F 150 2WD Pickup V6-4.2L VIN 2 (1997)
When the diagnostic test mode is first entered, the CTM will generate a tone and illuminate the door ajar indicator for 3 seconds if the ignition is in the
RUN/ACC or RUN position. Use the table to diagnose concerns with the warning chime and door ajar indicator.
Input Test Mode
The Input Test mode individually tests the Central Timer Module (CTM) inputs. It is entered from the Diagnostic Trouble Code (DTC) Output mode
when the operator puts the key in the ignition assembly. Inputs may be tested in any order. As an input is toggled on or off, the door ajar indicator (if the
ignition switch is in the RUN position) and tone outputs will be activated for 1 second for confirmation. At any time, if the key is removed from the
ignition switch, the DTC Output mode will be re-entered.
Note that all CTM functions remain disabled while in diagnostic test mode. The charts show all the possible inputs that can be tested for the CTM
Controlled Interior Lighting System.
NOTE: Several of the inputs will not operate unless the ignition is in the RUN position.
Central Timer Module Diagnostic Trouble Codes
The Central Timer Module (CTM)'s Diagnostic Trouble Codes (DTCs) are 2 digits in length and are output to the operator by the sounding of the
chime.
The first digit is output, followed by a one second pause, followed by the next digit. Each digit is made up of 1 to 9 one-second individual chime tones.
The illustration represents the output of the DTC 21.
Central Timer Module Diagnostic Test Mode
NOTE: Central Timer Module (CTM) diagnostics are not accessible with the New Generation Star (NGS) Tester.
The diagnostic test mode is used to test the Central Timer Module (CTM) while the CTM is in the vehicle. While in this mode, Diagnostic Trouble
Codes (DTCs) can be retrieved and cleared and CTM inputs can be individually tested.
NOTE: Normal CTM functions are disabled while in the diagnostic test mode
