Battery — disconnection and reconnection
Caution: Always disconnect the cable from the negative battery terminal FIRST and hook it up LAST or the battery may be shorted by the tool being used to loosen the cable clamps.
1 Some systems on the vehicle require battery power to be available at all times, either to maintain continuous operation (alarm system, power door locks, etc.), or to maintain control unit memory (radio station presets, Powertrain Control Module and other control units). When the battery is disconnected, the power that maintains these systems is cut. So, before you disconnect the battery, please note that on a vehicle with power door locks, it’s a wise precaution to remove the key or keyless entry fob, so that it does not get locked inside if the power door locks should engage accidentally when the battery is reconnected!
2. Devices known as «memory-savers» can be used to avoid some of these problems. Precise details vary according to the device used. The typical memory saver is plugged into the cigarette lighter and is connected to a spare battery. Then the vehicle battery can be disconnected from the electrical system. The memory saver will provide sufficient current to maintain audio unit security codes, PCM memory, etc. and will provide power to always hot circuits such as the clock and radio memory circuits.
Warning: Some memory savers deliver a considerable amount of current in order to keep vehicle systems operational after the main battery is disconnected. If you’re using a memory saver, make sure that the circuit concerned is actually open before servicing it.
Warning: If you’re going to work near any of the airbag system components, the battery MUST be disconnected and a memory saver must NOT be used. If a memory saver is used, power will be supplied to the airbag, which means that it could accidentally deploy and cause serious personal injury.
Disconnection
3. Install a memory saver device to avoid having to reprogram several of the vehicle’s systems (see above).
Warning: If you’re working near any airbag system component, DO NOT use a memory saver.
4. To disconnect the battery for service procedures requiring power to be cut from the vehicle, loosen the cable end bolt and disconnect the cable from the negative battery terminal. Isolate the cable end to prevent it from coming into accidental contact with the battery terminal.
Reconnection
5. Connect the positive battery cable first (if it was disconnected), followed by the negative cable.
6. After reconnecting the battery, several re-learn procedures must be performed. These include (and are specific to all model years unless otherwise noted):
- ) Steering angle sensor position learning
- ) Idle air volume learning
- ) Power window initialization and anti-pinch feature*
- ) Sunroof memory and anti-pinch feature*
- ) Radio presets*
- ) Navigation system adjustment*
* If a memory saver was used when the battery was disconnected, these functions won’t have to be performed. Refer to your owner’s manual for information on resetting the radio presets and navigation system adjustment.
Steering angle sensor position learning
7. This procedure MUST be performed by a qualified repair facility using specialized equipment.
Note: It is possible that driving the vehicle on a long straight stretch of road may reset the sensor and turn the light off on the instrument cluster.
Idle air volume learning
8. Ensure all of the following conditions are met. If any of the following conditions are not met, learning will be canceled.
A) Battery voltage greater than 12.9 V at idle
B) Engine coolant at operating temperature (158 to 212°F [70 to 100°C])
C) Gearshift lever in P or N (automatic) or Neutral (manual)
D) All electrical loads are turned off (AC, headlights, etc.)
E) Steering wheel pointed in the straight-ahead position
F)Vehicle stopped
G) Transaxle is at operating temperature (drive vehicle for 10 minutes to ensure operating temperature is reached)
9. Perform the Accelerator pedal released position learning procedure (see Steps 21 through 26).
10. Perform the Throttle valve closed position learning procedure (see Steps 27 through 30).
11. Start the engine and confirm the above-mentioned conditions have been met before continuing.
12. Turn the ignition off and wait a minimum of 10 seconds.
13. With your foot completely off the accelerator, and no objects resting on it (such as floor mats), turn the ignition to the ON position and wait for 3 seconds.
14. Fully press and release the accelerator pedal 5 times within 5 seconds of turning the ignition ON.
15. Wait 7 seconds, then press and hold the accelerator pedal to the floor for 20 seconds until the CHECK ENGINE (MIL) light stops blinking and lights up solidly.
16. Release the accelerator pedal within 3 seconds of the MIL lighting solidly.
17. Start the engine and allow it to idle for at least 20 seconds.
18. Rev the engine two or three times, then allow it to idle. Idle speed and ignition timing should be as follows:
- ) Automatic transaxle: 700 RPM +/- 50 RPM; timing 13 +/- 5 degrees BTDC in P or N position
- ) Manual transaxle: 700 RPM +/- 50 RPM; timing 13 +/- 5 degrees BTDC in neutral position
19. This completes the idle air volume learning procedure.
20. If the procedure cannot be completed successfully, check the following:
- ) Verify the throttle valve plate is fully closed
- ) Check PCV operation
30. This completes the throttle valve closed learning procedure.
Power window initialization and anti-pinch feature check
31. Close all doors.
32. Turn the ignition to the ON position.
33. Open the window completely (if it isn’t already).
34. Pull the power window switch up to close the window, holding the switch in the Up position for at least four seconds after the glass has closed completely. Sometimes an audible click can be heard when the position sets.
35. Open the window completely, then place a piece of wood or another object near the top of the window frame.
Warning: Do not use any part of your body for this check.
36. Using the AUTO-UP feature, close the window; confirm that the window automatically reverses direction as soon as it contacts the object.
Sunroof initialization and anti-pinch feature check
37. Turn the ignition to the ON position.
38. Operate the sunroof switch in the tilt up position; hold it there until the sunroof has tilted up completely, then release the switch.
39. Within 5 seconds of releasing the switch, press and hold the switch in the tilt up position again. The sunroof should back up after a pause; release the switch.
Caution: If the next step is not completed and the sunroof switch is released too early, repeat the entire procedure.
40. Within five seconds, push the switch to the tilt up position again and hold it there; the sunroof should move from the tilt up position to the fully open position, then back to the fully closed position. Release the switch.
41. Open the sunroof completely, then place a piece of wood or another object near the front of the sunroof opening.
Warning: Do not use any part of your body for this check.
42. Operate the sunroof switch with the auto-close function and verify that the sunroof does not pinch the object.