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DRIVEABILITY - NGC
Symptom:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored and Set Condition:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored: With the ignition key on. No Cam or Crank signal within 75 ms. Engine
speed at less than 250 RPM.
Set Condition: The PCM senses the voltage from the MAP sensor to be less than 2.196
volts but above 0.0392 of a volt for 300 milliseconds.One Trip Fault.
IAC SIGNAL CIRCUIT LOW
IAC SIGNAL CIRCUIT HIGH
INTERMITTENT CONDITION
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K6) 5 VOLT SUPPLY CIRCUIT OPEN
MAP SENSOR INTERNAL FAILURE
(K1) MAP SIGNAL CIRCUIT OPEN
(K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND
PCM (K6) 5 VOLT SUPPLY CIRCUIT
PCM (K1) MAP SIG CIRCUIT
TEST
1
NOTE: Refer to any TSBs that may apply to this DTC before proceeding.
Ignition on, engine not running.
With the DRBIII , read the MAP Sensor voltage.
Is the voltage below 2.2 volts.
Yes → Go To 2
→ Go To 11
No
2
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K6) 5 Volt Supply circuit in the MAP Sensor harness
connector.
Is the voltage between 4.5 to 5.2 volts?
Yes → Go To 3
→ Go To 7
No
POSSIBLE CAUSES
ACTION
86
APPLICABILITY
All
All
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