Initial Inspection and Diagnostic Overview

Principle of operation
For a detailed principle of operation,

Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. Check the vehicle battery condition and state of charge before condemning any of the charging system components.

Visual Inspection Chart

Mechanical Electrical
- Generator - Generator
- Drive belt - Battery
- Drive belt tensioner - Charging system warning light function (ignition ON, engine OFF)
- Generator pulley - Fuse 33 (5A) (passenger junction fuse box)
- Check the security of the generator fittings - Fuse 30 (10A) (Rear power distribution box) Vehicles with 3.5L or 4.2L engine
- Engine/generator ground connection
- Circuit(s)
- Electrical connector(s)
- Engine control module (ECM)

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
2. If the cause is not visually evident and the Jaguar approved diagnostic system is not available, use a scan tool to retrieve the fault codes before proceeding to the Symptom Chart.

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE:
- When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
- Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.