. Defective sensor sharing 5V supply.
6. 5V wire open or grounded in transmission internal harness.
7. Broken or defective connector assemblies allowing pushed back pins to short together.
8. Unlocked connectors, missing seal plugs allowing moisture in connectors.
9. TCM issue.
10. TPS not adjusted. Refer to Throttle Position Sensor (TPS) Adjustment.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.

DIAGNOSTIC RESPONSE:
Use default throttle values. Freezes shift adapts.

CIRCUIT DESCRIPTION:
The TCM may be calibrated to receive an analog Throttle Position Sensor (TPS) pedal position signal from a TPS. Throttle position information comes from a resistive sensor. The resistive throttle sensor is attached to throttle linkage. This device produces a voltage proportional to throttle position.

NOTE: Refer to Throttle Position Sensor (TPS) Adjustment for the TPS adjustment procedure and signal voltage specifications.

NOTE: The transmission TPS is not the same accelerator pedal sensor that the driver actuates to the accelerate the vehicle. The transmission TPS is not used to fuel, accelerate, or decelerate the engine or vehicle. The transmission TPS is only wired to the transmission TCM and is only used for shift scheduling purposes based on the TPS signal amount (shown as TPS voltage in data monitor).

NOTE: A throttle source can be specified by:
1. Autodetect of the throttle source (prior to MY 09 new release calibrations). Calibrations that have rolled forward from a previous software release will continue to have the autodetect source available in later CIN versions.
2. Use of CMC Override Throttle Sensor with the diagnostic tool to set throttle source (Analog, SAE J1939, SAE J1587, PWM, or Autodetect). Choose “Autodetect” from the CMC list only if the calibration is prior to MY 09 or the autodetect feature has rolled into a later CIN version.
3. Communication link type picked during calibration request process for MY 09 and later calibrations.

NOTE: New MY 09 and later calibrations that did not maintain autodetect, i.e. did not roll forward from earlier software, should not be re-programmed by the CMC Override Throttle Source. This disables some datalink features for the calibration’s specified communication link type. If a different throttle source is needed, calibrate with a new CIN that enables the desired throttle source.

The TCM is connected to the TPS by:
1. A 5V reference voltage (W112),
2. TPS Signal (W144), and
3. Analog ground (W1458).

The TCM provides a 5V reference voltage to the TPS. A voltage divider network in the sensor produces a TPS signal in response to the pedal position. The TCM interprets this signal as TPS voltage. At each incremental distance of 0.78 mm (0.007 inch) along the resistive strip, the sensor produces a proportional voltage to the TCM on W144. The varying voltage at W144 is interpreted as pedal position and the driver’s demand for engine torque and vehicle speed. The TCM uses this TPS information for transmission shift scheduling and modulation.

CONDITIONS FOR RUNNING THE DTC:
1. An analog TPS must be the throttle source.
2. After TCM initializes normally and engine speed is above 200 rpm for more than 5 seconds, this DTC test will run at 0.10 second intervals.
3. DTC P0123 not active.

CONDITIONS FOR SETTING THE DTC:
DTC P0123 sets if the TCM has autodetected, forced, or been calibrated to receive an analog TPS signal, and the signal voltage is more than 4.75V for 5 seconds.

ACTION TAKEN WHEN THE DTC SETS:
When DTC P0123 is active, the following conditions occur:
1. The TCM does not illuminate the CHECK TRANS light, unless January 2010 software or later.
2. DTC is stored in TCM history.
3. Default value used for % throttle based on engine torque and engine speed.

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without failure.

DIAGNOSTIC AIDS:
DTC P0123 indicates the TCM has detected a voltage signal from the TPS in the high error zone and may be caused by the following:
1. A short to battery in W112 or W144 circuits.

NOTE: Shorts to battery in W112 typically will log other sensor failed low DTCs that are using W112 (5V), such as the Oil Level Sensor (OLS), or Retarder Modulation Request (RMR) Sensor. Shorts to battery in W144 (TPS signal) only causes DTC P0123.

