B1571

DTC B1571: Combination Meter Spec Signal Failure

DTC Detecting Condition and Trouble Area






DTC Troubleshooting

1.
Was "Air Conditioning System Check" performed?
YES -
Go to Step 2.
NO -
Go to Air Conditioning System Check Air Conditioning System Check:Auto A/C.

2. Scan tool data check

Connect scan tool to DLC with ignition switch turned OFF position.
Ignition switch turned ON and select "Scan Tool Data" mode.
Check "Meter Spec" displayed on scan tool.

Is value of combination meter spec signal within specified ranges displayed in "Scan Tool Data"?
YES -
Substitute a known-good HVAC control module and recheck.
NO -
Go to step 3.

3. Scan tool data check

Check "Meter Spec" displayed on scan tool.

Is "-" displayed on scan tool data?
YES -
Check CAN communication circuit referring to DTC Check DTC Check.
NO -
Substitute a known-good BCM and recheck.