Engine Control System - SFI System
2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DTC P0705 - Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
MONITOR DESCRIPTION
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D). The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Condition (C):
TYPICAL MALFUNCTION THRESHOLDS
1. One of the following conditions is met: Conditions (A), (B) and (C)
Condition (A):
Condition (B):
Condition (C):
Condition (D):
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: According to the Data List displayed by the Techstream, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the Data List as the first step of troubleshooting is one method to shorten labor time.
NOTE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
1. READ DATA LIST
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn on the Techstream.
(e) Enter the following menus: Powertrain / Engine / Data List.
(f) According to the display on the Techstream, read the "Data List".
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION SWITCH)
(a) Disconnect the park/neutral position switch connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK ECM (OUTPUT SIGNAL)
(a) Turn the engine switch on (IG).
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY)
(a) Disconnect the B36 park/neutral position switch connector.
(b) Remove the ST relay from the engine room relay block.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (check for open):
Standard resistance (check for open):
(d) Reinstall the ST relay.
(e) Reconnect the park/neutral position switch connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT ST RELAY
(a) Remove the ST relay from the engine room relay block.
(b) Measure the resistance between the terminals.
Standard resistance:
(c) Reinstall the ST relay.
NG -- REPLACE ST RELAY
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)
(a) Remove the ST relay from the engine room relay block.
(b) Measure the resistance between the terminals.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
(a) Disconnect the B36 park/neutral position switch connector.
(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.
Standard resistance:
(c) Reconnect the park/neutral position switch connector.
NG -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR
(a) Disconnect the ECM connectors.
(b) Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Standard voltage:
HINT: *: The voltage will drop slightly due to lighting up of the back up light.
(c) Reconnect the ECM connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR
(a) Disconnect the transmission control switch connector from the shift lock control unit assembly.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(d) Reconnect the transmission control switch connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. INSPECT TRANSMISSION CONTROL SWITCH
(a) Disconnect the E84 transmission control switch connector.
(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.
Standard resistance:
(c) Reconnect the transmission control switch.
NG -- REPLACE TRANSMISSION CONTROL SWITCH
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR
(a) Disconnect the ECM connectors.
(b) Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Standard voltage:
HINT: The voltage will drop slightly due to lighting up of the back up light.
(c) Reconnect the ECM connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
11. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
(a) Turn the engine switch off.
(b) Disconnect the B12 ECM connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(d) Reconnect the connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM