Jeep Grand Cherokee WK. Manual — part 1664

11–MODE POT OPEN (MTC)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With ignition on.

•

Set Condition:
If the mode pot fails the internal self test.

Possible Causes

A/C HEATER CONTROL

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (MTC) for stored DTC test procedures.

Diagnostic Test

1.

REPLACE THE A/C HEATER CONTROL

Repair

Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

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HVAC - ELECTRICAL DIAGNOSTICS

WK

12–MODE POT SHORTED (MTC)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
If the mode pot fails the internal self test.

Possible Causes

A/C HEATER CONTROL

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (MTC) for stored DTC test procedures.

Diagnostic Test

1.

REPLACE THE A/C HEATER CONTROL

Repair

Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

WK

HVAC - ELECTRICAL DIAGNOSTICS

24 - 5

13–TEMP POT OPEN (MTC)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
If the temp pot fails the internal self test.

Possible Causes

A/C HEATER CONTROL

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (MTC) for stored DTC test procedures.

Diagnostic Test

1.

REPLACE THE A/C HEATER CONTROL

Repair

Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

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HVAC - ELECTRICAL DIAGNOSTICS

WK

14–TEMP POT SHORTED (MTC)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
If the temp pot fails the internal self test.

Possible Causes

A/C HEATER CONTROL

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (MTC) for stored DTC test procedures.

Diagnostic Test

1.

REPLACE THE A/C HEATER CONTROL

Repair

Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

WK

HVAC - ELECTRICAL DIAGNOSTICS

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