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

1. Entering and Exiting Diagnostic Test Mode
The diagnostic test mode is entered by shorting together the pins of the diagnostic connector located behind the right side kick panel.







The CTM returns to the normal mode when the pins of the diagnostic connector are no longer connected.

2. Operation
The diagnostic test mode is made up of the following:
^ Tone and Door Ajar Indicator Test mode.
^ Diagnostic Trouble Code (DTC) Output mode. Input Test mode.

The Tone and Door Ajar Indicator Test mode is run immediately upon entry into the diagnostic test mode. When this is complete, the key-in-ignition input is then used to switch between the Input Test mode and the DTC Output mode. When the key is not in the ignition switch, the DTC Output mode will be active. When the key is in the ignition switch, the Input Test will be active The Input Test mode and DTC Output mode can be switched indefinitely until the pins of the diagnostic connector are disconnected.

After the 3 second test, the CTM will pause for 1 second and then proceed to either the Input Test mode or DTC Output mode depending on the state of the key-in-ignition input