TCM
Reference Value
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-safe
The TCM has an electrical fail-safe mode. In this mode TCM operates even if there is an error in a main electronic control input/output signal circuit.
FAIL-SAFE FUNCTION If any malfunction occurs in a sensor or solenoid valve, this function controls the CVT to make driving possible.
Secondary Speed Sensor The shift pattern is changed in accordance with the throttle position when an unexpected signal is sent from the secondary speed sensor to the TCM. The manual mode and "DS" mode are inhibited, and the transaxle is put in "D".
Primary Speed Sensor The shift pattern is changed in accordance with the throttle position and secondary speed (vehicle speed) when an unexpected signal is sent from the primary speed sensor to the TCM. The manual mode and "DS" mode are inhibited, and the transaxle is put in "D".
Transmission Range Switch If an unexpected signal is sent from the transmission range switch to the TCM, the transaxle is put in "D".
CVT Fluid Temperature Sensor
If an unexpected signal is sent from the CVT fluid temperature sensor to the TCM, the gear ratio in use before receiving the unexpected signal is maintained or the gear ratio is controlled to keep engine speed under 5,000 rpm.
Secondary Pressure Sensor
If an unexpected signal is sent from the secondary pressure sensor to the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the non-standard condition occurs is used to control line pressure.
If secondary pressure sensor error signal is inputted to the TCM, secondary pressure feedback control stops, but line pressure is controlled normally.
Line Pressure Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the line pressure solenoid valve is turned OFF to achieve the maximum fluid pressure.
Secondary Pressure Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the secondary pressure solenoid valve is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the torque converter clutch solenoid valve is turned OFF to cancel the lock-up.
Step Motor
If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases "A" through "D" are all turned OFF to hold the gear ratio used just before the non-standard condition occurred.
Lock-up Select Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the lock-up select solenoid valve is turned OFF to cancel the lock-up.
TCM Power Supply (Memory Back-up)
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for controlling) from the battery is not supplied to the TCM. Normal status is restored when turning the ignition switch OFF to ON after the normal power supply.
DTC Inspection Priority Chart
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart.
NOTE: If DTC "U0100/U1000/U1010/P1709" is indicated with other DTCs, start from a diagnosis for DTC "U0100/U1000/U1010/P1709". Refer to TM-42 (U0100), TM-43 (U1000), TM-44 (U1010), TM-99 (P1709).
DTC Index
NOTE: If DTC "U0100/U1000/U1010/P1709" is indicated with other DTCs, start from a diagnosis for DTC "U0100/U1000/U1010/P1709". Refer to TM-42 (U0100), TM-43 (U1000), TM-44 (U1010), TM-99 (P1709).
Diagnosis system (IPDM E/R)
Diagnosis Description
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM E/R sends a drive signal to the following
systems to check their operation.
Oil pressure warning lamp
Front wiper (LO, HI)
Parking lamps
Side marker lamps
License plate lamps
Tail lamps
Front f ...
P0181 FTT sensor
Description
The fuel tank temperature sensor is used to detect the fuel temperature
inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temperature
input. The sensor uses a thermistor which is sensitive to the
chang ...
Door mirror remote control switch
CHANGEOVER SWITCH
CHANGEOVER SWITCH : Description
Changeover switch is integrated into door mirror remote control switch.
Changeover switch has three positions (L, N and R).
It changes door mirror
motor operation by transmitting control signal to automatic drive positioner
control unit.
C ...