Instructions For Using Sub-Routine Tests

Sub-routines checks are performed to correct a service code. Be sure to perform check as instructed. After replacing components or repairing circuits, repeat "Functional Test" and check engine operation.

The following instructions and procedures must be observed when performing sub-routines:

• Do not measure voltage or resistance at MCU module, or connect test lamps to it (unless specifically instructed to do so.)
• Disconnect both ends of a circuit when testing for continuity or shorts. Be sure ignition is turned off.
• Disconnect solenoids and switches from harness before measuring resistance or continuity.
• When more than one service code is indicated, start service with the first code received.
• Use wiring diagrams to locate pin locations and connectors.