Body Control Modules: Other Chevrolet Tracker II

PCM REPROGRAMMING

After replacing PCM or if program needs to be updated, refer to latest Techline(R) information on PCM reprogramming. PCM can only be programmed using pass-through programming method. Pass-through programming method requires use of a scan tool in series with Techline(R) terminal and Data Link Connector (DLC).

TRANSMITTER PROGRAMMING

Note. Vehicle can be programmed for up to 4 transmitters. If the number of transmitters programmed exceeds 4, previously programmed transmitters will be erased, starting with first transmitter. All transmitters to be used must be programmed in same programming sequence.

1. Using a fused jumper wire (5-amp), connect Data Link Connector (DLC) terminals No. 4 (Black wire) and No. 8 (Pink/White wire). (Scheme 8) Door locks will cycle once to indicate entering programming mode.
2. Within one minute, repeatedly press lock and unlock buttons on transmitter simultaneously until door locks cycle once.
3. Within 30 seconds, repeat step 2 for each additional transmitter to be programmed.
4. Disconnect fused jumper wire from DLC, to exit programming mode.

Scheme 8

Intermittent Simulation

Use the following methods to reproduce conditions causing intermittent problem(s)

1. Apply light vibration to components.
2. Apply small amount of heat to component.
3. Wiggle or bend wiring harness.
4. Remove/apply vacuum supply source.

Monitor circuit/component voltage or resistance while attempting to simulate intermittent. If vehicle is running, monitor for DTCs. Use test results to identify problem component or circuit.

Possible Causes & Corrections

Use the following procedures to determine possible causes of intermittent MIL operation

1. Check for poor mating of one connector to another. Terminals may not be fully seated. Check for improperly formed or damaged terminals. Check wire-to-terminal connections.
2. Check for poor connection from ignition coil to ground or arcing at spark plug wires or plugs.
3. Check for poor connections in PCM ground terminals.
4. Check for electrical system interference caused by defective relay, PCM-driven solenoid or switch, which may cause sharp electrical surge. This type of problem will normally occur when problem component is operated.
5. Check for aftermarket parts which may not have been produced to manufacturer's specifications. Solenoids without original equipment diodes for circuit protection or voltage regulator using transistors instead of silicone-chip circuitry may cause voltage surges (up to 300 volts) in PCM wiring, causing temporary PCM shutdown. PCM shutdown is a normal response to system over voltage (over 16 volts on most models). PCM re-powers when condition ceases to exist. A rapid shutdown and re-power could cause a flickering MIL with no DTCs set in memory.
6. Check for improper installation of electrical accessories such as auxiliary lights or 2-way radios.
7. Ensure ground wire from PCM to distributor or ignition module is connected to a good ground.
8. Check for intermittent short to ground on data circuits of DLC or in MIL circuit. See DATA LINK CONNECTORS article in WIRING DIAGRAMS.
9. On vehicles not equipped with a driver information center, use scan tool to check for intermittent wiring problem. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Warm-up Cycles

If problem that caused DTC to set is repaired, PCM will begin to count warm-up cycles. After 40 consecutive warm-up cycles with no further problems, PCM will automatically clear DTC from memory.

Code Enable Criteria

Note. The following conditions must be met in order for this code to be stored.

1. Voltage supplied to module is in normal operating range (9-16 volts).

SYSTEM TESTS

Note. System tests were written specifically for use with Tech II scan tool. Other generic scan tools can be used, but may have limited functions.

SYMPTOM INDEX

ELECTRONIC BRAKE CONTROL MODULE

Note. When removing Brake Pressure Modulator Valve (BPMV) from Electronic Brake Control Module (EBCM), protect vehicle from possible brake fluid spillage.

POWERTRAIN CONTROL MODULE

Note. Before replacing PCM, carefully inspect all wiring and control components. Failure to test for short circuits may result in repeated PCM failure due to shorts and Quad-Driver failure. To prevent internal damage to PCM, ensure ignition switch is in OFF position when connecting or disconnecting PCM harness connectors or any electrical components.