Chrysler Town, Dodge Caravan. Manual — part 753
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
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Rear Mode Door Driver (A) and (B) circuits.
Is the resistance above 100k ohms?
All
Yes
→ Go To 4
No
→ Repair the Rear Mode Door Driver (A) and (B) circuits for a short
together.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance of the Rear Mode Door Driver (A) circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the Rear Mode Door Driver (A) circuit for an open.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance of the Rear Mode Door Driver (B) circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Rear Mode Door Driver (B) circuit for an open.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Rear Mode Door Driver (A) and (B) circuits.
Is the resistance between 26.0 and 46.0 ohms?
All
Yes
→ Replace the ATC.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 7
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Rear Mode Door Actuator.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
251
AUTOMATIC TEMPERATURE CONTROL
REAR MODE DOOR NOT RESPONDING (ACTIVE) —
Continued
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