DTC Troubleshooting: P0102 (50)
DTC P0102:
 MAF Sensor Circuit Low Input
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Check the MAF SENSOR in the DATA LIST with the HDS.
Is about 0 gm/s or 0.29 V or less indicated?
YES -
Go to Step 3 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor 1 and the ECM.■
  1. Check the No. 3 ALTERNATOR (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to Step 4 .
NO -
Repair short in the wire between the MAF sensor/IAT sensor 1 and the No. 3 ALTERNATOR (10 A) fuse, replace the fuse, then go to Step 23 .
  1. Turn the ignition switch OFF.
  1. Disconnect the MAF sensor/IAT sensor 1 5P connector.
  1. Turn the ignition switch ON (II).
  1. Measure voltage between MAF sensor/IAT sensor 1 5P connector terminal No. 3 and body ground.
Is there battery voltage?
YES -
Go to Step 8 .
NO -
Repair open in the wire between the No. 3 ALTERNATOR (10 A) fuse and the MAF sensor/IAT sensor 1, then go to Step 23 .