Page 586 of 4284
TEST ACTION APPLICABILITY
2 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between the 5 Volt Supply circuit and the Rear Temperature
Return circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 3
No®Repair the 5 Volt Supply circuit for a short to the Rear Temper-
ature Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between ground and the 5 Volt Supply circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 4
No®Repair the 5 Volt Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between ground and the Rear Temperature Feedback Signal
circuit.
Is the resistance above 10K ohms?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Rear Temperature Feedback Signal circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between the 5 Volt Supply circuit and the Rear Temperature
Feedback Signal circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 6
No®Repair the 5 Volt Supply circuit for a short to the Rear Temper-
ature Feedback Signal circuit.
Perform BODY VERIFICATION TEST - VER 1.
557
HEATING & A/C
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C ÐContinued
Page 587 of 4284
TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the 5 Volt Supply circuit and ground.
Is there any voltage present?All
Ye s®Repair the 5 Volt Supply circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 7
7 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the Rear Temperature Feedback Signal circuit and
ground.
Is there any voltage present?All
Ye s®Repair the Rear Temperature Feedback Signal circuit for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 8
8 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between the Rear Temperature Feedback Signal circuit and
the Rear Temperature Return circuit.
Is the resistance above 10K ohms?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Rear Temperature Feedback Signal circuit for a short
to the Rear Temperature Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
558
HEATING & A/C
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C ÐContinued
Page 588 of 4284
Symptom:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the A/C - Heater Control Module is unable to send a
message.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
ADDITIONAL CODE(S) PRESENT
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM, BCM, AND FCM
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the HVAC Module.
Was the DRBIIItable to I/D or communicate with the HVAC Module?All
Ye s®Go To 2
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any additional HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the PCM/ECM.
With the DRBIIIt, attempt to communicate with the BCM.
With the DRBIIIt, attempt to communicate with the FCM.
Was the DRBIIItable to I/D or communicate with the PCM/ECM, BCM and FCM?All
Ye s®Go To 4
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
559
HEATING & A/C
Page 589 of 4284
TEST ACTION APPLICABILITY
4 Turn the ignition on.
With the DRBIIIt, erase HVAC DTCs.
Cycle the ignition switch and wait approximately 1 minute.
With the DRBIIIt, read HVAC DTC's.
Did this DTC reset?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
560
HEATING & A/C
TX FAILURE (ACTIVE) - MANUAL A/C ÐContinued
Page 1025 of 4284
8.2 BODY CONTROL MODULE
8.3 ENGINE CONTROL MODULE
8.4 HEATING & A/C
8.4.1 ACTUATORS ± FRONT LHD
C
O
M
P
O
N
E
N
T
L
O
C
A
T
I
O
N
S
996
COMPONENT LOCATIONS
Page 1027 of 4284
8.4.4 ACTUATOR ± FRONT RHD
8.4.5 EVAPORATOR TEMPERATURE SENSOR LHD
C
O
M
P
O
N
E
N
T
L
O
C
A
T
I
O
N
S
998
COMPONENT LOCATIONS
8.4 HEATING & A/C (Continued)
Page 1029 of 4284
8.4.8 ACTUATORS ± REAR
8.4.9 REAR A/C HEATER UNIT CONNECTOR
C
O
M
P
O
N
E
N
T
L
O
C
A
T
I
O
N
S
1000
COMPONENT LOCATIONS
8.4 HEATING & A/C (Continued)
Page 1175 of 4284
TEST ACTION APPLICABILITY
3 With the DRBIIIt, read DTCs.
Did the DTC reoccur?All
Ye s®Replace the Wheel Speed Sensor in accordance with the Service
Information.
Perform ABS VERIFICATION TEST - VER 1.
No®Go To 4
4 Turn the ignition off.
Visually inspect wheel speed sensor.
Visually inspect tone wheel.
Visually inspect wiring harness.
Visually inspect brakes for locking up due to lining contamination or overheating.
Inspect all Components for defects which may cause a Signal DTC to set.
Is any Component Damaged?All
Ye s®Repair as necessary. The vehicle must be driven at 25 km/h (15
mph) to extinguish the ABS indicator.
Perform ABS VERIFICATION TEST - VER 1.
No®Test Complete.
18
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SIGNAL FAILURE ÐContinued
