1982 CHEVROLET CAMARO sensor

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 27
19. Install the instrument panel sound insulators.
20. Install the inst
rument panel pad.
21. Install the daytime running light sensor electrical connector, if equipped.
22. Install the screws attaching the in strument panel pad to the instrument
panel.
23. Install the center console.
24. Properly arm the SIR air bag syste m, if equipped. Disconnect the negative
battery cable.

DOOR PANELS
REMOVAL & INSTALLATION

Fig. 1: Armrest and pull handle

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 80
4. Remove the mounting bo
lts, if equipped with single piston caliper or the
circlip and pin, if equipped with dual piston ca liper. Inspect the bolts for
corrosion and replace as necessary.
5. Remove the caliper fr om the steering knuckle an d suspend it from the body
of the car with a length of wire. Do not allow the caliper to hang by its hose.
6. Remove the pad retaining springs and remove the pads from the caliper.
7. Remove the plastic sleeves and the rubber bushings from the mounting bolt
holes.
8. Obtain a pad replacem ent kit. Lubricate and install the new sleeves and
bushings with a light coat of silicone grease.
9. Install the retainer spring on the i nboard pad, if equipped with single piston
caliper.
A new spring should be included in the pad replacement kit.
10. Install the new inboard pad into the caliper with the wear sensor at the
leading end of the shoe duri ng forward wheel rotation.
11. Install the outboard pad into the caliper.
12. Use a large pair of slip joint plie rs to bend the outer pad ears down over the
caliper, if equipped with t he single piston caliper.
13. Install the calip er onto the steering knuckle. Tighten the mounting bolts to
21-35 ft. lbs. (28-47 Nm), if equipped. In stall the wheel and lower the car. Fill
the master cylinder to its proper le vel with a good quality brake fluid.
14. Pump the brake pedal slowly a nd firmly 3 times with the engine running
before attempting to move the vehicle; bleed the brakes as required.
BRAKE CALIPER

CAUTION - Some brake pads contain asbest os, which has been determined to
be a cancer causing agent. Never clean the brake surfaces with compressed
air! Avoid inhaling any dust from any brake surface! When cleaning brake
surfaces, use a commercially available brake cleaning fluid.

REMOVAL & INSTALATION

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 110
4. Position the brake pads
into the caliper. Lubricate and install new bushings,
sleeves and check valve.
5. When installing the inner brake pad, make sure that the D-shaped tab of the
pad engages with the D-shaped notch of the piston, as illustrated.
6. Upon installation of the inner pad, make sure that the wear sensor of the pad
is at the leading edge of the shoe during forward wheel rotation. Slide the
metal edge of the pad under the ends of the dampening spring and snap the
pad into position against the piston.
7. Install the outer pad and caliper. Afte r installing the caliper, apply the brakes,
then bend the ears of the out er pad against the caliper and ensure that there
is no excessive clearance.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 112
4. Position a C-clamp a
nd tighten until the piston bottoms in the base of the
caliper housing. Make sure 1 end of the C-clamp rests on the inlet fitting bolt
and the other against the outboard disc brake pad.
It is not necessary to remove the parki ng brake caliper lever return spring to
replace the disc brake pads.
5. Remove the upper caliper guide pin bolt and discard.
6. Rotate the caliper housing. Be careful not to strain the hose or cable conduit.
7. Remove the disc brake pads.
To install:
8. Clean all residue from the pad guide surfaces on the mounting bracket and
caliper housing. Inspect the guide pins for free movement in the mounting
bracket. Replace the guide pins or boot s, if they are corroded or damaged.
9. Install the disc brake pads. The out board pad with insulator is installed
toward the caliper housing. The inboard pad with the w ear sensor is installed
nearest the caliper piston. The wear sens or must be in the trailing position
with forward wheel rotation.
10. Rotate the caliper housing into it 's operating position. The springs on the
outboard brake pad must not stick through the inspection hole in the caliper
housing. If the springs are sticking thr ough the inspection hole in the caliper
housing, lift the caliper housing and make the necessary corrections to the
outboard brake pad positions.
11. Install a new upper cali per guide pin bolt and tight en to 26 ft. lbs. (35 Nm).
Tighten the lower caliper guide pin bolt to 16 ft. lbs. (22 Nm).
12. With the engine runni ng, pump the brake pedal slo wly and firmly to seat the
brake pads.
13. Check the caliper parking brake levers to make sure they are against the
stops on the caliper housing. If the leve rs are not on their stops, check the
parking brake adjustment.
14. Remove the 2 wheel nuts from t he rotor and install the wheel and tire
assembly.
15. Lower the vehicle, che ck the master cylinder fluid level and road test the
vehicle.
BRAKE CALIPER
REMOVAL & INSTALLATION
CAUTION - Brake pads contain asbestos, which has been determined to be a
cancer causing agent. Never clean the brake surfaces with compressed air!
Avoid inhaling any dust from any brake surface! When cleaning brake surfaces,
use a commercially available brake cleaning fluid.
1982-88 MODELS

