Dodge Heated 3500 2005, Heated 2500 2005, Heated 1500 2005 Service Manual

DR/DH HEATED SYSTEMS 8G - 1

HEATED SYSTEMS

TABLE OF CONTENTS

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HEATED GLASS - ELECTRICAL DIAGNOSTICS ... 1

HEATED GLASS - SERVICE INFORMATION ...... 6

HEATED MIRRORS - SERVICE INFORMATION .. 13

HEATED SEATS - SERVICE INFORMATION ..... 17

HEATED GLASS - ELECTRICAL DIAGNOSTICS

TABLE OF CONTENTS

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HEATED GLASS - ELECTRICAL DIAGNOSTICS

DIAGNOSIS AND TESTING

DEFOG RELAY CONTROL CKT SHORTED

TOBATT.............................2

HEATED GLASS - ELECTRICAL DIAGNOSTICS

DIAGNOSIS AND TESTING

SCHEMATICS AND DIAGRAMS .............5

8G - 2 HEATED GLASS - ELECTRICAL DIAGNOSTICS DR/DH

DEFOG RELAY CONTROL CKT SHORTED TO BATT

DR/DH HEATED GLASS - ELECTRICAL DIAGNOSTICS 8G - 3

DEFOG RELAY CONTROL CKT SHORTED TO BATT (CONTINUED)

For the Heated Mirror/Rear Defogger circuit diagram (Refer to 8 - ELECTRICAL/HEATED GLASS - SCHEMATICS AND DIAGRAMS) .

For a complete wiring diagram Refer to Section 8W.

• When Monitored:

With the Ignition on and the EBL (Rear Defogger) switch depressed.

• Set Condition:

This DTC will set if the A/C Heater Control senses excessive current on the (C110) Defogger Relay Control circuit.

Possible Causes

HVAC DTCS RELAY SHORTED (C110) DEFOGGER RELAY CONTROL CIRCUIT SHORTED TO BATTERY A/C HEATER CONTROL SHORTED TO BATTERY INTEGRATED POWER MODULE

Diagnostic Test

CHECK FOR HVAC DTC’S

Turn the ignition on. With the DRBIIIT, record and erase DTCs. Depress the EBL Switch on the A/C Heater Control. With the DRBIIIT, read the active DTCs.

Does the DRBIIIT display DEFOG RELAY CONTROL CKT SHORTED TO BATT?

Yes >> No >>

CHECK THE RELAY FOR A SHORT TO BATTERY

Turn the ignition off. One at a time remove and install a known good relay in place of the Heated Mirror Relay and then the EBL relay

if equipped.

NOTE: Do the following steps for each relay.

Turn the ignition on. With the DRBIIIT, record and erase DTCs. Depress the EBL Switch on the A/C Heater Control. With the DRBIIIT, read the active DTCs.

Go To 2 Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Refer to any Hotline

letters or Technical Service Bulletins that may apply. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).

Does the DRBIIIT display DEFOG RELAY CONTROL CKT SHORTED TO BATT?

Yes >> No >>

Go To 3 Replace the Relay that set the DTC.

Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).

8G - 4 HEATED GLASS - ELECTRICAL DIAGNOSTICS DR/DH

DEFOG RELAY CONTROL CKT SHORTED TO BATT (CONTINUED)

CHECK FOR A SHORTED A/C HEATER CONTROL

Turn the ignition off. Remove the Heated Mirror Relay and the EBL relay if equipped from

the Integrated Power Module. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C110) Defogger Relay Control circuit at

the A/C Heater Control C1 harness connector.

Is there any voltage present?

Yes >> No >>

CHECK THE (C110) DEFOGGER RELAY CONTROL CIRCUIT FOR A SHORT TO BATTERY

Turn the ignition off. Disconnect the Integrated Power Module C5 harness connector. Turn the ignition on. Measure the voltage of the (C110) Defogger Relay Control circuit at

the A/C Heater Control C1 harness connector.

Is there any voltage present?

Yes >>

No >>

Go To 4 Replace the A/C Heater Control in accordance with the

Service Information. Perform BODY VERIFICATION TEST - VER 1. (Refer to

BODY VERIFICATION TEST - VER 1).

