Circuit/System Testing

NOTE: Test numbers refer to numbers on diagnostic chart.

Ensures PCM is capable of controlling solenoid.
Checks TCC PWM driver circuit for short to ground.

Fig 1: Code P1860 Schematic (3.8L) TCC PWM Solenoid

G95J13903

Fig 2: Code P1860 Diagnostic Flow Chart (3.8L) TCC PWM Solenoid

G95I13902