DDEC III/IV Single ECM Troubleshooting – Section 62.3 Troubleshooting Flash Code 62

Section 62.3
Troubleshooting Flash Code 62

The following procedure will troubleshoot Flash Code 62.‪

Section 62.3.1
Code Check

Perform the following steps to check for codes.‪

1. Turn vehicle ignition ON.
2. Plug in the diagnostic data reader (DDR).
3. Record codes logged.
4. Clear codes.
5. Start and run the engine for one minute.
   1. If the code becomes active, refer to "62.3.3 Auxiliary Output Cavity Determination" .
   2. If the code does not become active, refer to "62.3.2 Intermittent Code Check" .

Section 62.3.2
Intermittent Code Check

Perform the following steps to check intermittent codes.‪

1. Perform road test.
   1. If the code returns, refer to "62.3.3 Auxiliary Output Cavity Determination" .
   2. If the code does not display again, return the vehicle to service, or refer to "10.1.1 Diagnosis by Symptom" .

Section 62.3.3
Auxiliary Output Cavity Determination

Perform the following steps to determine which auxiliary output cavity is associated with the logged codes.‪

1. Determine which auxiliary output cavity is associated with the code or codes being logged. The SAE code descriptions of the flash codes and the DDC wire numbers are listed in Table "Auxiliary Output Cavities" . Continue troubleshooting. Refer to "62.3.4 Electrical Check" .

   SAE Code Description - Flash Code ‪	DDC Wire Number ‪	Cavity ‪
   Auxiliary Output #1‪ (026 3 or 026 4) 62‪	499‪	F3 (VIH)*‪
   Auxiliary Output #2‪ (040 3 or 040 4) 62‪	555‪	A2 (VIH)‪
   Auxiliary Output #5‪ (053 3 or 053 4) 62‪	563‪	W3 (ESH) †‪
   Auxiliary Output #6‪ (054 3 or 053 4) 62‪	564‪	X3 (ESH)‪
   Auxiliary Output #7‪ (055 3 or 055 4) 62‪	565‪	Y3 (ESH)‪
   Auxiliary Output #8‪ (056 3 or 056 4) 62‪	988‪	A1 (VIH)‪

   Table 1. Auxiliary Output Cavities

   Note: * Vehicle Interface Harness

   Note: † Engine Sensor Harness

Section 62.3.4
Electrical Check

Perform the following steps to check connectors, dash light or vehicle power-down relay, or item being driven.‪

1. Check the connectors of the output wire associated with the code logged at the vehicle harness connector or engine sensor harness connector.
2. Check the connectors of the output wire associated with the code logged at the item being driven.
   1. If the connectors are not good, repair or replace the terminals. Refer to "62.3.6 Verify Repairs" .
   2. If the connectors are good and the items being driven (e.g. relay, light) are not in good condition, repair or replace the device. (Contact OEM for test procedure.) Refer to "62.3.6 Verify Repairs" .
   3. If the connectors are good and the items being driven (e.g. relay, light, are in good condition, refer to "62.3.5 Measure Resistance" .

Section 62.3.5
Measure Resistance

Perform the following steps to measure the resistance.‪

1. Turn ignition OFF.
2. Connect the engine sensor harness or vehicle interface harness (connector with output fault).
3. Disconnect the output wire associated with the code logged at the component.
4. Measure the resistance between the removed connector and the ECM case.
   1. If the reading is 47,000 Ω (± 3,000 Ω), contact Detroit Diesel Technical Service.
   2. If the reading is greater than 50,000 Ω, this wire is shorted to the battery or open. Repair or replace this wire. Refer to "62.3.6 Verify Repairs" .

Section 62.3.6
Verify Repairs

Perform the following steps to verify repairs.‪

1. Reconnect all connectors.
2. Plug DDR into the connector.
3. Clear all codes.
4. Start and run the engine.
   1. If the output code returns, refer to "62.3.1 Code Check" .
   2. If the output code does not return, troubleshooting is complete.