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DDEC® III/IV SINGLE ECM TROUBLESHOOTING GUIDE

13.4 TROUBLESHOOTING ADD COOLANT LEVEL SENSOR

Troubleshooting 111 6, Flash Code 13 follows: Listed in Table 13-1, are the flash codes for Add Coolant Level Sensor (ACLS) problems.

Flash Code

13 16 43 89

PID FMI

111 6 111 5 111 1 111 12

Description

ACLS failed low ACLS failed high Coolant level low (ACLS) ACLS Fault

Typical Cause

Signal wire (#906) shorted low (ground) Open or poor ground; open signal wire Coolant level below probe Coolant reported low on main CLS, with ACLS okay

Table 13-1

Troubleshooting Add Coolant Level Sensor

13.4.1

Check Sensor

Perform the following steps to check the sensor. 1. Unplug the ACLS. 2. Start the engine. 3. Plug in the DT. Read codes. [a] If code 13 (111 6) displays, go to Refer to section 13.4.2. [b] If code 16 (111 5) displays, replace the ACLS; then go to test. Refer to section 13.4.5.

13.4.2

Check for Short

Perform the following steps to check for a short: 1. Turn ignition OFF. 2. Unplug the ACLS module. 3. Measure the resistance between cavities A and B of the ACLS connector. See Figure 13-3. [a] If the measured resistance is greater than 10

, refer to section 13.4.3. [b] If the measured resistance is less than 10

, #116 and ground wires are shorted. Repair or replace the wires and test. Refer to section 13.4.5.

All information subject to change without notice.

(Rev. 3/01)

6SE497 0006 Copyright © 2001 DETROIT DIESEL CORPORATION

From Bulletin 1­SECM-01 Rev.

13-7

13.4

TROUBLESHOOTING ADD COOLANT LEVEL SENSOR

See Figure 13-4 for MAS pigtail.

Figure 13-3

Add Coolant Level Sensor Installation

(Rev. 3/01)

All information subject to change without notice.

13-8

From Bulletin 1­SECM-01 Rev.

6SE497 0006 Copyright © 2001 DETROIT DIESEL CORPORATION

DDEC® III/IV SINGLE ECM TROUBLESHOOTING GUIDE

Figure 13-4

MAS Pigtail

13.4.3

Check for Voltage

Perform the following steps to check for voltage: 1. Turn ignition ON. 2. Measure voltage between cavities E and C of the ACLS module connector. See Figure 13-3. [a] If the measurement is 11.0 volts or greater, refer to section 13.4.4. [b] If the measurement is less than 11.0 volts, determine the reason for the loss of ignition voltage.

All information subject to change without notice.

(Rev. 3/01)

6SE497 0006 Copyright © 2001 DETROIT DIESEL CORPORATION

From Bulletin 1­SECM-01 Rev.

13-9

13.4

TROUBLESHOOTING ADD COOLANT LEVEL SENSOR

13.4.4

Check for Open Signal

Perform the following steps to check for open signal: 1. Turn ignition OFF. 2. Unplug the engine harness 30­pin connector. 3. Measure resistance between cavities D and C of the ACLS module connector. See Figure 13-3. [a] If the measured resistance is greater than 10

, replace the ACLS module; then, refer to section 13.4.5. [b] If the measured resistance is less than 10

, the signal wire is shorted to the battery ground wire. Repair the short; replace the wire. Refer to section 13.4.5.

13.4.5

Test Repair

Perform the following steps to test the repair: 1. Connect all the removed connectors. 2. Start and run the engine for 5 minutes. 3. Plug in the DDR. 4. Read the active codes. [a] If no codes display, the repairs are complete. Return the unit to service. [b] If code 13 displays, troubleshooting is complete; review these steps to find the error. [c] If any codes other than code 13 display, refer to the DDEC III/IV Single ECM Troubleshooting Manual 6SE497.

(Rev. 3/01)

All information subject to change without notice.

13-10

From Bulletin 1­SECM-01 Rev.

6SE497 0006 Copyright © 2001 DETROIT DIESEL CORPORATION

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