Up to VIn #386333
DTC P0850 PNP SWITCH
Component Description
When the shift lever position is P or N (A/T, CVT), Neutral (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-III Reference Value in Data Monitor Mode
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-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.
If NG, go to "Diagnosis Procedure".
If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT-III.
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 "Diagnosis Procedure".
Overall Function Check
Use this procedure to check the overall function of the park/neutral position (PNP) switch 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 switch signal) and ground under the following conditions.
3. If NG, go to "Diagnosis Procedure".
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
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 1 and ground with
CONSULT-III 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 SWITCH 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 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 PNP SWITCH
Refer to Automatic Transmission.
OK or NG
OK >> GO TO 5.
NG >> Replace PNP switch.
5.CHECK INTERMITTENT INCIDENT
Refer to Up to VIn #386333 Up to VIn #386333.
>> 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-III 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 SWITCH 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
Refer to Position Switch.
OK or NG
OK >> GO TO 5.
NG >> Replace PNP switch.
5.CHECK INTERMITTENT INCIDENT
Refer to Up to VIn #386333 Up to VIn #386333.
>> INSPECTION END
CVT MODELS
1.CHECK DTC WITH TCM
Refer to OBD-II Diagnostic Trouble Code (DTC).
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2.CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Yes or No
Yes >> GO TO 3.
No >> Refer to Description and Operation.
3.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM and TCM harness connectors.
3. Check harness continuity between TCM terminal 24 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 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F8, E8
- Harness for open or short between TCM and ECM.
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Refer to Up to VIn #386333 Up to VIn #386333.
>> INSPECTION END