Turn the vehicle to the ON mode, and wait 2 seconds.
?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
MAF SENSOR
Less than 0.1
V
Do the current condition(s) match the threshold?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Open wire check (IG1 ACG/IG1(MAIN)/IG1(AFM) line):
Open wire check (IG1 ACG/IG1(MAIN)/IG1(AFM) line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
MAF sensor/IAT sensor 5P connector
?3.
Turn the vehicle to the ON mode.
?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
MAF sensor/IAT sensor 5P connector: disconnected
Test point 1
MAF sensor/IAT sensor 5P connector No. 3
Test point 2
Body ground
Is there battery voltage?
YES
The IG1 ACG/IG1(MAIN)/IG1(AFM) wire is OK. Go to step 3.
NO
Repair an open in the IG1 ACG/IG1(MAIN)/IG1(AFM) wire between the MAF sensor/IAT sensor and the No. B2 (10 A) fuse in the under-dash fuse/relay box.?
3.
Determine possible failure area (VGP line, others):
Determine possible failure area (VGP line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
MAF sensor/IAT sensor 5P connector: disconnected
Test point 1
MAF sensor/IAT sensor 5P connector No. 5
Test point 2
Body ground
Is there 190?210 k??
YES
Go to step 6.
NO
Go to step 4.
4.
Shorted wire check (VGP line):
Shorted wire check (VGP line)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.
?2.
Disconnect the following connector.
PCM connector B (51P)
?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
MAF sensor/IAT sensor 5P connector: disconnected
PCM connector B (51P): disconnected
Test point 1
MAF sensor/IAT sensor 5P connector No. 5
Test point 2
Body ground
Is there continuity?
YES
Repair a short in the VGP wire between the PCM (B32) and the MAF sensor/IAT sensor.?
The VGP wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0102 goes away and the PCM was updated, troubleshooting is complete. If DTC P0102 goes away and the PCM was substituted, replace the original PCM.?
NO
Repair an open in the VGP wire between the PCM (B32) and the MAF sensor/IAT sensor.?
Hold the engine speed at 2,000 rpm without load (in P or N).
?7.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0102 MAF Sensor Circuit Low Voltage
Is DTC P0102 indicated?
YES
The MAF sensor/IAT sensor is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0102 goes away and the PCM was updated, troubleshooting is complete. If DTC P0102 goes away and the PCM was substituted, replace the original PCM.?