Repair the (C110) Defogger Relay Control circuit for a short to battery.

Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).

Replace the Integrated Power Module in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).

DR/DH HEATED GLASS - ELECTRICAL DIAGNOSTICS 8G - 5

SCHEMATICS AND DIAGRAMS

HEATED GLASS SYSTEM

8G - 6 HEATED GLASS - SERVICE INFORMATION DR/DH

HEATED GLASS - SERVICE INFORMATION

TABLE OF CONTENTS

page page

HEATED GLASS - SERVICE INFORMATION

DESCRIPTION ..........................6

OPERATION ............................7

DIAGNOSIS AND TESTING

ELECTRIC BACKLIGHT (EBL) AND HEATED

MIRROR SYSTEM ......................7

SWITCH-REAR WINDOW DEFOGGER

DESCRIPTION ..........................9

OPERATION ............................9

RELAY-REAR WINDOW DEFOGGER

DESCRIPTION .........................10

OPERATION ...........................10

REMOVAL .............................11

INSTALLATION .........................11

GRID-REAR WINDOW DEFOGGER

STANDARD PROCEDURE

GRID LINE AND TERMINAL REPAIR .......12

HEATED GLASS - SERVICE INFORMATION

DESCRIPTION

CAUTION: Grid lines can be damaged or scraped off with sharp instruments. Care should be taken in cleaning glass or removing foreign materials, decals or stickers. Normal glass cleaning solvents or hot water used with rags or toweling is recommended.

The rear window defogger system, also known as electric backlight (EBL), consists of two vertical bus bars (1) linked by a series of grid lines (2) fired onto the inside surface of the rear window (3).

The EBL system is turned On or Off by a switch and a timing circuit integral to the A/C-heater control located at the center of the instrument panel.

Circuit protection is provided by two cartridge fuses located in the integrated power module (IPM). One fuse is for the control circuit and the other fuse is for the heated grid circuit.

DR/DH HEATED GLASS - SERVICE INFORMATION 8G - 7

OPERATION

The electric backlight (EBL) system is controlled by a momentary switch (1) located in the A/C-heater control (2) on the instrument panel. When the rear window defogger switch is pressed to the On position, the A/C-heater control energizes the rear window defogger (EBL) relay and the heated mirror relay, which then directs battery current to the rear defogger grid lines and to the heated side view mirrors. The grid lines heat the glass to help clear the rear window and side mirror surfaces of fog or frost.

An amber indicator (3) in the rear window defogger switch will illuminate to indicate when the EBL system is turned on. The A/C-heater control contains the EBL system control circuitry including the timer logic.

NOTE: The EBL system turns off automatically after approximately ten minutes of operation.

The EBL system will be automatically turned off after a programmed time interval of about ten minutes each time the rear window defogger switch is pressed. The EBL system will automatically shut off if the ignition switch is turned to the Off position, or it can be turned off manually by pressing the rear window defogger switch a second time.

Repair of the rear window defogger grid lines, bus bars, terminals or pigtail wires can be accomplished using the Mopar Rear Window Defogger Repair Kit (Part Number 04549275) or equivalent (Refer to 8 - ELECTRICAL/ HEATED GLASS/REAR WINDOW DEFOGGER GRID - STANDARD PROCEDURE - GRID LINE AND TERMINAL REPAIR).

DIAGNOSIS AND TESTING ELECTRIC BACKLIGHT (EBL) AND HEATED MIRROR SYSTEM

NOTE: Illumination of the defogger switch indicator lamp does not necessary mean that electrical current is reaching the rear window glass and/or the outside rear view mirror heating grids.

NOTE: For circuit descriptions and diagrams of the rear window defogger (EBL) and heated mirror systems, refer to 8W - WIRING DIAGRAM INFORMATION.

