DTC Troubleshooting: P1069 (13)
DTC P1069:
 BARO Sensor/MAP Sensor Incorrect Voltage Correlation
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Check the BARO SENSOR in the DATA LIST with the HDS.
Is atmospheric pressure indicated?
YES -
Go to Step 3 .
NO -
Go to Step 13 .
  1. Check the MAP SENSOR in the DATA LIST with the HDS.
Is atmospheric pressure indicated?
YES -
Go to Step 4 .
NO -
Go to Step 6 .
  1. Start the engine. Hold the engine speed at 2,000 rpm (min −1 ) without load (in neutral) until the radiator fan comes on, then let it idle.
  1. Monitor the OBD STATUS for DTC P1069 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES -
NO -
If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM. If the screen indicates NOT COMPLETED, go to Step 4 and recheck.
  1. Turn the ignition switch OFF.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Start the engine. Hold the engine speed at 2,000 rpm (min −1 ) without load (in neutral) until the radiator fan comes on, then let it idle.
  1. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC P1069 indicated?
YES -
Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM, then go to Step 1 .
NO -
Go to Step 12 .
  1. Monitor the OBD STATUS for DTC P1069 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in Step 11 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 10 .
  1. Reconnect all connectors.
  1. Start the engine. Hold the engine speed at 2,000 rpm (min −1 ) without load (in neutral) until the radiator fan comes on, then let it idle.
  1. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC P1069 indicated?
YES -
Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 15 . If the ECM was substituted, go to Step 1 .
NO -
Go to Step 17 .
  1. Monitor the OBD STATUS for DTC P1069 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs were indicated in Step 16 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 15 . If the screen indicates NOT COMPLETED, go to Step 15 .