DTC 2: Open Isolation Solenoid Circuit

WARNING: This page is about a different car, the 1995 Suzuki Sidekick. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition off. Disconnect RWAL ECM connector. Measure resistance between RWAL ECM harness connector terminal No. 1 and ground. See Fig 1.
If resistance reading is 3-6 ohms, check RWAL ECM connections. If connections are okay, replace RWAL ECM.
If resistance reading is more than 6 ohms, disconnect pressure limit valve connector. Measure resistance between pressure limit valve terminals No. 2 and 4. See Fig 2.
If resistance is now 3-6 ohms, repair open in harness Green or Black wire. If resistance is more than 6 ohms, isolation solenoid winding is open. Replace pressure limit valve.

Fig 1: Identifying RWAL ECM, Pressure Limit Valve & Power Relay Harness Connector Terminals

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Identifying Pressure Limit Valve & Related Terminals

Courtesy of SUZUKI OF AMERICA CORP.