Chrysler Voyager. Manual — part 205

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Turn the ignition on.
Measure the voltage of the KDB Data circuit.
Is the voltage above 10.0 volts?

All

Yes

→ Go To 4

No

→ Go To 11

4

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Turn the ignition on.
Measure the voltage of the KDB Data circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the KDB Data circuit for a short to voltage.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
Select Lab Scope.
Select Live.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the arrows to set the voltage range to 20 volts, the Offset to 4.0, and
the Probe to x10. Press F2 again and set the divisions to 40ms/Div, then press F2
again when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the KDB Clock
circuit in the Rear Automatic Temperature Control Switch harness connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
NOTE: The lab scope pattern should look similar to the example given in the
support material and cycle from approximately 0 volts to 8.0 volts.
Did the lab scope pattern and voltage react as noted above?

All

Yes

→ Go To 6

No

→ Go To 7

6

If there are no possible causes remaining, view repair.

All

Repair

Replace the Rear Automatic Temperature Control Switch.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

247

AUTOMATIC TEMPERATURE CONTROL

REAR KEYBOARD FAULT (ACTIVE) —

Continued

TEST

ACTION

APPLICABILITY

7

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Turn the ignition on.
Measure the voltage of the KDB Clock circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the KDB Clock circuit for a short to voltage.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 8

8

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance between ground and the KDB Clock circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 9

No

→ Repair the KDB Clock circuit for a short to ground.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

9

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance of the KDB Clock circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 10

No

→ Repair the KDB Clock circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

10

If there are no possible causes remaining, view repair.

All

Repair

Replace the ATC.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

11

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance between ground and the KDB Data circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 12

No

→ Repair the KDB Data circuit for a short to ground.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

248

AUTOMATIC TEMPERATURE CONTROL

REAR KEYBOARD FAULT (ACTIVE) —

Continued

TEST

ACTION

APPLICABILITY

12

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance of the KDB Data circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 13

No

→ Repair the KDB Data circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

13

If there are no possible causes remaining, view repair.

All

Repair

Replace the ATC.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

14

Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Ignition Switch (Run) circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the BCM.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Ignition Switch (Run) circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

249

AUTOMATIC TEMPERATURE CONTROL

REAR KEYBOARD FAULT (ACTIVE) —

Continued

Symptom:

REAR MODE DOOR NOT RESPONDING (ACTIVE)

When Monitored and Set Condition:

REAR MODE DOOR NOT RESPONDING (ACTIVE)

When Monitored:

With the ignition on and the IOD fuse installed.

Set Condition:

This DTC is set if the ATC does not receive feedback pulses within 5

seconds of the drive voltage being applied.

POSSIBLE CAUSES

REAR MODE DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND

REAR MODE DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND

REAR MODE DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER

REAR MODE DOOR DRIVER CIRCUIT (A) OPEN

REAR MODE DOOR DRIVER CIRCUIT (B) OPEN

ATC

REAR MODE DOOR ACTUATOR

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Rear Mode Door Driver (A) circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 2

No

→ Repair the Rear Mode Door Driver (A) circuit for a short to

ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Rear Mode Door Driver (B) circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 3

No

→ Repair the Rear Mode Door Driver (B) circuit for a short to

ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

250

AUTOMATIC TEMPERATURE CONTROL