Troubleshooting Diagnostic Trouble Codes: Power Supply - BENDIX AutoVue FLC-20 Service Data

This connector is an Amphenol
[P/N HSD-NARP-PCB-12B]
(4-pin shielded connector).
Figure 9 – Camera and Harness Connector Views
Pin #
Table 3 – Harness Connector Pins
2.12 TROUBLESHOOTING DIAGNOSTIC
TROUBLE CODES: POWER SUPPLY
IGNITION VOLTAGE TOO LOW
Measure the ignition voltage under load. Ensure that the
ignition voltage is greater than 9 VDC (Volts DC). Check
the vehicle battery and associated components. Inspect
for damaged wiring, damaged or corroded connectors,
and loose connections. Check the condition of the fuse.
IGNITION VOLTAGE TOO HIGH
Measure the ignition voltage. Ensure that ignition voltage
is not greater than 16 VDC. Check the vehicle battery
and associated components. Inspect for damaged wiring,
damaged or corroded connectors, and loose connections.
CONNECTOR PIN-OUT &
POWER REQUIREMENTS
The camera has two connectors. See Figure 3.
Power Supply Pin Codes (4.5)
1 2 3
(Looking into the Back of the Harness Connector)
Description
1 Module Power
2 Not Used
3 J1939 Low
4 J1939 High
5 Not Used
6 Private Communications Low
7 Private Communications High
8 Ground GND (-)
9 Ignition Wake-Up
4 5 6 7 8 9
Nominal Voltage
14V/28V (9~32V)
—
5V
5V
—
5V
5V
0.000V
14V/28V (7~32V)
POWER SUPPLY TESTS
1. Take all measurements at the camera's harness
connector.
2. Place a load (e.g. 1157 stop lamp) across the supply
voltage and ground connection. Measure the voltage
with the load. The supply voltage on pin 1 to ground
should measure between 10 to 16 VDC (Volts DC).
3. Check for damaged wiring, damaged or corroded
connectors, and loose connections.
4. Check the condition of the vehicle battery and associ-
ated components. Ensure the connection to ground is
secure and tight.
5. Using the procedures described by the vehicle
manufacturer, check the alternator output for excessive
noise.
The rectangular connector is a
JST [P/N SM09B-HCHK-TB(LF)(SN) (9-pin)].
It mates with a JST harness connector
HCHFB-09-KE that uses female pins
JST [P/N SHCM-A03T-P025 (tin-plated)].
Nominal Current
200mA/100mA
—
85mA
85mA
—
85mA
85mA
200mA/100mA
20mA/10mA
15