8206code.fm Page 99 Tuesday, July 7, 1998 11:57 AM
DIAGNOSTIC CODE 3-5 (ADVANCED) Test 16
Test 20
Determining severity and correcting the problem
Checking for wrong target, bad data file or V-MAC II module
1. Check the inactive fault table with a diagnostic tool (Pro-Link or PC).
1. Use the diagnostic tool (Pro-Link or PC) to display the engine model, data file part number and static timing.
If there are only a couple occurrences of the timing actuator fault (code 3-5) and the driver reported that the electronic fault light only came on occasionally for a brief time, there was probably a piece of debris in the timing actuator that has been flushed out. Remove the timing control valve and clean the oil supply and secondary filters. Reinstall the timing control valve, using a new gasket. Retest to be sure the problem has been corrected. If there are numerous counts of the timing actuator fault (code 3-5) or the driver reported that the electronic fault lamp remains ON constantly, the ECONOVANCE is sticking at advanced timings. Repair or replace the ECONOVANCE. Retest to be sure the problem has been corrected.
Test 18 Checking current to the timing control valve
2. Verify the following information: a. Initial (static) timing on the emissions plate agrees with the value displayed by V-MAC II. b. ECONOVANCE is approximately 5 inches long.
If the information matches but the timing is still too advanced, replace the V-MAC II module. Retest to be sure the problem has been corrected. If the information does not match, V-MAC II is trying to use a data file which may not match the engine hardware’s capabilities (static timing and timing range). Change the hardware to match the hardware requirements of the data file and attach the proper emissions plate, or download the correct data file for this engine. Retest to be sure the problem has been corrected.
If the current is between 0.6 and 0.9 amps, proceed to Test 37. If the current to the timing control valve is above the range of 0.9 to 1.1 amps, proceed to Test 36. If the current to the timing control valve is less than 0.6 amps, but greater than 0 amps, replace the V-MAC II module. Retest to be sure the problem has been corrected. If the current to the timing control valve is 0 amps, verify that there is power to the V-MAC II module. If there was no power to the V-MAC II module, restore power and retest. If there was power, and the current was 0, replace the V-MAC II module. Retest to be sure the problem has been corrected.
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