Possible Fault Causes
1. Wiring harness and plug-in connections between GSAW21/56/56 and 3-way directional-control valve S1, 2. Internal transmission wiring harness from plug on transmission to 3-way directional-control valve S1, 3. Internal transmission wiring harness/3-way directional-control valve S1, 4. GSAW21/56/56,