Description and Instructions

DESCRIPTION
The Output Test Mode (OTM) aids in servicing output actuators associated with the powertrain Control Module (PCM). It allows the technician to energize and de-energize most of the system output actuators on command. When entering OTM, the outputs can be turned Off and On without controlling the cooling fans. The low and high speed cooling fans may be turned On separately without energizing the other outputs.

SCAN TOOL IN ENHANCED DIAGNOSTIC MODE
A string of characters must be entered into the generic scan tool to perform Output Test Mode. The generic keystroke entry for this specific function is provided below. Also, refer to the scan tool manufacturer's instructions for additional information.

INSTRUCTIONS ON HOW TO PERFORM OUTPUT TEST MODE
Output Test Mode has four separate forms to enter:
ALL OUTPUTS ON (EXCEPT COOLING FANS)
ALL OUTPUTS OFF
LOW SPEED COOLING FAN ON/OFF
HIGH SPEED COOLING FAN ON/OFF

Refer to scan tool manufacturer's manual for specific information on which cables to use or how to manually enter character strings for the following examples.

- Perform the necessary safety precautions and visual inspection.

- Connect scan tool to DLC.

- Turn ignition key to the On position.

- Verify tool is connected and communicating properly by entering the OBD II System Readiness Test.

- Enter the strings separately and in the order shown:

OUTPUT TEST MODE:

ALL OUTPUTS ON:
02,20,20,C4 10 25,,9E 00 A1 91 00 03,16

03,22,20,C4 10 31 84,,9E 00 A1 91 00 04,AA

04,2A,20,C4 10 B1 00 25 02,,9E 00 41 4C 4C 20 4F 4E,36

ALL OUTPUTS OFF:
05,28,20,C4 10 32 84,,9E 00 41 4C 4C 20 4F 46 46,51

LOW SPEED FAN ON:
02,20,20,C4 10 25,,9E 00 A1 91 00 03,16

03,22,20,C4 10 31 84,,9E 00 A1 91 00 04,AA

04,2A,20,C4 10 B1 00 25 03,,9E 00 4C 46 43 20 4F 4E,33

LOW SPEED FAN OFF:
05,28,20,C4 10 32 84,,9E 00 41 4C 4C 20 4F 46 46,51

HIGH SPEED FAN ON:
02,20,20,C4 10 25,,9E 00 A1 91 00 03,16

03,22,20,C4 10 31 84,,9E 00 A1 91 00 04,AA

04,2A,20,C4 10 B1 00 25 04,,9E 00 48 46 43 20 4F 4E,2F

ALL HIGH SPEED FAN OFF:
05,28,20,C4 10 32 84,,9E 00 41 40 4C 20 4F 46 46,51

NORMALLY ON OUTPUTS OFF:
02,20,20,C4 10 25,,9E 00 A1 91 00 03,16

03,22,20,C4 10 31 84,,9E 00 A1 91 00 04,AA

04,2A,20,C4 10 B1 00 25 01,,9E 00 4F 2F 50 20 4F 46 46,6C

RETURN TO NORMAL STATE:
05,28,20,C4 10 32 84,,9E 00 41 4C 40 20 4F 46 46,51