DTC P0102
DTC P0102 : MAF Sensor Circuit Low Voltage
| DTC Description | Confirmed DTC | Pending DTC |
|---|---|---|
| P0102 MAF Sensor Circuit Low Voltage |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit MAF Sensor Voltage Less than 0.10 V Data List
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 MAF sensor/IAT sensor 1 and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .
- Open wire check (IG1 ACG/IG1(AFM) line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
MAF sensor/IAT sensor 1 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 1 5P connector: disconnected Test point 1 MAF sensor/IAT sensor 1 5P connector (female terminals) No. 1: Test point 2 Body ground Is there battery voltage?
YES
Go to step 3.
NO
Repair an open in the IG1 ACG/IG1(AFM) wire between No. C21 fuse and MAF sensor/IAT sensor 1.
- 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 1 5P connector: disconnected Test point 1 MAF sensor/IAT sensor 1 5P connector (female terminals) No. 3: Test point 2 Body ground Is there 190-210 kΩ?
YES
Go to step 6.
NO
Go to step 4.
- 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 E (80P) -3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode MAF sensor/IAT sensor 1 5P connector: disconnected PCM connector E (80P): disconnected Test point 1 MAF sensor/IAT sensor 1 5P connector (female terminals) No. 3: Test point 2 Body ground Is there continuity?
YES
Repair a short in the VGP wire between the PCM (E61) and MAF sensor/IAT sensor 1.
NO
The VGP wire is not shorted. Go to step 5.
- Open wire check (VGP line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode MAF sensor/IAT sensor 1 5P connector: disconnected PCM connector E (80P): disconnected Test point 1 MAF sensor/IAT sensor 1 5P connector (female terminals) No. 3: Test point 2 PCM connector E (80P) No. 61 Is there continuity?
YES
The VGP wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. 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 (E61) and MAF sensor/IAT sensor 1.
- MAF sensor/IAT sensor 1 check
-1. Substitute a known-good MAF sensor/IAT sensor 1 .
-2. Reconnect all connectors.
-3. Turn the vehicle to the ON mode.
-4. Clear the DTC with the HDS.
-5. Enter the maintenance mode, then start the engine .
-6. Hold the engine speed at 2000 RPM without load (in P or N).
-7. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC P0102 MAF Sensor Circuit Low Voltage DTC (PGM-FI)
Is DTC P0102 indicated?
YES
MAF sensor/IAT sensor 1 is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If DTC P0102 goes away and the PCM was substituted, replace the original PCM .
NO