Instructions For Using The Sub-Routine Tests

Sub-routines are the following checks which 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.

Observe the following instructions when performing sub-routines:

• DO NOT  measure voltage or resistance at MCU module, or connect test lamps to it (unless specific instructions say to do so).
• Disconnect both ends of a circuit when looking 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.