Test Point 14
Test point 14Sun sensor
Short to B+
Short to ground
Fault code 33
Diagnosis conditions
No control module fault stored.
No fault with supply voltage (5 volts).
Short to B+/ Short to ground
1. Remove sun sensor.
2. Remove plug connection from sun sensor.
3. Connect voltmeter on sleeve side to pin 2 (negative) and pin 3 (positive).
Switch on ignition.
Display: approx. 4.5 - 5 volts
If 0 volts is displayed, check wiring to the heating/air-conditioning control A 12 and B 18 for continuity.
Check wiring to the heating/air-conditioning control B 18 for short to ground.
Note
The wiring to the heating/air-conditioning unit is routed via two plug connections.
If the wiring is OK, replace the heating/air-conditioning control.
4. Connect ohmmeter to sun sensor pins 2 and 3.
Sun sensor not in darkness
Display: approx. 1.3 M Ohms
Sun sensor in darkness
Display: approx. 240 k Ohms