P0850

DTC P0850 PNP SWITCH

Component Description

When the selector lever position is Neutral, park/neutral position (PNP) switch is ON. (M/T)
When the selector lever position is P or N, transmission range switch is ON. (A/T and CVT)
ECM detects the position because the continuity of the line (the ON signal) exists.


CONSULT Reference Value in Data Monitor Mode

Specification data are reference values.







On Board Diagnosis Logic








DTC Confirmation Procedure


CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

WITH CONSULT

1.Turn ignition switch ON.
2.Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT. Then check the "P/N POSI SW" signal under the following conditions.





If NG, go to .
If OK, go to following step.
3.Select "DATA MONITOR" mode with CONSULT.
4.Start engine and warm it up to normal operating temperature.
5.Maintain the following conditions for at least 60 consecutive seconds.










6.Check 1st trip DTC.
7.If 1st trip DTC is detected, go to .


Overall Function Check

Use this procedure to check the overall function of the park/neutral position (PNP) signal circuit. During this check, a 1st trip DTC might not be confirmed.

WITH GST

1.Turn ignition switch ON.





2.Check voltage between ECM terminal 69 (PNP signal) and ground under the following conditions.





3.If NG, go to .


Wiring Diagram






Specification data are reference values and are measured between each terminal and ground.

CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.







Diagnosis Procedure


A/T MODELS AND CVT MODELS


1. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect transmission range switch harness connector.
3.Turn ignition switch ON.
4.Check voltage between transmission range switch terminal 1 and ground with CONSULT or tester.









Voltage: Battery voltage
OK or NG
OK- GO TO 3.
NG- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors E8, F8
- Harness for open or short between transmission range switch and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.

3. CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check harness continuity between transmission range switch terminal 2 and ECM terminal 69.
Refer to Wiring Diagram.
Continuity should exist.
4.Also check harness for short to ground and short to power.
OK or NG
OK- GO TO 4.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK TRANSMISSION RANGE SWITCH

Transmission Range Switch A (A/T), CVT (CVT).
OK or NG
OK- GO TO 5.
NG- Replace transmission range switch. Transaxle Assembly (A/T), Transaxle Assembly.

5. CHECK INTERMITTENT INCIDENT

Refer to Trouble Diagnosis For Intermittent Incident
-INSPECTION END

M/T MODELS


1. CHECK PNP SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect PNP switch harness connector.
3.Turn ignition switch ON.





4.Check voltage between PNP switch terminal 2 and ground with
CONSULT or tester.
Voltage: Battery voltage
OK or NG
OK- GO TO 3.
NG- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors E8, F8
- Harness for open or short between PNP switch and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.

3. CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check harness continuity between PNP switch terminal 3 and ECM terminal 69.
Refer to Wiring Diagram.
Continuity should exist.
4.Also check harness for short to ground and short to power.
OK or NG
OK- GO TO 4.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK PNP SWITCH

Component Tests and General Diagnostics.
OK or NG
OK- GO TO 5.
NG- Replace PNP switch. Transmission Assembly.

5. CHECK INTERMITTENT INCIDENT

Refer to Trouble Diagnosis For Intermittent Incident
-INSPECTION END