Test Point 1

TEST POINT 1
Data Lead, Air Conditioner - PCm
Open Circuit / Short To Ground
Short To B+
Signal Disturbance

Fault Code 20

Open Circuit/Short to Ground

1. Pull off plug II on the display and operator control unit.

2. Pull off plug C on the heater / A/C control unit.

3. Check lead trom plug II, pin 15 to plug C-12 for continuity and short to ground.

Note:
The lead is routed via the 10-pole plug connection on the heater/ A/C unit.

Short to B+

1. Pull off plug II on the display and operator control unit.

2. Pull off plug C on the heater / A/C control unit.

3. Check lead from plug II, pin 15 to plug C-12 for short to B+.

Signal Disturbance

- Check wiring harness for short with other leads.