DTC P07A2
DTC P07A2: Clutch A Performance
General Description
The transmission control module (TCM) monitors actual gear ratio (the ratio of input speed and output speed of the transmission) while driving at a fixed gear. If the TCM detects unexpected actual gear ratio due to clutch slip, abnormal hydraulic pressure, and/or mechanically abnormal in the transmission, the TCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
*: MIL comes on at second drive cycle
| Duration | Depending on the driving conditions |
| DTC Type | One drive cycle, MIL on*, A/T gear position indicator blinks |
*: MIL comes on at second drive cycle
Enable Conditions
| Condition | Minimum | Maximum | |
|---|---|---|---|
| ATF temperature [ATF Temperature] | -40 °F (-40 °C) | - | |
| Engine speed [Engine Speed] | 400 rpm | - | |
| Shift position/mode | D, R | ||
[ ]: HDS Parameter
Malfunction Threshold
Abnormal gear ratio is detected 3 times while the vehicle is driven at clutch B engaged.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Transmission internal failure
- Hydraulic control unit internal failure
Confirmation Procedure
Operating Condition
- 1.
Start the engine.
- 2.
Drive the vehicle, and let the transmission shift through several gears.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, the A/T gear position indicator blinks and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on.
Conditions for clearing the DTC
The A/T gear position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.