SPN 1636/FMI 4
This diagnostic condition is typically intake manifold temperature circuit failed low.
Repair the short to ground between pin 2 of the Intake Manifold Temperature Sensor harness connector and pin 106 of the MCM 120–pin connector. Refer to “91.2.1 Verify Repairs” .
Verify Repairs
Verify repairs as follows:
- Turn ignition OFF.
- Reconnect any electrical connections that were disconnected to perform the diagnosis.
- Clear codes with DDDL 7.0 or latest version.
ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. - Start and bring engine up to operating temperature (over 140°F/60°C).
- Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes.