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 128
•

Size - the larger the wire size being used, the less resistance the wire will
have. This is why components which use large amounts of electricity
usually have large wires suppl ying current to them.
• Length - for a given thickness of wire, the longer the wire, the greater the
resistance. The shorter the wire, the less the resistance. When
determining the proper wire for a circ uit, both size and length must be
considered to design a circuit that can handle the current needs of the
component.
• Temperature - with many materials, the higher the temperature, the
greater the resistance (positive temper ature coefficient). Some materials
exhibit the opposite trait of lower re sistance with higher temperatures
(negative temperature coefficient). Thes e principles are used in many of
the sensors on the engine.
OHM'S LAW
There is a direct relationship between current, voltage and resistance. The
relationship between current, voltage and resistance can be summed up by a
statement known as Ohm's law.
Voltage (E) is equal to amper age (I) times resistance (R): E=I x ROther forms of
the formula are R=E/I and I=E/R
In each of these formulas, E is the voltage in volts, I is the current in amps and
R is the resistance in ohms. The basic point to remember is that as the
resistance of a circuit goes up, the amount of current that flows in the circuit will
go down, if voltage remains the same.
The amount of work that the electricity can perform is expressed as power. The
unit of power is the watt (w). The re lationship between power, voltage and
current is expressed as:
Power (w) is equal to amperage (I) times voltage (E): W=I x EThis is only true
for direct current (DC) circuits; The alte rnating current formula is a tad different,
but since the electrical circuits in mo st vehicles are DC type, we need not get
into AC circuit theory.
ELECTRICAL COMPONENTS
POWER SOURCE
Power is supplied to the vehicle by tw o devices: The battery and the alternator.
The battery supplies electrical power dur ing starting or during periods when the
current demand of the vehicle's electrical system exceeds the output capacity of
the alternator. The alternator supplies electrical current when the engine is
running. Just not does the al ternator supply the current needs of the vehicle, but
it recharges the battery.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 136
accidental grounding. It is al
so advisable to include a standard automotive fuse
in any jumper wire. This is commonly referred to as a "fused jumper". By
inserting an in-line fuse holder between a set of test leads, a fused jumper wire
can be used for bypassing open circuits. Use a 5 amp fuse to provide protection
against voltage spikes.
Jumper wires are used primarily to locate open electrical circuits, on either the
ground (—) side of the circuit or on the power (+) side. If an electrical
component fails to operate, connect t he jumper wire between the component
and a good ground. If the component operates only with the jumper installed,
the ground circuit is open. If the ground circuit is good, but the component does
not operate, the circuit between the power feed and component may be open.
By moving the jumper wire successively back from the component toward the
power source, you can isolate the area of the circuit where the open is located.
When the component stops func tioning, or the power is cut off, the open is in
the segment of wire between the jumper and the point previously tested.
You can sometimes connect the jumper wir e directly from the battery to the
"hot" terminal of the component, but firs t make sure the component uses 12
volts in operation. Some electrical components, such as fuel injectors or
sensors, are designed to operate on about 4 to 5 volts, and running 12 volts
directly to these components will cause damage.
TEST LIGHTS

