Repair Procedure A
REPAIR PROCEDURE "A" - DECHOKE / ENGINE STARTING1. Verify concern.
2. Verify battery is fully charged. Charge if necessary.
3. Disconnect the secondary air injection pump electrical connector (B1-04).
NOTE:
This will protect the catalytic converter by preventing rapid light off due to unburned fuel purging from the engine in the following steps.
4. Attempt to start the engine observing the following:
A. Fully depress the accelerator pedal to the floor (dechoke (clear flood) mode prevents fuel injection operation while cranking).
B. Crank the engine for up to ten seconds.
^ If the engine starts, proceed to STEP 5.
^ If the engine fails to start, proceed to next step.
C. Release ignition key from start position (shut engine off) for 5-seconds.
D. Crank the engine for up to ten seconds (DO NOT depress accelerator pedal).
^ If the engine starts, proceed to STEP 5
^ If the engine fails to start, perform REPAIR PROCEDURE "B" COMBUSTION CHAMBER CLEANING & SPARK PLUG REPLACEMENT
5. Keep engine running between 1500-2000 RPM until engine speed has stabilized. Maintain this engine speed until all smoke has dissipated and / or engine has come to lull operating temperature.
NOTE:
Do not race the engine, this may cause catalyst damage.
6. Shut engine off.
7. Connect the secondary air injection pump connector B1-04.
8. Check current PCM calibration by accessing MODE 9 using WDS. Go to STEP 12 if production date of vehicle is 3/12/04 or later and VIN is JMlFE17**40135537 or later.
9. If calibration level is not at or above "M", proceed to next step. If calibration level is at or above "M", proceed to STEP 11.
NOTE:
MODE 9 calibration is displayed as N311*EM000********. The digit following the "E" is the current calibration level of the PCM.
10. Reprogram PCM using WDS. Update WDS to version B30.6 or later if necessary.
11. Clear all stored DTCs.
12. Perform drive mode 1 & 3 as follows:
^ Mode 1 (PCM Adaptive Memory Produce Drive Mode)
1. Start the engine and warm it up completely.
2. Verify the following conditions and correct if necessary:
^ All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
^ Initial ignition timing and idle speed are within specification.
3. Run engine at a no load speed of 2500-3500 RPM for more than 15 seconds.
4. Continuously run engine at a no load speed of 4500-5000 RPM for more than 15 seconds.
5. Idle the engine for more than 60 seconds after the cooling fan has stopped.
6. Turn the ignition switch off.
^ Mode 3 (HO2S Heater, HO2S, and TWC Repair Verification Drive Mode)
1. Perform the Mode 1 first.
2. Verify that all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
3. Drive vehicle as shown in the graph. The driving condition before driving at constant speed is not specified.
4. Stop the vehicle and access the ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
^ If completed, RFC changes from NO to YES.
^ If not completed, turn the ignition switch off, then go back to STEP 3 of this (Mode 3) procedure.
5. Access the DIAGNOSTIC MONITORING TEST RESULTS to inspect monitor results.
^ If MEAS are not within specification, repair has not been completed.
6. Verify that no DTCs are available.
13. Access "DIAGNOSTIC MONITORING TEST RESULT" (Mode 6) data using WDS.
14. Record MIN MAX VALUE from CATALYST BANK 1 MONITOR - REAR TO FRONT SWITCHING RATION - TEST ID 10:21:80.
15. If measured value is not within MIN and MAX range, replace the catalytic converter.
16. Erase all DTCs and confirm repairs.