Mazda Mazda6 - Dtc P0850

F2–160
ON-BOARD DIAGNOSTIC
DTC P0850
A6E407001082243
Diagnostic procedure
DTC P0850 Neutral switch circuit malfunction
DETECTION
CONDITION
• PCM monitors input voltage from neutral switch while engine is running. If input voltage from neutral switch
does not change when vehicle stops after accelerating to above 60 km/h {37 mph} and decelerating to 0
km/h {0 mph} two times, PCM determines neutral switch circuit malfunction.
POSSIBLE
CAUSE
• Neutral switch malfunction
• Connector or terminal malfunction
• Short to GND in wiring between neutral switch terminal A and PCM terminal 56
• Open circuit in wiring between neutral switch terminal B and GND
• Open circuit in wiring between neutral switch terminal A and PCM terminal 56
• PCM malfunction
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
2 CLASSIFY MALFUNCTION OF SHORT TO GND
OR OPEN
• Turn engine switch to ON (Engine OFF).
• Engage gear.
• Access CPP/PNP PID using WDS or
equivalent.
• Is CPP/PNP PID OFF?
Yes Go to Step 5.
No Go to next step.
A
B
A
B
NEUTRAL SWITCH
56
PCM
56
3
6
5
5
7
4
9
8
NEUTRAL SWITCH
HARNESS SIDE CONNECTOR
PCM
HARNESS SIDE CONNECTOR