Series 60 DDEC VI Troubleshooting – Section 87.4 SPN 1636/FMI 21

Section 87.4
SPN 1636/FMI 21

This diagnosis is typically intake manifold temperature drift (high box).‪

Section 87.4.1
Intake Manifold Sensor Check

Check as follows: ‪

1. Disconnect the Intake Manifold Temperature Sensor.
2. Inspect the Intake Manifold Temperature Sensor connector for bent, spread or corroded pins.
   1. If connector damage is found, repair as necessary. Refer to "87.4.1.1 Verify Repairs" .
   2. If no connector damage is found, replace the Intake Manifold Temperature Sensor. Refer to "87.4.1.1 Verify Repairs" .

Section 87.4.1.1
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.