P0850

P0850 PNP SWITCH





Description
For CVT models, transmission range switch is turn ON when the selector lever is P or N.
For M/T models, park/neutral position (PNP) range switch is ON when the selector lever is Neutral position.
ECM detects the position because the continuity of the line (the ON) exists.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES - GO TO 2.
NO - GO TO 5.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 3.
3.CHECK PNP SWITCH FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT-III. Then check the "P/N POSI SW" signal under the following conditions.





Is the inspection result normal?
YES - GO TO 4.
NO - Go to P0850.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Select "DATA MONITOR" mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 60 consecutive seconds.

CAUTION:
Always drive vehicle at a safe speed.





4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Go to P0850.
NO - INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. P0850.

NOTE:
Use component function check the overall function of the transmission range switch circuit (CVT models) or the park/neutral position (PNP) switch circuit (M/T models). During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES - INSPECTION END
NO - Go to P0850.




Component Function Check
1.PERFORM COMPONENT FUNCTION CHECK
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground under the following conditions.





Is the inspection result normal?
YES - INSPECTION END
NO - Go to P0850.




Diagnosis Procedure
1.CHECK TRANSMISSION RANGE SWITCH (CVT) OR PNP SWITCH (M/T) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect transmission range switch (CVT) or park/neutral position (PNP) switch (M/T) harness connector.
3. Turn ignition switch ON.
4. Check the voltage between transmission range switch (CVT) or PNP switch (M/T) harness connector and ground.










Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E8, F1
- IPDM E/R harness connector E43 (M/T)
- IPDM E/R harness connector E45 (CVT)
- 10 A fuse (No. 3) (M/T)
- 10 A fuse (No. 56) (CVT)
- Harness for open or short between PNP switch and fuse
Is the inspection result normal?
- Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between transmission range switch (CVT) or PNP switch (M/T) harness connector and ECM harness connector.










4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 4.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK TRANSMISSION RANGE SWITCH (CVT) OR PNP SWITCH (M/T)
P0705 (CVT) or Back-Up Lamp Switch Back-Up Lamp Switch Park/Neutral Position (PNP) Switch Park/Neutral Position (PNP) Switch, (M/T)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace transmission range switch (CVT) or PNP switch (M/T).
5.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END