The typical diagnosis for this fault is voltage low.
108.3.1 Low Voltage Check
Check as follows:
1. Disconnect the Accelerator Pedal (AP) connector.
2. Disconnect the #1 connector of the CPC.
3. Measure the resistance between pin 1 and pin 3 of the AP connector.
[a] If the resistance is less than 5 Ω, repair the short between wires 8 and 4 of the CPC
#1 connector. Refer to section 108.3.1.1.
[b] If the resistance is greater than 5 Ω, go to step 4.
4. Measure the resistance between pin 2 and 3 of the AP connector.
[a] If the resistance is less than 5 Ω, repair the short between wires 7 and 14 of the CPC
#! connector. Refer to section 108.3.1.1.
[b] If the resistance is greater than 5 Ω, go to step 5.
5. Measure the resistance between pin 1 of the AP connector and ground.
[a] If the resistance is less than 5 Ω, repair the short circuit between pin 1 of the AP
connector and ground. Refer to section 108.3.1.1.
[b] If the resistance is greater than 5 Ω, go to step 6.
6. Measure the resistance between pin 2 of the AP connector and ground.
[a] If the resistance is less than 5 Ω, repair the short circuit between pin 2 of the AP
connector and ground. Refer to section 108.3.1.1.
[b] If the resistance is greater than 5 Ω, replace the Accelerator Pedal. Refer to section
108.3.1.1.
108.3.1.1 Verify Repairs
Verify repairs as follows:
1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.
4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps
illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel
Customer Support Center at 313–592–5800.