2. Analog TPS source set in calibration or has been autodetected in non-analog TPS applications.
3. Analog TPS source set by CMC Override Throttle Source using the diagnostic tool in non-analog TPS application.
4. Defective sensor sharing 5V supply shorted to battery.
5. 5V wire shorted to battery in transmission internal harness.
6. Broken or defective connector assemblies allowing pushed back pins to short together.
7. Unlocked connectors, missing seal plugs allowing moisture in connectors.
8. TCM issue.
9. TPS not adjusted. Refer to Throttle Position Sensor (TPS) Adjustment.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.

DIAGNOSTIC RESPONSE:
Use default sump temperature

CIRCUIT DESCRIPTION:
The Transmission Fluid Temperature (TFT) sensor is incorporated into the internal wiring harness and measures the sump temperature. The TFT sensor is a thermistor (thermally sensitive resistor) that changes its resistance value based on the temperature of the transmission fluid. The Transmission Control Module (TCM) supplies a 5V reference voltage signal to a reference resistor inside the TCM that is in series with the TFT sensor. The voltage drop across the TFT sensor is constantly changing as the TFT sensor resistance varies due to the change in transmission fluid. When the transmission is cold the sensor resistance is high and the TCM detects high signal voltage on W154. As the transmission fluid temperature warms, the resistance of the TFT sensor decreases and the signal voltage on W154 also decreases. The TCM uses this voltage on W154 to calculate transmission fluid temperature and optimize shift quality.

CONDITIONS FOR RUNNING THE DTC:
1. After TCM initializes normally and engine speed is above 200 rpm for more than 5 seconds, this DTC test will run at 0.25 second intervals.
2. If engine runtime is less than 10 minutes, then engine coolant temperature must be above 20°C (68°F) for more than 20 seconds.
3. Transmission fluid temperature is less than 150°C (302°F).
4. This test will not run in current ignition cycle with active DTCs P0218, P0712 or P0713.

CONDITIONS FOR SETTING THE DTC:
1. TFT sensor signal for fluid temperature higher than 121°C (250°F) for more than 15 minutes.
2. TFT Sensor signal for fluid temperature higher than 128°C (262°F) value for more than 60 seconds.
3. TFT sensor signal for fluid temperature higher than 132°C (270°F) for more than 3 seconds.

ACTION TAKEN WHEN THE DTC SETS:
When DTC P0218 is active, the following conditions occur:
1. The TCM does not illuminate the CHECK TRANS light.
2. DTC is stored in TCM history.
3. The TCM freezes shift adapts (DNA).
4. TCM defaults to hot mode shift schedule. The hot mode shift schedule limits transmission to no higher than fourth range and TCC (lookup) is inhibited to increase engine speed and improve cooler flow. In addition, if the transmission is above 4th range when an over-temperature occurs, the preselect shift schedule is used for all downshifts until 4th is reach.

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles within the DTC recurring.

The DTC goes inactive and the TCM cancels the DTC active actions when the TFT sensor signals that the fluid temperature is below 121°C (250°F) for 10 seconds or more.

DIAGNOSTIC AIDS:
NOTE: DTC may occur in vehicles with history of DTC P0712. Follow the diagnostic steps in DTC P0712 before proceeding to the diagnostic steps for this DTC. Repairing the condition that sets DTC P0712 will likely eliminate DTC P0218.

Using the diagnostic tool, monitor the transmission fluid temperature to verify that it rises in cycles and then stabilizes.

Monitor and record snapshot fluid temperature.

Follow transmission overheat troubleshooting in General Troubleshooting Of Performance Complaints for problem: Overheating Indicated by DTCs P0218, P2740 or Fluid Condition, and if equipped with a retarder follow problem Retarder Feels Weak.

