P1248
DTC P1248: AWD PlausibilityTECHNICAL DESCRIPTION
Checks for an abnormal signal of AWD-ECU.
DTC SET CONDITIONS
Check Condition
- Ignition switch is "ON" position.
Judgment Criterion
- The torque reduction requested signal from AWD-ECU is abnormal.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- AWD system failed.
- ECM failed.
DIAGNOSIS
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC).
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Read the A/T-DTC.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the electronic control AWD-DTC set?
YES: Refer to Electronic Control AWD - Diagnostic Trouble Code Chart.
NO: Go to Step 2.
STEP 2. Using scan tool MB991958, read the diagnostic trouble code (DTC).
1. Turn the ignition switch to the "ON" position.
2. After the DTC has been deleted, read the DTC again.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P1247 set?
YES: Replace the ECM. When the ECM is replaced, register the ID code. Refer to ID Code Registration Judgment Table
NO: It can be assumed that this malfunction is intermittent.