Operation of the electrical backlight (EBL) and heated mirror systems can be confirmed by the following:

8G - 8 HEATED GLASS - SERVICE INFORMATION DR/DH

1. Use a scan tool and check for diagnostic trouble codes (DTCs) related to the A/C-heater control. If no DTCs are found, go to Step 2. If any DTCs are found, repair as required, then proceed to Step 2

2. Turn the ignition switch to the On position. Set the rear window defogger switch in the On position. The rear window defogger and heated outside rear view mirror operation can be checked by feeling the glass surfaces of the rear window or outside rear view mirrors. A distinct difference in temperature between the grid lines (1) and the adjacent clear glass (2) or the mirror glass should be detected within three to four minutes of operation.

3. If a rear window glass temperature difference is not detected, use a 12-volt DC voltmeter (4) and contact the rear glass heating grid power feed terminal A (3) with the positive lead, and the ground terminal B (5) with the negative lead. The voltmeter should read battery voltage. If the voltmeter does not read battery voltage, check the following:

• Confirm that the ignition switch is in the On position.

• Make sure that the rear glass heating grid feed wire and ground wire are connected to the terminals. Confirm

that the ground wire has continuity to ground.

• Check the EBL relay and fuses located in the integrated power module (IPM) in the engine compartment. The relay and fuses must be tight in their receptacles and all electrical connections must be secure. Refer to the appropriate wiring information for diagnosis and testing of the ISO-standard relay.

When the above steps have been completed and the rear glass heating grid is still inoperative, one or more of the following is faulty:

• Rear window defogger switch in the A/C-heater control.

• Rear window defogger grid lines (all grid lines would have to be broken, or the power feed or the ground wire

disconnected, for the entire heating grid to be inoperative).

4. If a heated outside rear view mirror glass temperature difference is not detected, use a 12-volt DC voltmeter (4) and contact the rear view mirror glass heating grid power feed terminal 1 with the positive lead, and the ground terminal 5 with the negative lead. The voltmeter should read battery voltage. If the voltmeter does not read battery voltage, check the following:

• Confirm that the ignition switch is in the On position.

• Make sure that the rear view mirror glass heating grid feed wire and ground wire are fully connected to the

terminals. Confirm that the ground wire has continuity to ground.

• Check the heated mirror relay and fuse located in the integrated power module (IPM) in the engine compartment. The relay and fuse must be tight in their receptacles and all electrical connections must be secure. Refer to the appropriate wiring information for diagnosis and testing of the ISO-standard relay.

When the above steps have been completed and the rear view mirror glass heating grid is still inoperative, one or more of the following is faulty:

• Rear window defogger switch in the A/C-heater control.

• Rear view mirror grids (both the left and right mirror grids would have to had to fail or the power feed or the

ground wire disconnected, for the both mirror grids to be inoperative).

5. If the operation of the EBL system and/or the heated mirror system has been verified but the defogger LED indicator does not illuminate, replace the A/C-heater control (Refer to 24 - HEATING & AIR CONDITIONING/ CONTROLS/A/C HEATER CONTROL - REMOVAL).

DR/DH HEATED GLASS - SERVICE INFORMATION 8G - 9

SWITCH-REAR WINDOW DEFOGGER

DESCRIPTION

The switch for the rear window defogger (EBL) system (1) is integrated into the A/C-heater control (2), which is located in the center of the instrument panel. When the rear window defogger switch is activated, the timing circuit integral to the A/C-heater control operates the rear window defogger (EBL) relay and the heated mirror relay.

When the relays are activated, current is directed to the rear window defogger and the outside rear view mirror grids. The grids heat the rear window and rear wiew mirror glass to help clear the surfaces of fog or frost.

OPERATION

An LED indicator will illuminate when the rear window defogger switch is activated. When the switch is activated, it energizes the timing circuit integral to the A/C-heater control, which then activates the rear window defogger (EBL) relay and the heated mirror relay. The EBL relay controls the current flow to the grids of the rear window defogger.

The EBL system will be on for approximately ten minutes or until the rear window defogger switch or the ignition switch is turned off.

The rear window defogger switch and the rear window defogger LED indicator cannot be repaired and, if faulty or damaged, the A/C-heater control must be replaced (Refer to 24 - HEATING & AIR CONDITIONING/CONTROLS/ CONTROL-A/C HEATER - REMOVAL).

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