TFT sensor resistance is available on the diagnostic tool data monitor grid. Prior to ‘Connect’ for the diagnostic tool, check the ‘Troubleshooting Specific Problem’ box under the “Connection Options” and then check the ‘Sensor, Voltage, Ohms, and Counts Data’ box. Check if TFT sensor resistance is increasing, decreasing, decreasing, or stationary with fluctuations in fluid temperature. Normal circuit operation is indicated if sensor resistance decreases as fluid temperature increases, and sensor resistance increases as fluid temperature decreases.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.

DIAGNOSTIC RESPONSE:
Inhibits TCC Operation, DNA

CIRCUIT DESCRIPTION:
The Transmission Control Module (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.

The ignition sense power signal to terminal 63 turns the TCM ON from its power-down state. The TCM reads the calibration data in memory, reads the PROM, checks all sensors for readiness, then commands the transmission and shift selector to N (Neutral). The throttle position calibration is adjusted as necessary from the stored data, and the neutral start relay activates to permit starting of the engine.

After the ignition switch is turned OFF, the TCM powers-down when both input and output speeds are zero, and the appropriate data has been stored in memory. This process is normally completed in approximately two seconds. If the system has a display, the display goes blank after the process is completed. Unswitched battery power must be maintained during the power-down period.

NOTE: The TCM ignition power signal must be provided through a 5A, 10A, or 15A fuse, or a manually-reset circuit breaker.

CONDITIONS FOR RUNNING THE DTC:
1. TCM initialized and engine speed above 450 rpm for at least 10 seconds.
2. DTC test runs at .025 second intervals.

CONDITIONS FOR SETTING THE DTC:
DTC P0562 sets when the TCM detects the ignition voltage is below 5V for 18 seconds or more.

ACTION TAKEN WHEN THE DTC SETS:
1. The TCM illuminates the CHECK TRANS light.
2. TCM may not re-initialize if ignition is turned OFF.

CONDITIONS FOR CLEARING THE DTC:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without the DTC recurring.

DIAGNOSTIC AIDS:
1. A defective vehicle battery may allow this DTC to set. Test all vehicles batteries to OEM specifications for proper voltage and load capacity.
2. A defective vehicle charging system may cause this DTC. Test the charging system to all OEM specifications. Low voltage or electrically noisy alternators may prevent clean or ample ignition voltage from reaching TCM pin 63. If alternator performance is preventing clean ignition power on the vehicle, consider implementing the alternate ignition power information in Tech Data.
3. Defective or unsuppressed components in the vehicle ignition system, such as the ignition switch, TCM ignition relay, ignition circuit connector problems, fuse holders, or noisy ignition signals may cause this DTC.
4. Ignition input to the TCM must be free of unsuppressed inductive loads, such as solenoids, relays and motors. If the source for ignition power is suspected to have unsuppressed load(s) attached, consider implementing the alternate method for providing ignition voltage to the TCM. Refer to Ignition Power (Alternate) information in Tech Data. Inductive noise or ignition or relay switch bounce can create noise on ignition W163 and may cause this code. Consider diode suppressing any component such as relays that are causing inductive load noise.
5. Ignition voltage is available on the diagnostic tool data monitor grid. Prior to ‘Connect’ for the diagnostic tool, check the ‘Troubleshoot Specific Problem’ box under the “Connection Options” and then check the ‘Sensor, Voltage, Ohms, and Counts Data’ box.
6. The ignition power (W163) must stay powered continually during engine cranking, and during transition from the “crank” position of the start switch to the “ON” or “RUN” position. Once the engine is running, the wire must always remain powered in order to achieve proper operation of the relays which control the Neutral Start, Reverse Warning, and other transmission-related vehicle functions. This wire must not be powered in the “accessory” position, as it may cause significant and unnecessary drain on the battery. Ignition power W163 while in the accessory position may run the batteries down and cause this DTC.
7. Broken or defective connector assemblies allowing pushed back pins to short together.
8. Unlocked connectors, missing seal plugs allowing moisture in connectors.

Review applicable information in Control System and Transmission Specifications to find additional circuit specifications, system and connector diagrams, and troubleshooting tips.