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DTC P0705: Malfunction of Transmission Range Switch

 
 
 
 
DIAGNOSTIC FUNCTION
TCM monitors the signal from the transmission range switch, and determines if the abnormal input is present or not.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • TCM does not detects the transmission range switch input signal when the vehicle speed is 3 km/h (2 mph) or more for 10 seconds continuously.
  • TCM detects the multiple inputs from the transmission range switch for 2 seconds.
 
 
MONITOR EXECUTION
  • Vehicle speed (no-transmission range switch signal input): 3 km/h (2 mph) or more for 10 seconds continuously
  • Vehicle speed (transmission range switch signal multiple input): No conditions
  • Voltage of battery: 10 volts or more.
 
 
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • P0711, P0712, P0713: Malfunction of the transmission fluid temperature sensor
  • P0715: Malfunction of primary pulley speed sensor
  • P0720: Malfunction of secondary pulley speed sensor
  • P0730: Incorrect gear ratio
  • P0966, P0967: Malfunction of secondary pressure solenoid valve
  • P0970, P0971: Malfunction of primary pressure solenoid valve
  • P2720, P2721: Malfunction of select pressure solenoid valve
  • P2765: Malfunction of turbine speed sensor
Sensor (The sensor below is determined to be normal)
  • Transmission fluid temperature sensor
  • Primary pulley speed sensor
  • Secondary pulley speed sensor
  • Turbine speed sensor
 
 
LOGIC FLOW CHARTS (Monitor Sequence-Input Other Rationality)
 
 
LOGIC FLOW CHARTS (Monitor Sequence-Input Open Circuit)
 
 
DTC SET CONDITIONS
Check Conditions
  • Vehicle speed over 3 km/h (2 mph): 10 seconds or more.
  • Voltage of battery: 10 volts or more.
Judgment Criteria
  • Transmission range switch: multiple signal. (2 seconds)
  • Transmission range switch: no signal. (10 seconds)
 
 
OBD-II DRIVE CYCLE PATTERN
Transmission range: D (Drive the vehicle for 10 seconds or more while the accelerator opening angle is 20% or more)
 
 
PROBABLE CAUSES
  • Malfunction of the transmission range switch
  • Improper adjustment of transaxle control cable
  • Damaged wiring harness and connectors
  • Malfunction of TCM
 
 
DIAGNOSIS
STEP 1. Voltage measurement at transmission range switch connector (terminal No. 3)
(1) Disconnect the transmission range switch connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between the transmission range switch connector (terminal No. 3) and body ground.
OK: 10 V or more
Is the check result normal?
Go to Step 2.
Repair the connector(s) or the wiring harness (power supply line between the transmission range switch connector terminal No. 3 and the ETACS-ECU connector).
 
STEP 2. Check for open circuit or short to ground in INHP, INHR, INHN and INHD line between the transmission range switch connector and the TCM connector
Is the check result normal?
Go to Step 3.
Repair the connector(s) or the wiring harness.
 
STEP 3. Transmission range switch and control cable adjustment
Refer to .
Is the check result normal?
Go to Step 4.
Adjust the transmission range switch and the control cable.
 
STEP 4. Transmission range switch continuity check
Refer to .
Is the check result normal?
Go to Step 5.
Replace the transmission range switch (Refer to ).
 
STEP 5. Voltage measurement at TCM connector (INHP, INHR, INHN and INHD terminal)
(1) Connect the transmission range switch connector.
(2) Disconnect the TCM connector, and measure at the wiring harness side.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage at each terminal when the selector lever is moved to each range.
  • At P range: Between the TCM connector (INHP terminal) and body ground
  • At R range: Between the TCM connector (INHR terminal) and body ground
  • At N range: Between the TCM connector (INHN terminal) and body ground
  • At D range: Between the TCM connector (INHD terminal) and body ground
OK: 10 V or more
Is the check result normal?
Go to Step 6.
Repair the connector(s) or the wiring harness.
 
STEP 6. Symptom recheck after erasing diagnostic trouble code
Is the diagnostic trouble code set?
Replace the TCM.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).