Pinpoint Test A: The Sunshade is Inoperative

Sunshade

Pinpoint Test A: The Sunshade is Inoperative

Normal Operation

The sunshade module receives power from the accessory delay relay through circuit CBP41 (BU). The sunshade module is grounded through circuit GD149 (BK). The sunshade switch is grounded through circuit GD114 (BK/BU). The sunshade switch provides a momentary ground signal to the sunshade module, through circuit CPR88 (YE), to raise or lower the sunshade.

This pinpoint test is intended to diagnose the following:

- Sunshade module

- Sunshade motor

- Sunshade assembly

- Wiring, terminals or connectors

PINPOINT TEST A : THE SUNSHADE IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK FOR MECHANICAL BINDING

- Inspect for signs of bent or damaged components.

Were there signs of bent or damaged components?

Yes
INSTALL a new sunshade assembly. REFER to Sunshade . TEST the system for normal operation.

No
GO to A2.

A2 CHECK VOLTAGE TO SUNSHADE MOTOR

- Disconnect: Sunshade Module-to-Sunshade Motor Electrical Connector.

- Ignition ON.

- NOTE: Voltage may only be present for a short time after pressing the sunshade switch.
Activate the sunshade motor by pressing the sunshade switch. Measure the voltage between the sunshade module pig tail connector pins 1 and 2, module side.






Is the voltage greater than 10 volts?

Yes
INSTALL a new sunshade motor. REFER to Sunshade Motor . TEST the system for normal operation.

No
GO to A3.

A3 CHECK VOLTAGE TO THE SUNSHADE MODULE

- Measure the voltage between sunshade module C3340-7, circuit CBP41 (YE), harness side and ground.





Is voltage greater than 10 volts?

Yes
GO to A4.

No
REPAIR the circuit. TEST the system for normal operation.

A4 CHECK GROUND TO THE SUNSHADE MODULE

- Ignition OFF.

- Measure the resistance between sunshade module C3340-10, circuit GD149 (BK), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to A5.

No
REPAIR the circuit. TEST the system for normal operation.

A5 CHECK SUNSHADE SWITCH INPUT TO SUNSHADE MODULE

- While activating the sunshade switch, measure the resistance from sunshade module C3340-1, circuit CPR88 (YE), harness side to ground.





Is the resistance less than 5 ohms when the sunshade switch is activated; and greater than 10,000 ohms when the sunshade switch is at rest?

Yes
INSTALL a new sunshade module. REFER to Sunshade Module . TEST the system for normal operation.

No
GO to A6.

A6 CHECK CIRCUIT GD114 (BK/BU) FOR AN OPEN

- Disconnect: Sunshade Switch C3196.

- Measure the resistance from sunshade switch C3196-2, circuit GD114 (BK/BU), harness side to ground.





Is the resistance less than 5 ohms?

Yes
GO to A7.

No
REPAIR the circuit. TEST the system for normal operations.

A7 CHECK CIRCUIT CPR88 (YE) FOR AN OPEN OR SHORT TO GROUND

- Measure the resistance from sunshade switch C3196-6, circuit CPR88 (YE), harness side to sunshade module C3340-1, harness side, circuit CPR88 (YE).





Is the resistance is less than 5 ohms?

Yes
INSTALL a new sunshade switch. TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.