Fig. 1: A 12 volt test light is used to detect the presence of voltage in a circuit
The test light is used to check circuits and components while electrical current is
flowing through them. It is used for volt age and ground tests. To use a 12 volt
test light, connect the ground clip to a good ground and probe wherever
necessary with the pick. The test light will illuminate when voltage is detected.
This does not necessarily mean that 12 volts (or any particular amount of

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 142
When current flows through
a load, the voltage beyond the load drops. This
voltage drop is due to the resistance created by the load and also by small
resistances created by corrosion at the connectors and damaged insulation on
the wires. The maximum allo wable voltage drop under load is critical, especially
if there is more than one load in t he circuit, since all voltage drops are
cumulative.
1. Set the voltmeter selector s witch to the 20 volt position.
2. Connect the multimeter negative lead to a good ground.
3. Operate the circuit a nd check the voltage prior to the first component
(load).
4. There should be little or no voltage drop in the circuit prior to the fi\
rst component. If a voltage drop exists, the wire or connectors in the circuit
are suspect.
5. While operating the first component in the circuit, probe the ground side
of the component with the positive meter lead and observe the voltage
readings. A small voltage drop should be noticed. This voltage drop is
caused by the resistance of the component.
6. Repeat the test for each component (load) down the circuit.
7. If a large voltage drop is noticed, the preceding component, wire or
connector is suspect.
RESISTANCE

Fig. 3: Checking the resistance of a coolant temperature sensor with an
ohmmeter. Reading is 1.04 kilohms

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 147
SYSTEM OPERATION
The main portions of the SIR system
are the deployment loops and the
Diagnostic Energy Reserve Module (D ERM). The main function of the
deployment loops is to supply current through the inflator module(s), which will
cause deployment of the air bag(s) in t he event of a frontal crash of sufficient
force. The arming sensor, SIR coil assembly (driver side only), passen\
ger
inflator module jumper (passenger side only), inflator module(s), passenger
compartment discriminating sensor and fo rward discriminating sensor make up
the deployment loops.
The DERM has two functions. One to supply the deployment loops with a 36
volt reserve to ensure sufficient energy is available to deploy the airbag(s) if the
battery voltage feed to the arming sensor is lost during a frontal crash. Another
function is SIR electrical system diagnostics.
The arming sensor switches power to th e inflator module(s) on the high side
(power side) of the deployment loops. Ei ther of the discriminating sensors can
supply ground to the inflator module(s) on the low side (ground side) of the loop.
The inflator module(s) ar e only supplied sufficient cu rrent to deploy when the
arming sensor and at least one of the two discriminating sensors are closed
simultaneously.
SYSTEM COMPONENTS
DIAGNOSTIC ENERGY RESERVE MODULE
The DERM is designed to perform the following functions in the SIR system:
• Energy Reserve - Maintains 36 volt energy reserve(s) to provide
deployment energy when the vehicle volt age is low or lost in a frontal
impact
• Malfunction Detection - Performs diagnostic monitoring of the SIR
system electrical components
• Malfunction Recording - Provides diagnostic trouble code information
• Frontal Crash Recording - Record s the SIR system status during a
frontal crash
WARNING LAMP
The "INFL REST" or "AIR BAG" warning lamp is used to do the following:
• Verify lamp and DERM oper ation by flashing seven to nine times when
the ignition key is first turned ON
• Warn the driver of SIR electrical system faults which could potentially
affect the operation of the SIR system
• Provide diagnostic information by fl ashing the fault codes when the
diagnostic mode is enabled