• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

For symptom byte information refer to Symptom Byte List

The keyless entry control module controls the retained accessory power relay through the control circuit by applying voltage to the interruptible retained accessory power relay coil control circuit. The retained accessory power relay is energized when the ignition is in the ACCESSORY or the ON position. The relay is also energized for approximately 10 min after shutting the ignition OFF, providing no door is opened.

• System voltage is greater than 6 V.
• The DTC can only set when the output is actively being requested by the module.

The ignition output is not active and a short to battery is detected 3 consecutive times on the ignition voltage circuit.

The ignition output is active and a short to ground is detected on the ignition voltage circuit.

The ignition output is active and an open or short to battery is detected on the ignition voltage circuit.

No action is taken.

The module output driver will be shut down and not supply voltage to the circuit.

• The current DTC will clear when the malfunction is no longer present and the ignition output is active.
• A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Power Moding Schematics

Master Electrical Component List

Retained Accessory Power Description and Operation

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Control Module References for scan tool information

1. Ignition ON.
2. Verify the KR76 Retained Accessory Power Relay clicks ON and OFF when cycling the ignition between ON and OFF.
• If the KR76 Retained Accessory Power Relay does not click ON and OFF

  Refer to Circuit/System Testing – Diagnostic A.

• If the KR76 Retained Accessory Power Relay clicks ON and OFF
3. All OK.

1. Ignition OFF/Vehicle OFF and all vehicle systems OFF, disconnect the KR76 Retained Accessory Power Relay. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 85 and ground.
• If 10 Ω or greater
1. Ignition OFF/Vehicle OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
• If 2 Ω or greater, repair the open/high resistance in the circuit.
• If less than 2 Ω, repair the open/high resistance in the ground connection.
• If less than 10 Ω
3. Ignition ON/Vehicle in Service Mode, connect a test lamp between the control circuit terminal 86 and ground circuit terminal 85.
4. Verify the test lamp turns ON and OFF when cycling the ignition between ON and OFF.
• If the test lamp is always OFF
1. Ignition OFF/Vehicle OFF, remove the test lamp, disconnect the harness connector at the K84 Keyless Entry Control Module.
2. Test for infinite resistance between the control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
• If 2 Ω or greater, repair the open/high resistance in the circuit.
• If less than 2 Ω, replace the K84 Keyless Entry Control Module.
• If the test lamp is always ON
1. Ignition OFF/Vehicle OFF, remove the test lamp, disconnect the harness connector at the K84 Keyless Entry Control Module, ignition ON/Vehicle in Service Mode.
2. Test for less than 1 V between the control circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K84 Keyless Entry Control Module.
• If the test lamp turns ON and OFF
5. Test or replace the KR76 Retained Accessory Power Relay.

Perform the Diagnostic Repair Verification after completing the repair.

• Electrical Relay Replacement
• Control Module References for control module replacement, programming and setup.