Chrysler Town, Dodge Caravan. Manual — part 747

TEST

ACTION

APPLICABILITY

5

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Measure the resistance between ground and the Sensor Return circuit.
Is the resistance below 10 ohms?

All

Yes

→ Go To 6

No

→ Go To 7

6

If there are no possible causes remaining, view repair.

All

Repair

Replace the ATC Remote Sensor.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

7

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Measure the resistance of the Sensor Return circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 8

No

→ Repair the Sensor Return circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

8

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.

9

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Turn the ignition on.
Measure the voltage of the KDB 2 Clock circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the KDB 2 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 10

10

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Measure the resistance between ground and the KDB 2 Clock circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 11

No

→ Repair the KDB 2 Clock circuit for a short to ground.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

224

AUTOMATIC TEMPERATURE CONTROL

FRONT IR SENSOR NOT CALIBRATED (ACTIVE) —

Continued

TEST

ACTION

APPLICABILITY

11

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Measure the resistance of the KDB 2 Clock circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 12

No

→ Repair the KDB 2 Clock circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

12

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.

13

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Measure the resistance between ground and the KDB 2 Data circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 14

No

→ Repair the KDB 2 Data circuit for a short to ground.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

14

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Measure the resistance of the KDB 2 Data circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 15

No

→ Repair the KDB 2 Data circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

15

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.

225

AUTOMATIC TEMPERATURE CONTROL

FRONT IR SENSOR NOT CALIBRATED (ACTIVE) —

Continued

TEST

ACTION

APPLICABILITY

16

Turn the ignition off.
Disconnect the ATC Remote Sensor harness connector.
Disconnect the ATC C3 harness connector.
Measure the resistance of the Protected Ignition circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the ATC.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Protected Ignition circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

226

AUTOMATIC TEMPERATURE CONTROL

FRONT IR SENSOR NOT CALIBRATED (ACTIVE) —

Continued

Symptom:

FRONT KEYBOARD COMMUNICATION FAULT (ACTIVE)

When Monitored and Set Condition:

FRONT KEYBOARD COMMUNICATION FAULT (ACTIVE)

When Monitored:

With the ignition on and the IOD fuse installed.

Set Condition:

This DTC will set if there is an internal fault in the ATC head.

POSSIBLE CAUSES

ATC

TEST

ACTION

APPLICABILITY

1

This DTC indicates a fault in the ATC.
View repair.

All

Repair

Replace the ATC.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

227

AUTOMATIC TEMPERATURE CONTROL